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:
Jul. 26, 1988
Filed:
Sep. 15, 1986
Applicant:
Inventors:
Thomas L Evans, Clifton Park, NY (US);
Tohru Takekoshi, Scotia, NY (US);
Patricia P Anderson, Albany, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
525394 ; 525146 ; 525148 ; 525413 ; 525415 ; 525425 ; 525432 ; 525433 ; 525439 ; 525453 ; 525464 ; 525467 ; 525468 ; 525471 ; 525474 ; 525535 ;
Abstract
Copolycarbonates are prepared by ring-opening cyclic polycarbonate oligomers with various nucleophilic polymers. The latter include 'living' anionic vinyl polymers; polymers such as polyphenylene ethers or hydroxyaryl-terminated polyimides which contain deprotonated hydroxy or carboxy groups; polymers containing neutral nucleophilic moieties, such as secondary amine-terminated polyimides, polyethersulfones and polyetherketones; and anionic polymers of ring-opened compounds such as cyclic polysiloxanes, lactams and lactones.