Patents by Inventor Francoise Saint-Pierre

Francoise Saint-Pierre 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).

  • Additives for oils
    Patent number: 3948843
    Abstract: Additives for oils prepared by polymerizing by an anionic process at least one vinyl aromatic compound and at least one conjugated diene in the presence of a solvent, followed by hydrogenation of the formed copolymer in the presence of the solvent, in which the solvent is a support oil having a viscosity within the range of 1 to 24 cst at 50.degree.C, a flash point of at least 120.degree.C and a pour point which is no greater than -10.degree.C.
    Type: Grant
    Filed: March 28, 1974
    Date of Patent: April 6, 1976
    Assignee: Rhone-Progil
    Inventors: Francoise Saint-Pierre, Bernard Chauvel