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:
Mar. 12, 1991
Filed:
Sep. 14, 1989
Applicant:
Inventors:
Edgar Leitz, Dormagen, DE;
Ludwig Bottenbruch, Krefeld, DE;
Karl-Heinz Ott, Leverkusen, DE;
Alfred Jung, Krefeld, DE;
Ulrich Grigo, Kempen, DE;
Assignee:
Bayer Aktiengesellschaft, Bayerwerk, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528371 ; 528171 ; 528222 ; 528370 ;
Abstract
This invention relates to a process for the production of aromatic polycarbonates from cyclic aromatic carbonate oligomers in the presence of aprotic organic solvents at low temperatures.
Quick Actions:
Leitz, Edgar. (1991). Polymerization of cyclic aromatic oligomers with low temperature aprotic (U.S. Patent No. 4999420). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4999420
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile