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:
May. 12, 1987
Filed:
Apr. 07, 1986
Applicant:
Inventors:
Joseph G Santangelo, Allentown, PA (US);
James J Weber, Allentown, PA (US);
Richard G Sinclair, Columbus, OH (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525523 ;
Abstract
The present invention is a novel class of block copolymers and a process of making the same. An alkylene oxide is reacted with CO.sub.2 in an organic solvent in the presence of an organometallic catalyst to form a polyalkylene carbonate. A second alkylene oxide is subsequently added without the addition of catalyst. The resulting product is a block copolymer comprising distinct, covalently linked, alkylene carbonate blocks.
Quick Actions:
Santangelo, Joseph. (1987). Process for producing novel block alkylene polycarbonate copolymers (U.S. Patent No. 4665136). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4665136
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile