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. 20, 1997
Filed:
Nov. 07, 1995
Applicant:
Inventors:
Toshiyasu Sakakura, Tsukuba, JP;
Masato Tanaka, Tsukuba, JP;
Assignee:
Agency of Industrial Science and Technology, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525478 ; 528 31 ; 528 40 ;
Abstract
A highly heat-resistant crosslinked polymer is prepared by subjecting an organic-inorganic hybrid polymer consisting of the repeating monomeric units of the formula ##STR1## in which A is a divalent hydrocarbon group such as phenylene group, to an oxidative crosslinking reaction by heating in air at 50.degree. to 400.degree. C.