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:
Dec. 26, 1978
Filed:
Jan. 09, 1978
Applicant:
Inventors:
Kwo-Hrong Lai, Lynnfield, MA (US);
Harold N Silvers, Cambridge, MA (US);
Assignee:
Beatrice Foods Company, Peabody, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ; C08L / ;
U.S. Cl.
CPC ...
528370 ; 260858 ; 2608 / ; 2608 / ; 521189 ; 528 85 ;
Abstract
A process for preparing linear polycarbonates containing terminal hydroxyl groups with the essential exclusion of other terminal groups by reacting glycols having a carbon number > 4 and cyclic esters of carbonic acid via ester interchange reaction at 100-300.degree. C and 0.1 - 300 mm Hg.
Lai, Kwo-Hrong. (1978). Process for preparing polycarbonates (U.S. Patent No. 4131731). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4131731
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile