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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.:

US 5556936 B1

PDFFull Text
Date of Patent:
Sep. 17, 1996

Filed:

Nov. 17, 1994

Aromatic polycarbonates having polyfunctional uv screening units, method

Applicant:
Inventors:

Joseph A King, Jr, Niskayuna, NY (US);

Patrick J McCloskey, Watervliet, NY (US);

Alice M Colley, Latham, NY (US);

David M Dardaris, Ballston Spa, NY (US);

Luca P Fontana, Brasschaat, BE;

Josef G Berndsen, Rilland, NL;

Assignee:

General Electric Company, Schenectady, NY (US);

Attorney:

Pittman; William H.

Primary Examiner:

James J Seidleck

Assistant Examiner:

Terressa Mosley

Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528199 ; 428412 ; 525467 ; 528196 ; 528201 ; 528203 ; 528204 ;
Abstract

UV stabilized polycarbonates are provided having chemically combined polyhydric phenol benzotriazole carbonate units, such as 1,1-bis(4-hydroxyphenyl)-1-[4-hydroxy-3-(N-2-benzotriazole)phenyl]ethane carbonate units and methods for making. Incorporation of the polyhydric phenol benzotriazole functional units into the polycarbonate backbone can be achieved by redistribution or transesterification under melt polymerization conditions.

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King, Jr, Joseph. (1996). Aromatic polycarbonates having polyfunctional uv screening units, method (U.S. Patent No. 5556936). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5556936

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