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. 28, 2024
Filed:
Sep. 30, 2020
Kaneka Corporation, Osaka, JP;
Mari Uno, Shiga, JP;
KANEKA CORPORATION, Osaka, JP;
Abstract
A polyamic acid that is a polyaddition reaction product of a diamine and a tetracarboxylic dianhydrides, according to one or more embodiments of the present invention. The polyamic acid contains 2'-bistrifluoromethylbenzidine as a diamine component in addition to 3,3′,4,4′-biphenyltetracarboxylic dianhydride and 9,9′-(3,4′-dicarboxyphenyl)fluorenic dianhydride as tetracarboxylic dianhydride components. The polyamic acid may include 9,9′-(3,4′-dicarboxyphenyl)fluorenic dianhydride in an amount ranging from 0.5 mol % or more to 10 mol % or less based on total amount of the tetracarboxylic anhydride.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile