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:
Sep. 15, 1981
Filed:
Nov. 28, 1979
Applicant:
Inventors:
Assignee:
Daicel Chemical Industries, Ltd., Sakai, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528357 ;
Abstract
In a process for producing a lactone polyester which comprises ring-opening polymerization of a lactone in the presence of a metal containing organic compound as a catalyst, the improvement wherein said compound is an alcoholate, chelate or organic acid salt of vanadium or molybdenum.
Kubo, Masayoshi. (1981). Process for producing lactone polyesters (U.S. Patent No. 4289873). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4289873
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile