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:
Oct. 14, 2025
Filed:
Feb. 22, 2019
Daicel Corporation, Osaka, JP;
Masato Hirooka, Tokyo, JP;
Yoshiaki Nishikawa, Tokyo, JP;
DAICEL CORPORATION, Osaka, JP;
Abstract
A cylindrical filter for a pyrotechnic device, including a gas generating agent or pressurized gas as a gas generation source, includes a first annular end surface, a second annular end surface positioned opposite to the first annular end surface, and a cylindrical wall surface between the first annular end surface and the second annular end surface. At least one of the first and second annular end surfaces includes a weakened portion. The weakened portion, when provided in the first annular end surface, includes a first annular wall portion protruding from the first annular end surface and has a thickness less than a thickness of the first annular end surface. The weakened portion, when provided in the second annular end surface, includes a second annular wall portion protruding from the second annular end surface and has a thickness less than a thickness of the second annular end surface.