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:
Feb. 11, 1992
Filed:
Jun. 07, 1990
Applicant:
Inventors:
Kevin R Stewart, Schenectady, NY (US);
Andrew J Salem, Schenectady, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528371 ; 524611 ; 524612 ; 528196 ; 528198 ; 528200 ; 528370 ;
Abstract
Cyclic polycarbonate oligomers are converted to linear polycarbonates by the catalytic action of a monobasic metal salicylate. The polymerization reaction takes place only at relatively high temperatures, typically above about 220.degree. C., and rapidly only at temperatures above about 250.degree. C., and is therefore particularly useful in such operations as resin transfer molding. The catalyst may be coated on a fibrous reinforcing material used for composite formation.
Stewart, Kevin. (1992). Preparation of linear polycarbonates from cyclic oligomer compositions (U.S. Patent No. 5087692). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5087692
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile