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:
Jun. 15, 1999
Filed:
May. 01, 1998
Applicant:
Inventors:
Yuanzhen Zhong, Wayne, NJ (US);
Philip F Wolf, Bridgewater, NJ (US);
Edward G Malawer, Wayne, NJ (US);
Kolazi S Narayanan, Wayne, NJ (US);
Assignee:
ISP Investments Inc., Wilmington, DE (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526263 ;
Abstract
Homogeneous copolymers of 60-99 mole % of vinyl pyrrolidone (VP) and 1-40 mole % 2-methylene-1,3-dioxepane (MDO), preferably 85-95 mole % VP and 5-10 mole % MDO, having a K-value of about 30-50, and a Tg of about 124-138.degree. C., are described herein. The copolymers are hydrolytically degradable in aqueous acid or basic solutions and biodegradable.