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:
Aug. 19, 2025
Filed:
Aug. 10, 2021
Toyobo Co., Ltd., Osaka, JP;
Kaya Tokuda, Otsu, JP;
Tetsuo Okuyama, Otsu, JP;
Naoki Watanabe, Otsu, JP;
Hiroyuki Wakui, Otsu, JP;
Harumi Yonemushi, Otsu, JP;
Denichirou Mizuguchi, Otsu, JP;
TOYOBO CO., LTD., Osaka, JP;
Abstract
Provided is a layered body including glass and a polyamic acid heat-cured product that is readily releasable from an inorganic substrate after being heated at 250° C. A layered body including an inorganic substrate and a polyamic acid heat-cured product, the layered body being characterized by a weight average molecular weight of 30,000 or greater for the polyamic acid, and a peel strength of 0.3 N/cm or weaker between the polyamic acid heat-cured product layer and the inorganic substrate, after the layered body has been heated at 250° C.