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:
Jun. 13, 1989
Filed:
Aug. 14, 1987
Applicant:
Inventors:
Thomas L Evans, Clifton Park, NY (US);
Carol B Berman, Hartsdale, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528370 ; 528371 ;
Abstract
Substituted phenols and phenyl carbonates derived therefrom, such as 2,4-dinitrophenol and 2,4-dinitrophenyl carbonate, are employed to inhibit the formation of linear polycarbonates from cyclic polycarbonate oligomers. Inhibition of polymerization initiated by impurities in the cyclics is noted. When polymerization is effected by basic polycarbonate formation catalysts, the phenols or phenyl carbonates decrease reaction rate.
Quick Actions:
Evans, Thomas. (1989). Cyclic polycarbonate oligomers: inhibition of polymerization to linear (U.S. Patent No. 4839462). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4839462
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile