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:
Mar. 10, 2026
Filed:
Apr. 14, 2022
Daxin Materials Corp., Taichung, TW;
Kuan-Liang Yeh, Taichung, TW;
Chi-Yen Lin, Taichung, TW;
DAXIN MATERIALS CORP., Taichung City, TW;
Abstract
A polyimide precursor includes a repeating unit of formulae (I) and (II): where R1 and R3 are each a tetravalent group of a tetracarboxylic dianhydride residue, and R2 and R4 are respectively a divalent group of a residue of a first-type diamine and a divalent group of a residue of a second-type diamine. The first-type diamine is represented by formula (III), and the second-type diamine is represented by formula (IV). A resin composition including the polyimide precursor, a polyimide formed from the polyimide precursor, and use of the polyimide are also provided.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile