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Olga G. Petrovskaia

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  • Acton, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Indeno-fused photochromic naphthopyrans
    • Patent number 6,736,998
    • Issue date May 18, 2004
    • Transitions Optical, Inc.
    • Olga G. Petrovskaia
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Indeno-fused photochromic naphthopyrans
    • Patent number 6,296,785
    • Issue date Oct 2, 2001
    • PPG Industries Ohio, Inc.
    • Clara M. Nelson
    • C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents