Journal Archive

johnson matthey p.l.c. U.S. Patent 4,410,475

Articles such as jewellery may be fabricated by moulding under pressure and at elevated temperature a mixture of metallic particles and thermoplastic particles. The metals may be platinum group metals, Au, Ag and base metals such as Ni, Cu, Zn or Sn.

t.d.k. electronics co. ltd. U.S. Patent 4,416,709

An alloy highly resistant to corrosion for use in the core of a magnetic head has a composition of formula (Fe_pCo_qNi_r)_aM_bCr_cM′_dX_e where M is Ru alone or a mixture with Pt, Pd, Ir and/or Rh, M′ is a transition metal other than those in the formula, X is a vitrification element, p + q + r = 100%, a + b + c + d + e = 100% and e is 20−26%. A typical alloy is (Fe_5.6Co_94.4)₇₀4Ru2Cr(Si₁₀B₉₀)_23.50.5 Ti.

daiichi kigenso kagaku kogyo co. ltd. European Appl. 105,128

New ion exchange agents of increased resistance have the formula Zr(PO₄)_2y(SiO₂)_z.n′H₂O or M_2/1Zr(PO₄)_2y(SiO₂)_z.n′H₂O where 1 is the valence of the cation M, y is 0.02–2, z is 0.05–16.00 and n′ is 0–100. The cation may be derived from Groups IA, IB, IIA, IIB, IIA, IIIB, VA, VIA, VIIA and VIII. Platinum group metals, Ag and the lanthanides are among the cations proposed.

adw der d.d.r. East German Patent 203,054

Complexes L₂M, where L is a dithiobenzil, are made by reacting a HCl acid solution of the metal with a corresponding diketone or acyloin and P pentasulphide. M is Pt, Pd, or Ni.

energy conversion devices inc. European Appls. 99,866/67

An improved anode or cathode is formed by a transition metal host matrix incorporating one or more modifier elements, such as Ru co-sputtered with Ti or material with the composition Ni₃₁Co₆₅Ru₄.

massachussetts institute of technology and w.r. grace & co. European Appl. 99,894

Electrochemical reactions for energy and chemical production give improved yields when carried out in a solid-state cross-flow monolith reactor. The monolith may be made from yttria-stabilised ZrO₂ with screen printed Pt electrodes.

centre national de la recherche scientifique European Appl. 100,695

In a new form of cell the separate O₂ formation and H₂ formation catalysts are held apart by depositing them on different supports. The cell may use a Ru bipyridyl photosensitiser and the catalysts are usually platinum group metal or Ag.

olin corp. U.S. Patent 4,409,085

Reticulate cathodes for use in brine electrolysis are felts of plastics filaments coated with an electroconductive metal such as Ni, Mo, Co or a platinum group metal or alloy. The corresponding anodes are preferably of Ti mesh coated with Ru oxide.

bbc brown boveri & co. U.S. Patent 4,416,747

Water saturated with O₂ is used to produce O₃ in a cell where the electrolyte is solid. The electrolyte, such as a membrane, is coated on the cathode side with Pt and on the anode side with PbO₂.

olin corp. U.S. Patent 4,419,208

A low overvoltage electrode for use as a H₂ evolution cathode in an electrolytic cell has a conductive metal core with a Raney metal surface layer derived from an adherent (Ni-Ru)Al₃ beta-phase alloy containing 5−15% Ru.

photovolt corp. U.S. Patent 4,419,210

A membrane electrode for polarography comprises an auxiliary electrode preferably of pure Ag, a working electrode, preferably made of a noble metal such as Pt and a reference electrode, such as a Ag/AgCl electrode.

technic inc. U.S. Patent 4,406,755

Bright coatings free from microcracks are obtained from electroplating baths containing succinimide, pyridine or a pyridine derivative and an organopalladium complex such as PdL₂SO₄ where L is preferably ethylene diamine or propane-1,3-diamine.

degussa a.g. U.S. Patent 4,411,743

Good quality Pd coatings are obtained from an electroplating bath which is not corrosive to the substrate metal. The bath contains, per litre, 2−50g Pd of which 80−95% is present as sulphate and the remainder as sulphite, 40−100g H₂SO₄ and/or phosphoric acid and no HNO₃ acid.

langbein-pfanhauser werke a.g. U.S. Patents 4,416,740/41

Baths containing 5−30 g/l Pd, 5−30 g/l Ni and a Pd : Ni ratio of 30–90 : 70–10 are known to give alloy coatings able to replace Au. Their brightness and mechanical properties are now improved by using an acetylene imine or aminoalcohol brightener. The U.S. Patent 4,416,741 describes the use of acetylene alcohols and/or their ethers as brighteners.

nippon mining co. ltd. and nippon metal plating co. ltd. U.S. Patent 4,416,742

Electroplated coatings with a black or blue colour are obtained using a conventional Rh plating bath with an added organic carboxylic acid, aromatic sulphonic acid, amine, gelatin, butynediol and/or a hypo-phosphite, such as ethylenediamine.

j. & s. sieger ltd. British Appl. 2,125,554A

A sensing element for a catalytic flammable-gas detector has an electrically resistive heating element, such as a Pt or Pt alloy coil, embedded in a bead having a Pd, Pt, Rh or Ir catalyst dispersed over particles of a metal oxide support material prior to formation of the bead.

kernforschungszentrum karlsruhe g.m.b.h. British Appl. 2,126,204A

Apparatus for separating the gaseous H isotopes protium, deuterium and tritium from a gas stream uses a membrane, such as a Pd membrane, which is permeable to the H isotopes and impermeable to the gas stream.

konishiroku photo industry co. ltd. British Appl. 2,127,315A

A low emissivity wall material used in the construction of a vapour source-holding container may be of mirror-ground Pt or Au. The container is for an evaporative material such as Se-Te, Se-S, Fe-Ni or AgBr-I.

diamond shamrock corp. European Appl. 100,667

A new solid state transcutaneous blood gas sensor is constructed from a noble metal electrode (Ag or a platinum group metal), a Ag/Ag halide reference electrode and an O₂-permeable polymeric membrane electrolyte.

tokyo shibaura denki k.k. European Appl. 102,067

A gas detector for CO consists of a gas sensor and a reference sensor. The gas sensor is based on Sn oxide or another oxide semiconductor whose resistance changes on contact with the reducing gas, a pair of electrodes, of Pt-Au, and a layer of Pt, Pd or Rh deposited on an Al₂O₃, SiO₂ or ZrO₂ support. The reference sensor electrode is similar, except that the catalyst is Ag.

hitachi ltd. European Appl. 103,212

The current flowing through a Pt or other thermosensitive element is amplified and the signal processed to indicate the required parameter for the fuel intake required.

hellesens a/s European Appl. 103,588

Steel components are susceptible to H₂ attack in corrosive environments. The extent of such attacks on steel is now measured electrochemically on a steel member, coated with a Pd film, using the Devanathan principle.

nissan motor co. ltd. U.S. Patent 4,419,213

For installation in a vehicle exhaust system, an O₂ sensing element has a solid electrolyte concentration cell formed as a laminate of thin layers on a ceramic substrate in which a heater is embedded and to which lead wires are attached. A conductive cermet paste prepared by dispersing a mixture of 65 parts Pt powder and 5 parts of a ZrO₂-yttria powder (95 : 5 mole ratio) in 30 parts of an organic liquid vehicle may be used in its production.

g.t.e. products corp. European Appl. 104,623

An alloy for brazing ceramics, other non-metals and metals contains 0.25−5% of Ti, V and/or Zr, 25−85% Au and/or Pd and 15−70% Cu and/or Ni. The noble metal gives ductility to the alloy. Cr may also be optionally present in small amounts.

allied corp. U.S. Patent 4,405,391

An homogeneous, ductile foil, useful for brazing Fe, Ni and Co alloys, contains 1−41 at.% Pd, 0−20 at.% Cr, 11−20 at.% B, remainder Ni.

general electric co. U.S. Patent 4,414,178

An improved brazing alloy, particularly suitable for use in high temperature gas turbine engines, consists of 20−80% Pd, 2−13% Cr, 1−4% B, remainder Ni.

johnson matthey p.l.c. British Appl. 2,122,912A

A Pb-tolerant spark-ignition engine exhaust gas purification catalyst comprises Pt, Ru and/or Pd on ceria which is supported as a refractory oxide coated support. The combination of the Pt, Rh and/or Pd with ceria results in improved Pb tolerance.

johnson matthey p.l.c. British Appl. 2,122,914A

Particles in diesel engine exhaust gas are oxidised using an interstitial catalyst system comprising a catalyst such as Pt, Rh, Pd or their alloys, a layer of refractory metal oxide and a support comprising filamentary metallic material in a knitted or woven form. The gas is made to execute a sharp change in direction.

british petroleum co. p.l.c. British Appl. 2,125,400A

Methanol is produced by passing CO and H₂ over a supported Pd metal catalyst containing a Group IA metal, Group IIA metal or lanthanide element as promoter and supported on a C support with defined surface area characteristics.

babcock & wilcox co. European Appl. 99,658

Waste gases from a combustion process, such as a boiler, are passed through a recovery heat-exchanger which has a catalyst-coated surface to oxidise the combustion products and increase heat recovery. The catalyst may be Pt, Pd or Ni deposited on the surface by sputtering.

ste. francaise des produits pour catalyse procatalyse European Appl. 100,267

A multimetal catalyst is produced from Al₂O₃ or another support by several treatment stages: the impregnation with Pd and at least one base metal (includes lanthanide metals), activation, impregnation with a platinum group metal other than Pd and finally reduction. In one example Pd is used with Fe and Ce.

exxon research & engineering co. European Appl. 102,154

Olefins are hydroxylated with a water/oxidant mixture in the presence of a supported Os catalyst, such as Os₃(CO)₁₂ on MgO, optionally together with Nal. Typically isobutylene glycol is produced using this type of catalyst.

monsanto co. European Appl. 102,343

A gas stream containing HCN is produced, by reacting NH₃ and a hydrocarbon on a Pt-Rh gauze, and is scrubbed out of the gas stream with nitrilotriacetonitrile mother liquor. The liquor is fed to a unit for the production of nitrilotriacetonitrile.

eka a.b. European Appl. 102,934

A new form of catalyst for the well known anthraquinone process consists of one or more thin-walled coherent solid catalyst bodies forming parallel channels through which the working solution and H₂ pass. The platinum group metal catalyst preferably forms a thin layer on the walls.

phillips petroleum co. European Appl. 103,149

The adhesion of conductive metals to polyarylene sulphide surfaces after pretreatment with a Pd-Sn catalyst is increased by allowing the metallised board to age.

mobil oil corp. European Appl. 103,449

A new catalyst contains 0.05−5% each of Pt, Ir and Re uniformly dispersed throughout a porous refractory oxide support, instead of being deposited on the surface as before.

air products & chemicals inc. U.S. Patent 4,407,738

A specified single step impregnation method is used to impregnate a carrier consisting of Al₂O₃ spheres containing minor amounts of La oxide, Nd oxide and Ce oxide with Pd, Pt and Rh so as to obtain a desired distribution of the metals in the carrier particles.

degussa a.g. U.S. Patent 4,409,185

Pyrophoric Fe or Ni catalysts which may emit H₂ during storage or transport are packed in containers having a safety closure which is a hollow stopper provided with a relief valve and containing a recombination catalyst such as Pt and/or Pd supported on Al₂O₃.

uop inc. U.S. Patent 4,410,454

A catalyst for the oxidative purification of I.C.E. exhaust gases consists of a metallic support such as a Ni-Cr alloy electroplated with a mixture of platinum group and lanthanide metals, preferably Pd and Pt, and La or Ce.

imperial chemical industries p.l.c. U.S. Patent 4,410,455

A catalyst for the selective hydrogenation of acetylenic impurities in an olefin stream to olefins is made by calcining shaped pieces of a Ca aluminate cement at 900−1050°C and impregnating with a Pd salt solution below pH 1.3.

gulf research & development co. U.S. Patent 4,413,064

A catalyst for the conversion of synthesis gas to diesel oil is made by impregnating Al₂O₃ with an aqueous solution of a Co salt and a mixture of Th or La nitrate and Ru acetylacetonate in an organic solvent such as acetone-ethanol.

exxon research & engineering co. U.S. Patent 4,413,151

The hydroxylation of olefins to diols is catalysed by an Os carbonyl cluster complex supported on a carrier such as Al₂O₃, with NaI co-catalyst.

tokyo shibaura denki k.k. U.S. Patent 4,414,139

A catalyst for the oxidation of CO, especially in the waste gases from domestic cookers or heaters, is made by calcining a Li aluminosilicate clay, coating with Al₂O₃, and impregnating the Al₂O₃ coating with a platinum group metal, preferably Pt.

exxon research & engineering co. U.S. Patent 4,415,441

In a process for producing a high-octane hydrocarbon from naphtha and H₂ over a supported Repromoted Pt catalyst, the H₂ is at first added at no more than 75% of the rate required to maintain an optimum yield of hydrocarbons with over five C atoms.

degussa a.g. U.S. Patent 4,415,485

An internal coating of catalyst is provided on contact tubes in a simplified mechanised way by filling the inside of the tube with catalyst liquid and heating the surface of the liquid as it is drained from the tube. In an example an Al₂O₃ tube is filled with a Pt solution which was heated to 250°C as it was drained at a rate of 8cm/minute.

ricoh co. ltd. U.S. Patent 4,415,533

Malodorous exhaust gas from an electrophotographic machine is purified by passing it over a heated porous honeycomb oxidation catalyst in which the active material may be Pd or Pt, among others.

united technologies corp. U.S. Patent 4,415,537

A catalytic combustor for use with solid-fuel stoves consists of a carrier which is stable at high temperatures, such as La-stabilised Al₂O₃, supporting an active, S-tolerant catalyst such as Rh.

shell oil co. U.S. Patents 4,415,675/76

A catalyst for the conversion of synthesis gas to paraffins, alcohols and aldehydes is made by calcining a Ru-exchanged faujasite zeolite in N₂ and then in H₂, treating with a borane solution and again calcining successively in N₂ and H₂.

ethyl corp. U.S. Patent 4,415,749

A catalyst for the formation of ethanol and methyl acetate from methanol and synthesis gas consists of 1−10% Rh and 1−10% Fe supported on Al₂O₃ modified with Na or Ca.

e. i. du pont de nemours & co. U.S. Patent 4,415,754

Crude nitrobenzene is hydrogenated over a Pd-Pt-Fe/C catalyst, and aniline is separated from the tarry residue.

uop inc. U.S. Patent 4,416,804

A variety of conversion processes, particularly gasoline fraction reforming, are catalysed by an acidic multimetal composite containing 0.01−2% Pt or another platinum group metal, 0.05−5% Co, 0.01−5% Sn, 0.01−5% P and 0.1−3.5% halogen.

daikin kogyo k.k. U.S. Patent 4,418,046

In a process for the catalytic oxidation of CO, formaldehyde and/or methanol, a cylindrical honeycomb catalyst carrier is designed so that it can be regenerated in sections by the passage of hot air. The active component is finely divided Pd.

becton dickinson corp. U.S. Patent 4,419,451

A system for producing an atmosphere for culturing anaerobic microorganisms comprises, in a sealable container, a metal-metal salt couple (a) capable of reacting with O₂ and a catalyst for the reaction of O₂ with gas generated in the container. In (a) the metal salt may contain Pt or Pd and the catalyst may be a supported Pd catalyst.

institut francais du petrole French Appl. 2,521,448

If a natural gas stream, possibly containing small amounts of O₂ and odorised with tetrahydrothio-phene, is to be used as a chemical feedstock, the S compound should first be removed to prevent catalyst poisoning. This is done by mixing the gas with H₂ at elevated temperature and passing the mixture over a 0.1−5% Pd catalyst supported on Al₂O₃ or SiO₂.

institut francais du petrole French Appl. 2,523,955

A catalyst for the production of CH₄ from CO_x and H₂ in aqueous media is obtained by impregnating a vegetable carbon of high specific surface area with Ru acetylacetonate and reducing it in a stream of H₂.

degussa a.g. German Offen. 3,223,500

A three-way catalyst for the purification of I.C.E. exhaust gases consists of a carrier which is particulate Al₂O₃ or a ceramic honeycomb coated with Al₂O₃ impregnated with Ce oxide or a mixture of Ce oxide and Fe oxide in the ratio Ce : Fe of 9 : 2 to 1 : 8, and the ratio Pd : Rh of 2–20 : 1.

shell internationale research mij. b.v. British Appl. 2,123,404A

Carboxylic acid and related carboxylic esters are produced simultaneously by the reaction of different carboxylic esters with CO and H₂ at elevated temperature and pressure using a catalyst system containing a Ru compound, a Group VIII metal compound and an organic bromide or iodide. Other Group II metal and transition metal salts must be absent. Thus ethyl acetate and acetic acid may be produced from methyl acetate in the presence of Rh and Ru chlorides and CH₃I.

british petroleum co. p.l.c. European Appl. 100,607

Saturated straight-chain alcohols are produced from synthesis gas using a catalyst, especially a mixed oxide catalyst, containing Co, one or more of Cu, Ag, Ga, Zr, Zn and Th; one or more of Pt, Pd and Ni and one or more Group IA metals, in specified ratios. A typical catalyst is CuCoPd_0.05K_xO_y where x is about 1.5% and y satisfies the valence requirements.

chemische werke huls a.g. European Appl. 105,132

Acetic acid is produced by the rearrangement of methyl formate in the presence of a catalyst consisting of Rh, Rh salt or a Rh complex (but specifically excluding Group VA ligands), a Group VIB metal compound, (preferably Cr carbomyl and/or halide) and a halogen promoter such as CH₃I. At least 0.05mg atom, preferably 0.1−1mg atom, of Rh is used per mol of methyl formate.

sun tech. inc. U.S. Patent 4,405,496

The hydroformylation of propylene to n.butyraldehyde is catalysed by the complex Pt(acac)_2.5(SnCl₂.2H₂O).5(PPh₃).

monsanto co. U.S. Patent 4,405,814

The hydroformylation of formaldehyde to glycol aldehyde is catalysed by Rh-tertiary phosphine complexes, such as (CO)ClRh(PPh₃)₂ and a t.amine.

national distillers & chemical corp. U.S. Patent 4,405,821

The hydroformylation of formaldehyde in liquid organic media to glycol aldehyde is catalysed by ClRh(PPh₃)₃ and Bu₃PO.

shell oil co. U.S. Patent 4,408,078

The hydroformylation of olefins to aldehydes is catalysed by complexes of the type {(PPh₃)₂PtH(OPPh₂)}.

shell oil co. U.S. Patent 4,409,397

Specified asymmetric hydrogenation reactions are preferably catalysed by a system consisting of a complex (LRhCl)₂ where L is cyclooctadiene or norbornadiene and a chiral ferrocenyl phosphine ligand.

national distillers & chemical corp. U.S. Patent 4,413,146

Catalysts for the water-gas shift reaction and various organic hydrogenation and hydroformylation reactions consist of a lamellar material such as graphite, a clay or Zr dihydrogen phosphate intercalated with a Rh or Ru carbonyl cluster complex.

minnesota mining & manufacturing co. U.S. Patent 4,414,376

The hydrosilylation curing of vinyl siloxane polymers is catalysed by complexes (L)MX(L′)₂ or (L){RhX(CO)₂}₂ where L is a N heterocycle such as pyridine, phenazine or pyrazine, L′ is CO or L′₂ is cyclooctadiene and M is Ir or Rh.

montedison s.p.a. U.S. Patent 4,414,417

H transfer between alcohols and unsaturated ketones is catalysed by complexes of formula {M(L)(cod)}X where M is Ir or Rh and L is a phenanthroline or bipyridyl ligand. Mainly Ir complexes are used.

united technologies corp. U.S. Patent 4,416,710

Norbornene polymerised using a Ru chloride catalyst provides a useful binder for gasoline and other liquids to give solid fuels.

e. i. du pont de nemours & co. U.S. Patent 4,416,801

The oxidative carbonylation of toluene with CO and O₂ to toluic acid is catalysed by a mixture of 1.5−95 mol % platinum group metal and perfluorinated polymeric sulphonic acid or its salts (5−98.5 mol %). The two components may be combined, in Pd-exchanged Nafion resin. The text discloses a wider range of S oxyacids as co-catalysts.

th. goldschmidt a.g. U.S. Patent 4,417,068

The hydrosilylation of compounds containing olefinic double bonds is catalysed by compounds of general formula M(NH₃)₂X₂, where X is Cl, Br, I or NO₂ and M is Pd or Pt.

mobil oil corp. U.S. Patent 4,417,973

Hydrocarbon stocks of high olefin content are upgraded by sequential hydroformylation and hydrogenation. The hydroformylation catalyst may be a compound of ruthenium, Ir, Rh or Os.

alkem g.m.b.h. European Appl. 100,941

Spent fuel rods are heated to expand the sheathing. The fuel released is dissolved in an O₂ atmosphere where Ru and other platinum group metals are lost as volatile compounds with O. They are recovered in a cold trap.

hitachi ltd. U.S. Patent 4,407,905

In an improved, stabilised, gas-diffusion electrode for a fuel cell, a conductive permeable substrate is coated with a catalyst consisting of colonies of primary metal particles uniformly distributed on a carrier powder. The metal is a platinum group metal.

u.s. department of energy U.S. Patent 4,407,906

An improved catalytic electrode for use in a phosphoric acid fuel cell consists of a graphitised C substrate coated with a Pd-Pt alloy in a hydrophobic binder.

w. r. grace & co. U.S. Patent 4,413,041

A fuel cell reactor consists essentially of a stack of ribbed solid electrolyte sheets (ZrO₂ stabilised with CaO or Y oxide) coated with a catalyst such as Pt or Pt-Rh alloy.

texas instruments inc. U.S. Patent 4,407,711

In an impressed-current corrosion-protection system for hot-water tanks, the electrochemically active non-sacrificial anode consists of a strand of Ti, Nb or Ta coated with Pt, Ir and/or Ru.

consolidated technology corp. British Appl. 2,124,423A

An apparatus for safely purifying H₂ gas and a method for preventing explosions in laboratory scale H₂ gas diffusion purification units, which may use a series of Ag-Pd tubes, are described.

konishiroku photo industry co. ltd. British Appl. 2,125,980A

Ag halide colour photographic material has a light-sensitive Ag halide emulsion layer containing at least one cyan-forming coupler and optionally Au sensitisers, such as K chloroaurate, or sensitisers of water-soluble salts of Ru, Rh, Ir, Pt or Pd, such as ammonium chloropalladate or K chloroplatinate. A Pd/C catalyst is used as a hydrogenation catalyst in the production of the couplers.

national research development corp. U.S. Patent 4,412,893

In a method for recovering metals more noble than Fe by electrolysis of their salt solutions in the presence of ferrous ions, relative motion is maintained between the solution and the anode which is of graphite, Pt, platinised Ti, Ti coated with Ir oxide or Pt coated with Ir oxide.

corning glass works U.S. Patent 4,414,281

Machinable glass-ceramics having an integral surface layer of Cu or Ag are made by fusing specified mixtures of SiO₂, Mg oxide, Mg fluoride, K oxide or Ba and Sr oxides, Al₂O₃, B₂O₃ and Cu oxide or Ag oxide in a Pt crucible, shaping, and heating in a reducing atmosphere.

u.s. department of energy U.S. Patent 4,414,282

Glass ceramic compositions for making seals to Inconel are made by fusing specified oxide mixtures in a Pt or Pt-Rh crucible.

eglasstrek patent promotion & awarding g.m.b.h. German Offen. 3,329,843

In a process for making flat glass, a stream of molten glass is drawn across a flat refractory or Pt alloy surface by a Pt alloy or stainless steel device.

litton systems inc. British Appl. 2,124,033A

Radially directed internal magnetisation, for instance in a bearing, is obtained by forming a magnet from axial slices which are stacked to form a cylinder with a central bore. Pt-Co and lanthanide-Co magnet alloys are preferably used.

hitachi ltd. European Appl. 99,564

A recording medium free from spike noise has a high permeability magnetic material film, an antiferromagnetic material film and a perpendicularly oriented magnetic film. The high permeability film may be made of a Co-Ru alloy.

ciba-geigy a.g. European Appl. 99,860

The photoredox properties of a wide variety of chalcogenide semiconductor powders (among them Ag sulphide) are improved by heat treatment at up to 150°C under pressure. The products may be coated with metal, especially Pt.

hughes aircraft co. U.S. Patent 4,410,874

A large area hybrid microcircuit assembly includes thick film leads preferably made from pastes of Pt-Ag or Pt-Au alloy.

ngk spark plug co. ltd. U.S. Patent 4,414,483

In a specified powder metallurgy process spark plug electrodes are made from alloys of Ag and Au with each other and/or Pt, Pd and/or Cr.

u.s. philips corp. U.S. Patent 4,415,486

A resistor paste consists of an organic vehicle, a glass frit and one of a rhodite, Ag_xPd_1−xRhO₂ or its alloy with Ag and Pd, or Ag-Pd alloy particles coated with the rhodite.

r.c.a. corp. U.S. Patent 4,415,624

Thick film resistor or conductor inks based, respectively, on RuO₂, and a precious metal and Bi oxide, can be fired in air when the frit used is a Ca Ba borosilicate glass.

international business machines corp. U.S. Patent 4,415,905

The wear resistance of an electrolytic printing electrode is considerably increased by coating the substrate tip with a thin layer of TiO₂ and Ru oxide.

bell telephone laboratories inc. U.S. Patent 4,416,516

A new combination of an electrochromic Ir oxide electrode and a Ta oxide counter electrode produces a device which has a short circuit memory, colouration threshold and response time.

e. i. du pont de nemours & co. U.S. Patent 4,416,932

A thick film conductor composition suitable for use in terminations for hermetic ceramic capacitors consists of a mixture of 30−80% finely divided noble metal or alloy (preferably a mixture of Ag, Pt and Pd), 1−20% finely divided low-viscosity glass, 0.1−10% metal oxide capable of reacting with Al₂O₃ to form a spinel and 0.1−2% organotitanium complex, especially an alkoxy complex.

t.d.k. electronics co. ltd. U.S. Patent 4,416,943

Super high density recordings can be made by using a thin layer (up to 500Å) of an alloy containing at least 50% Co, and one or more of Zn, Rh and Ir.

emi-varian ltd. U.S. Patent 4,417,173

Thermionic electron-emitters consist of a porous matrix of W, impregnated with a Group IIA metal activator, coated with 1 μ m of a sigma phase alloy such as an alloy of Os, Ir or Rh with Mo, Ta or Nb.

cts corp. U.S. Patent 4,418,009

Shaped electrical resistors are made by mixing powdered glass with a finely divided refractory oxide filler and a thermally decomposable resinate of Pt and/or Ru, heating to decompose the resinate, and then shaping and firing at a temperature sufficient to fuse the glass but below the softening point of the refractory oxide.

n.v. philips’ gloeilampenfabrieken German Offen. 3,321,944

An improved magnetic recording material consists of a non-magnetic substrate coated with a film of Co containing 15−30 at.%Cr and 1−5 at.%Pt.

h. sugimori British Appl. 2,124,410A

A heater control device in which energy consumption by the control circuit is largely reduced includes a temperature sensor, such as a Pt resistor.

armstrong world industries inc. U.S. Patent 4,419,023

In a passive fast-response insulated-foil thermocouple probe, the metal pairs forming the thermocouple junctions may be made of Pt-Rh alloys.

polystan (great britain) ltd. British Appl. 2,124,387A

A polarographic O₂ sensor intended primarily for measuring levels of O₂ in blood during by-pass surgery may include a Ag anode and a Pt cathode.

telectronics pty. ltd. British Appl. 2,124,495A

Twenty two metallic tubes, preferably Pt, are placed in small holes in a ceramic plate to form feed-throughs in an implantable medical prosthetic package which includes a coil in the tube of bio-compatible material, preferably Pt.

university of strathclyde European Appl. 99,758

In a multilayer wound dressing, especially for use in combination with the application of electrical stimuli, a biodegradable tissue interface layer such as collagen is preferably coated on to a layer of fabric plated with Ag, Au or Pt, for example, protected on its other side with a semipermeable membrane of collagen or Ca alginate.

hellige g.m.b.h. European Appl. 102,033

An electrochemical sensor for the transcutaneous measurement of CO₂ partial pressure in a living body uses an Ir/Ir oxide/membrane measuring electrode in contact with a buffer solution mounted on a Cu or Ag base.

i. shoher European Appl. 104,320

The crown is prepared from a thin metal foil substrate coated with a noble metal composition of low melting point, for example a Pt foil coated with Au. The foil is folded into a number of triangular flaps or pleats to form the jacket on a die.

telectronics pty. ltd. U.S. Patent 4,408,604

A procedure for fabricating a porous Pt electrode tip for a cardiac pacemaker is claimed.

netherlands tno U.S. Patent 4,410,544

Complexes of Pt with a large number of diamines may be used in the treatment of tumours and are considerably less toxic than cisplatin.

jeneric industries inc. U.S. Patent 4,419,325

A dental alloy for use in porcelain-fused-to-metal restorations includes Pd, Ga and optionally Cu, Au, Al, Co, Ru or Re. The Ru or Re provides grain refining for the alloy to increase its elongation, tensile strength and thus toughness.

research corp. U.S. Patent 4,419,351

Blue or green Pt-(2,4-dioxopyrimidine) complexes, useful as anti-tumour, anti-bacterial and anti-viral agents, are prepared by reacting a 2,4-dioxopyrimidine with cis-diaquodiammine Pt(II) at 0−55°C and pH 3–8.

m. wenzel German Offen. 3,218,859

Useful agents for examining adrenal activity are labelled metallocenes of general formula Cp₂MCH₂NHCH₂R, where M is Ru, Os or Fe.