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:
Jun. 22, 2021
Filed:
Sep. 05, 2019
Applicant:
Fujifilm Business Innovation Corp., Tokyo, JP;
Inventors:
Kosaku Yoshimura, Kanagawa, JP;
Yasunobu Kashima, Kanagawa, JP;
Hajime Sugahara, Kanagawa, JP;
Hidekazu Hirose, Kanagawa, JP;
Assignee:
FUJIFILM BUSINESS INNOVATION CORP., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01); C08J 9/26 (2006.01); H01M 50/411 (2021.01);
U.S. Cl.
CPC ...
H01M 50/411 (2021.01); C08J 9/26 (2013.01); H01M 10/0525 (2013.01); C08J 2379/08 (2013.01);
Abstract
A porous polyimide film has an acid value within a range of 7 mgKOH/g to 20 mgKOH/g determined by acid-base titration, contains a metal group including alkali metals excluding Li, an alkaline earth metals, and silicon at a total content of 100 ppm or less relative to the porous polyimide film, and has a moisture absorption ratio of 0.5% or less.