Patents by Inventor Vladimir Lokshin

Vladimir Lokshin 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
  • Photochromic compounds and methods for their use
    Patent number: 5936016
    Abstract: The present invention relates to photochromic compounds of spiro?indoline?2,3'!-naphthoxazine! structure, characterized in that they contain, in the 6' position, a group R.sub.6 chosen from the following groups: cyano and phenylsulfonyl linked via the sulfur atom to carbon 6', and methods of using such compounds.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: August 10, 1999
    Assignee: Essilor International Compagnie Generale D'Optique
    Inventors: Pierre Lareginie, Vladimir Lokshin, Andre Samat, Robert Guglielmetti, Elena Zaballos Garcia
  • Ring spiro [fluorene-[2H]-benzopyranes] and their use in ophthalmic optics
    Patent number: 5604280
    Abstract: The invention concerns photochromic compounds with general formula (I): ##STR1## where R.sup.a, R.sup.b and R.sup.c represent hydrogen; alkyl, aryl, OR, SR, COR or COOR, where R represents hydrogen, alkyl or aryl, amino with formula NR.sub.1 R.sub.2, where R.sub.1 and R.sub.2 each represent hydrogen, alkyl, cycloalkyl, or aryl, R.sub.1 and R.sub.2 may together form a heterocycle containing four to seven members with the nitrogen atom and may intracyclically contain one or more heteroatoms selected from nitrogen, oxygen, sulphur, or a halogen atom; a mono- or polyhaloalkyl; an NO.sub.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: February 18, 1997
    Assignee: Essilor International Compagnie Generale D'Optique
    Inventors: Jean L. Pozzo, Robert Guglielmetti, Andr e Samat, Vladimir Lokshin, Guena elle Harie