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Patents Represented by Attorney Irwin M. Strein
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