Patents Represented by Attorney Irwin M. Strein

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  • Derivatives of carbocyclic fused naphthopyrans
    Patent number: 5783116
    Abstract: Described are novel pentahydrophenanthro?9,10-b!pyrans and tetrahydrocyclopenta?c!-naphtho?1,2-b!pyrans. Also described are polymeric organic host materials that contain or that are coated with such compounds.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: July 21, 1998
    Assignee: PPG Industries, Inc.
    Inventor: Jibing Lin