Patents by Inventor Gilbert Pittet

Gilbert Pittet 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).

  • Photostable cosmetic light screening compositions
    Patent number: 6338838
    Abstract: The present invention relates to a photostable cosmetic or pharmaceutical light screening composition containing a dibenzoylmethane UV-A screening agent and a p-methoxycinnamate UV-B screening agent, one of said agents being incorporated into a polymer latex; and, optionally, other conventional UV-A and UV-B screening agents. Additionally, the present invention relates to a method of photostabilizing dibenzoyl-methane UV-A screening agents and p-methoxycinnamate UV-B screening agents when used together, by incorporating one of these agents into a polymer latex.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: January 15, 2002
    Assignee: Roche Vitamins Inc.
    Inventors: Guy Berset, Gilbert Pittet, Joël François Richard, Dominique Sidrac
  • Light screening agents
    Patent number: 6033649
    Abstract: Photostable, cosmetic light-screening composition, comprising, in a cosmetically acceptable vehicle containing at least one fatty phase, about 0.1 to about 5%, in particular about 1 to about 3% by weight, of a dibenzoylmethane type UV-A screening agent and at least about 0.5%, in particular about 0.5 to about 4.5% by weight, of a .alpha.-cyano-.beta.,.beta.-diphenyl-acrylate stabilizer, the mole ratio of the acrylate to the dibenzoylmethane derivative being less than 0.8, if the amount of the dibenzoylmethane is 1% or more, and, optionally, at least one conventional UV-B filter.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: March 7, 2000
    Assignee: Roche Vitamins Inc.
    Inventors: Hans Ulrich Gonzenbach, Gilbert Pittet