Patents by Inventor Raymond Darras

Raymond Darras has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4140655
    Abstract: A catalyst which is capable of carrying out simultaneously the oxidation of hydrocarbons and of carbon monoxide and the reduction of nitrogen oxides which are present in the exhaust gases of internal combustion engines comprises a support of inert material coated with lanthanum oxide and a catalytic phase constituted by ruthenium combined with lanthanum in the form of mixed oxide of the perovskite type, by platinum or palladium and by rhodium.
    Type: Grant
    Filed: June 7, 1977
    Date of Patent: February 20, 1979
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jacqueline Chabot, Raymond Darras, Roger Gabilly, Gisele DE LA Perriere