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:
Aug. 08, 1995
Filed:
Apr. 25, 1994
Applicant:
Inventors:
Richard A Gross, Chelmsford, MA (US);
John E Kemnitzer, Dracut, MA (US);
Stephen P McCarthy, Tyngsboro, MA (US);
Assignee:
University of Massachusetts Lowell, Lowell, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528354 ; 525408 ; 525413 ; 525415 ; 528357 ; 528361 ;
Abstract
High molecular weight, biodegradable polymers of substituted-poly(.beta.-propioesters), wherein the repeat unit sequences have a predominantly syndiotactic arrangement and a method of forming such polymers are disclosed. The method includes exposing a substituted-.beta.-propiolactone to a tin-based organometallic catalyst for a sufficient combination of time and temperature to form the predominantly syndiotactic substituted-poly(.beta.-propioester).