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:
Oct. 27, 1987
Filed:
Feb. 10, 1986
Idemitsu Kosan Company Limited, Tokyo, JP;
Abstract
There are disclosed a novel copolymer comprising having recurring unit represented by the formula: ##STR1## wherein Y represents a phenylene group or a naphthylene group, with a recurring number of k and a recurring unit represented by the formula: ##STR2## wherein Ar represents a divalent aryl group, with a recurring number of l, a value of k/(k+l) is 0.5 to 0.97 and having a reduced viscosity [.eta..sub.sp/c ] of 0.3 dl/g or higher as measured in p-chlorophenol solution at a concentration of 0.2 g/dl at 60.degree. C., and a process for producing the novel copolymer comprising the steps of:
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile