Patents Assigned to Johnson Matthey & Company Limited
  • Platinum group metal-containing alloy
    Patent number: 4683119
    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: March 2, 1981
    Date of Patent: July 28, 1987
    Assignee: Johnson Matthey & Company, Limited
    Inventors: Gordon L. Selman, Richard J. Midgley
  • Exhaust gas purification
    Patent number: 4478797
    Abstract: An oxidation catalyst for use in a catalytic exhaust gas purification unit comprises a substrate on which a refractory metal oxide is coated, a base metal component and one or more metals from the Platinum Group. The catalyst is highly effective when a metallic substrate is employed and the loading of the refractory metal oxide coating is relatively high. The base metal is useful for catalysts having a ceramic substrate and a relatively low coating loading.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: October 23, 1984
    Assignee: Johnson Matthey & Company Limited
    Inventors: Alan F. Diwell, Andrew Salathiel