Patents by Inventor Pascal Sperry

Pascal Sperry 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).

  • Oxygen-permeable transparent polymer compositions for contact lenses of the rigid type
    Patent number: 5166298
    Abstract: An oxygen-permeable transparent polymer composition for contact lenses of the rigid type comprises at least a first constituent having ethylene double bonds of the type which is polymerizable in a rigid matrix, and a second constituent formed by a silane monomer containing at least two silyl -SiH groups per molecule. The composition can include a third constituent of the polyorganosiloxysilane type.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: November 24, 1992
    Assignee: Essilor International (Compagnie Generale d'Optique)
    Inventors: Gilbert Friedmann, Pascal Sperry, Jean Brossas