Patents Assigned to Johnson, Matthey & Co., Limited
  • Patent number: 4737205
    Abstract: This invention relates to platinum group metal-containing alloys comprising, apart from impurities:(a) at least 40 wt. % nickel or at least 40 wt. % cobalt;(b) a trace to 30 wt. % chromium; and(c) a trace to 15 wt. % of one or more of the metals platinum, palladium, rhodium, iridium, osmium and ruthenium.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: April 12, 1988
    Assignee: Johnson Matthey & Co., Limited
    Inventors: Gordon L. Selman, Richard J. Midgley
  • Patent number: 4469849
    Abstract: A process for the hydrogenation of an unsaturated organic compound in emulsion comprises contacting the emulsion with gaseous or dissolved hydrogen in the prescence of a hydrogenation catalyst in solution.
    Type: Grant
    Filed: February 18, 1983
    Date of Patent: September 4, 1984
    Assignee: Johnson Matthey & Co., Limited
    Inventors: Barry A. Murrer, John W. Jenkins
  • Patent number: 4469666
    Abstract: This invention relates to catalyst units embodying or consisting of catalytic material in wire or strip (herein referred to simply as "wire") form and especially to such units for catalytic oxidation of gases.The catalyst unit of the invention is particularly suitable for use in the manufacture of hydrocyanic acid comprises a pack of woven metallic gauzes wherein at least some of the gauzes disposed at or towards the front of the pack are made from wire (as herein defined) having a cross-sectional area greater than at least some of the gauzes disposed at or towards the rear of the pack.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: September 4, 1984
    Assignee: Johnson Matthey & Co., Limited
    Inventors: David J. Stephenson, Alan E. Heywood, Gordon L. Selman
  • Patent number: 4435373
    Abstract: This invention is concerned with the application of fibrous products from platinum group metal or platinum group metal alloys to the oxidation of ammonia in the manufacture, for example, of nitric acid and to the production of hydrogen cyanide in the Andrassow Process. In particular, the invention relates to a catalyst assembly including an agglomeration or assemblage of randomly oriented fibres made from a platinum group metal or an alloy containing at least one platinum group metal, gold or silver. The fibres used in the catalyst assembly are preferably produced by melt extraction or melt spinning processes.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: March 6, 1984
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Arthur G. Knapton, Gordon L. Selman
  • Patent number: 4428768
    Abstract: A process for recovery of platinum group metals (PGMs) from refractory ceramic substrates containing an aluminium silicate and/or alumina, for example, wash-coated auto emission control catalysts and Pt reforming catalysts. A charge, in divided form, containing the substrate, one or fluxes and a collector is heated in a high heat intensity furnace, to a temperature of at least 1420.degree. C. to produce a molten metallic phase including a substantial proportion of the said metals and a molten slag phase. These are then separated and the platinum group metals subsequently extracted from the metallic phase. By choice of suitable fluxes, at least some alumina can be converted to an aluminium silicate which becomes molten at the operating temperature.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: January 31, 1984
    Assignee: Johnson Matthey & Co., Limited
    Inventor: Joseph G. Day
  • Patent number: 4418215
    Abstract: This invention is concerned with catalysis. More especially, the invention relates to catalytic metal or alloy or both in a form having enhanced catalytic properties, and to the use thereof in catalytic processes. In more detail a catalyst or catalyst substrate according to the invention comprises at least one metal and/or alloy body made by a melt spun or a melt extraction process.
    Type: Grant
    Filed: November 10, 1981
    Date of Patent: November 29, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: John W. Jenkins
  • Patent number: 4414071
    Abstract: An electrode for use as a cathode in a chloralkali cell or a water electrolysis cell comprises an electrically-conductive matrix having a very low metal loading surface electrocatalytic noble metal-containing deposit which may be prepared by a displacement deposition technique.
    Type: Grant
    Filed: April 15, 1981
    Date of Patent: November 8, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Donald S. Cameron, Susan J. Cooper
  • Patent number: 4399199
    Abstract: This invention relates to means for protecting substrates and in particular Ni- and Co-base superalloys from high temperatures, for example temperatures such as typically occur in gas turbine engines.In more detail an article suitable for use all elevated temperature (up to 1600.degree. C. and beyond) comprises a metallic substrate on which is deposited a first coating or layer comprising one or more of the platinum group metals or an alloy including one or more of the platinum group metals on which is deposited a second coating or layer comprising a thermal barrier layer.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: August 16, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Ian R. McGill, Gordon L. Selman
  • Patent number: 4392292
    Abstract: A method and apparatus for production of couplings for joining together sections of metal tubing, the couplings being of the type comprising sockets having e.g. an annular recess carrying a filler metal, whereby the filler metal comprises a plastic composition which is applied under pressure to a selected internal area of a section of deformable tubing, thereby to form an indentation containing a deposit of plastic composition.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: July 12, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: Ian B. Irons
  • Patent number: 4389983
    Abstract: This invention relates to internal combustion engines and particularly to igniting the fuel/air mixture of the engine. In more detail a catalytic engine comprises one or more cylinders, each cylinder having an associated piston and an entry port disposed at the top or in the region of the top of the cylinder and leading into a passage in communication with a precombustion chamber, means for injecting fuel into the combustion chamber, and a catalytic unit disposed across the entry port or across the said passage for catalytically igniting an injected fuel/air mixture, the catalytic unit including a thermally stable and oxidation resistant member having a multiplicity of flow paths or channels, the surfaces of which possess catalytic activity.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: June 28, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Bernard E. Enga, Christopher Prasad
  • Patent number: 4384549
    Abstract: This invention relates to boilers more particularly to shell boilers and improvements in their operation.In more detail this specification describes and claims a boiler comprising a housing, an inlet for leading a fuel or a fuel/gas mixture into a combustion chamber, at least one array of pipes in series with the combustion chamber, an exit for leading exhaust gases away from the boiler and means for cooling the pipes and the combustion chamber, characterized in that the boiler includes a catalyst disposed in such a position that at least a proportion of any unburnt fuel leaving the combustion chamber undergoes catalytic combustion.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: May 24, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: Bernard E. Enga
  • Patent number: 4375550
    Abstract: This invention relates to the hydrogenation of halogen-substituted aromatic nitro compounds and in particular provides a novel catalyst for use in such processes.In more detail a catalyst suitable for use in the hydrogenation of halogen-substituted aromatic nitro compounds substantially without simultaneous dehalogenation comprises one or more metals from the group consisting of platinum, palladium, rhodium, iridium, ruthenium and osmium supported on or impregnated into a carrier material comprising carbon activated with phosphoric acid or a salt thereof.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: March 1, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Alfred J. Bird, Gordon G. Ferrier
  • Patent number: 4375426
    Abstract: This invention is concerned with the application of fibrous products from platinum group metal or platinum group metal alloys to the oxidation of ammonia in the manufacture, for example, of nitric acid and to the production of hydrogen cyanide in the Andrassow Process. In particular, the invention relates to a catalyst assembly including an agglomeration or assemblage of randomly oriented fibres made from a platinum group metal or an alloy containing at least one platinum group metal, gold or silver. The fibres used in the catalyst assembly are preferably produced by melt extraction or melt spinning processes.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: March 1, 1983
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: Arthur G. Knapton, Gordon L. Selman
  • Patent number: 4364173
    Abstract: This invention relates to electrical contacts. The invention is specifically directed to electrical contacts comprising a base and a contact element having a contact surface and one method of making the contact includes the following steps:1. forming a blind or through hole in the base with at least one protrusion extending inwardly from the wall of the hole;2. inserting into the hole a contact element billet having a contact surface, and3. deforming the so inserted contact element billet so that the billet is at least partially retained within the hole by means of the said protrusion.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: December 21, 1982
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: Richard C. Broadhurst
  • Patent number: 4364727
    Abstract: A method of heat treatment of foodstuff in which a stream of oxygen-containing gas and fuel is passed over one or more catalysts to raise the temperature of the gas stream and the resulting hot, gas stream is contacted with foodstuff in which a proportion of the total fuel may be injected initially and a further proportion or proportions of fuel is subsequently injected preceding passage of the gas and fuel stream over a catalyst and the gas and fuel stream may be passed over catalysts in parallel or in series or so that a portion is continually divided off from the main stream flowing to a main catalyst and passed over a subsidiary catalyst and returned to a point in the mainstream upstream of where it was divided off.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: December 21, 1982
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: Bernard E. Enga
  • Patent number: 4362655
    Abstract: This invention is concerned with catalysis. More especially, the invention relates to catalytic metal or alloy or both in a form having enhanced catalytic properties, and to the use thereof in catalytic processes. In more detail a catalyst or catalyst substrate according to the invention comprises at least one metal and/or alloy body made by a melt spun or a melt extraction process.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: December 7, 1982
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: John W. Jenkins
  • Patent number: 4351887
    Abstract: This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants.Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: September 28, 1982
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: David C. Bishop, Alan E. Heywood
  • Patent number: 4342606
    Abstract: This invention relates to joining metallic parts by soldering and in particular to a soldering composition.A soldering composition in accordance with the present invention is solid at ambient temperatures and comprises a particulate soldering alloy or metal or oxide precursor thereof dispersed in a thermoplastic material. Conveniently, the soldering composition also includes one or more fluxes.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: August 3, 1982
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: John H. F. Notton
  • Patent number: 4329299
    Abstract: Compositions of matter suitable for the treatment of cancer comprise platinum co-ordination compounds having the general formula ##STR1## in which A is a straight-chain, branched chain or cyclic aliphatic amine, X and Y are halogen and the Z groups are halogen or hydroxy.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: May 11, 1982
    Assignee: Johnson, Matthey & Co., Limited
    Inventor: Paul C. Hydes
  • Patent number: RE32549
    Abstract: This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants.Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: November 24, 1987
    Assignee: Johnson Matthey & Co., Limited
    Inventors: David C. Bishop, Alan E. Heywood