The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 1998
Filed:
Oct. 23, 1997
Applicant:
Inventor:
Jibing Lin, Murrysville, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; C07D / ;
U.S. Cl.
CPC ...
252586 ; 549298 ; 549383 ; 549 43 ; 549 58 ; 549264 ; 549330 ; 546165 ; 5462827 ; 5462804 ; 5462811 ; 548463 ;
Abstract
Described are novel 7-methylidene-5-oxo-furo fused naphthopyran compounds having certain substituents at the 2 position of the pyran ring. Also described are polymeric organic host materials that contain or that are coated with such compounds.