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. 10, 1977
Filed:
Jul. 01, 1975
Applicant:
Inventors:
Shigeru Kurosawa, Yokohama, JA;
Takashi Ueshima, Yokohama, JA;
Yasuzi Tanaka, Kawasaki, JA;
Shoichi Kobayashi, Yokohama, JA;
Assignee:
Showa Denko Kabushiki Kaisha, , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
526 15 ; 210 54 ; 526142 ; 526144 ; 260 / ; 526240 ; 260 302 ; 526281 ; 528481 ; 260 / ; 428337 ; 428461 ; 260 / ; 428507 ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 2603452 ; 2603466 ; 260874 ; 260881 ; 260885 ; 260886 ; 260887 ; 2608 / ; 2608 / ; 260898 ; 260899 ; 260901 ; 526 27 ; 526 30 ; 526 41 ; 526 42 ; 526 47 ; 526 49 ; 526 56 ; 526 / ;
Abstract
Processes for preparing novel polymers containing carboxyl or carboxylate groups which comprises hydrolyzing starting polymers containing acid anhydride groups in the presence of acids or alkalies, the starting polymers being prepared by ring-opening polymerization of acid anhydride-type norbornene derivatives, and the characteristics and utility of these novel polymers are disclosed.