Patents by Inventor Karine Chamontin

Karine Chamontin 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).

  • Homoazaadamantane spirooxazines and their use in the field of ophthalmic optics
    Patent number: 6136968
    Abstract: Described are novel reversible photochromic compounds of the homoazaadamantane spirooxazine family. Certain substituents are present on the nitrogen atom of the homoazaadamantane portion of the compound and on the benzene ring fused to the oxazine portion of the compound. These compounds may be represented by the following formula: Also described are compositions, e.g., solvent based mediums and polymerized organic materials, used to produce ophthalmic components, that contain the homoazaadamantane compounds with or without other photochromic compounds.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: October 24, 2000
    Assignee: Transitions Optical Inc.
    Inventors: Karine Chamontin, Vladimir Lokshin, Andre Samat, Robert Guglielmetti
  • Photochromic spirooxazine compounds, their use in the field of ophthalmic optics
    Patent number: 6019914
    Abstract: The new photochromic compounds according to the invention, of the spiro[indoline-[2,3']-benzoxazine] type, include at least one electron-withdrawing group attached to the benzoxazine structure in 5' or 6' position by a chain containing at least one ethylenic double bond.Application to ophthalmic optics.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: February 1, 2000
    Assignee: Essilor International Compagnie Generale D'Optique
    Inventors: Vladimir Lokshin, Karine Chamontin, Robert Guglielmetti, Andre Samat