Patents by Inventor Marc Daire

Marc Daire 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).

  • High-hardness abrasive product based on alumina and aluminium oxycarbides and process for preparing same
    Patent number: 4341533
    Abstract: The invention relates to a new class of high-hardness abrasive products and wear resistant parts based on alumina and aluminium oxycarbides. By fusing alumina in the presence of a carbonaceous substance and by controlled cooling, it is possible to obtain a large number of products in which the ratio .rho. of the number of carbon atoms to the number of carbon atoms plus oxygen atoms is between 0.01 and 0.50, and preferably between 0.02 and 0.20. These products are essentially constituted by primary alumina crystals in a eutectic matrix Al.sub.2 O.sub.3 - Al.sub.4 O.sub.4 C or Al.sub.2 O.sub.3 - Al.sub.2 OC.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: July 27, 1982
    Assignee: Societe Francaise D'Electrometallurgie-Sofrem
    Inventors: Marc Daire, Yves Larrere, Andre Mangin