Patents by Inventor Catherine Keromest

Catherine Keromest 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).

  • Copolymers usable as multifunctional additives for lubricants and lubricating compositions containing said copolymers
    Patent number: 5366649
    Abstract: Modified copolymers usable as additives for lubricants and having antiwear and viscosity index-improving properties are prepared by the modification of ethylene-propylene copolymers or ethylene-propylene-diene terpolymers in such a was as to fix the sulphur and phosphorus. Such modified copolymers contain 0.2 to 2% phosphorus, and 0.4 to 4% sulphur and are used in a lubricating composition at a rate of 0.25 to 10%.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: November 22, 1994
    Assignee: Institut Francais du Petrole
    Inventors: Jean-Pierre Durand, Catherine Keromest, Maurice Born