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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.:

US 12351685 B1

PDFFull Text
Date of Patent:
Jul. 08, 2025

Filed:

Feb. 03, 2020

Polyamide acid, polyimide, optical film, display device and production methods thereof

Applicant:

Central Glass Company, Limited, Ube, JP;

Inventors:

Hiroshi Eguchi, Kawagoe, JP;

Ayumi Yamaguchi, Kawagoe, JP;

Yukari Hara, Kawagoe, JP;

Kei Matsunaga, Kawagoe, JP;

Hiroto Hori, Kawagoe, JP;

Yosuke Murakami, Kawagoe, JP;

Kensuke Hirotaki, Kawagoe, JP;

Kenji Hosoi, Kawagoe, JP;

Assignee:

Central Glass Company, Limited, Ube, JP;

Attorney:

Crowell & Moring LLP

Primary Examiner:

Ha S Nguyen

Int. Cl.
CPC ...
C08G 73/10 (2006.01); C07B 61/00 (2006.01); C07C 17/266 (2006.01); C07C 17/32 (2006.01); C07C 22/08 (2006.01); C07C 37/20 (2006.01); C07C 37/62 (2006.01); C07C 39/16 (2006.01); C07C 41/30 (2006.01); C07C 43/225 (2006.01); C07C 45/63 (2006.01); C07C 201/12 (2006.01); C07C 205/22 (2006.01); C07C 209/78 (2006.01); C07C 211/56 (2006.01); C07C 213/08 (2006.01); C07C 215/80 (2006.01); C08G 73/12 (2006.01); C08J 5/18 (2006.01);
U.S. Cl.
CPC ...
C08G 73/1039 (2013.01); C07C 17/32 (2013.01); C07C 22/08 (2013.01); C07C 37/62 (2013.01); C07C 39/16 (2013.01); C07C 41/30 (2013.01); C07C 43/225 (2013.01); C07C 201/12 (2013.01); C07C 205/22 (2013.01); C07C 209/78 (2013.01); C07C 211/56 (2013.01); C07C 213/08 (2013.01); C07C 215/80 (2013.01); C08G 73/1028 (2013.01); C08G 73/1078 (2013.01); C08G 73/123 (2013.01);
Abstract

A polyimide which is obtained by a reaction of an aromatic diamine having a 1,1,1-trifluoro-2,2-ethanediyl group (—C(CF)H—), as a linkage skeleton, with a tetracarboxylic dianhydride is easily dissolved in an organic solvent and exhibits excellent film forming properties. In addition, the thus-obtained polyimide can be used for an optical film and a display device.

Find Patent Forward Citations

Eguchi, Hiroshi. (2025). Polyamide acid, polyimide, optical film, display device and production methods thereof (U.S. Patent No. 12351685). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12351685

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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