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:
Jan. 29, 2008
Filed:
Nov. 29, 2002
Kazunori Hayashida, Sayama, JP;
Takehisa Kida, Izumisano, JP;
Kazutoshi Yamamoto, Yamatokoriyama, JP;
Tomotaka Nakagawa, Kashiwara, JP;
Takahiro Yamagishi, Tokushima, JP;
Masanobu Kato, Tokushima, JP;
Kazunori Hayashida, Sayama, JP;
Takehisa Kida, Izumisano, JP;
Kazutoshi Yamamoto, Yamatokoriyama, JP;
Tomotaka Nakagawa, Kashiwara, JP;
Takahiro Yamagishi, Tokushima, JP;
Masanobu Kato, Tokushima, JP;
Jtekt Corporation, Osaka, JP;
Koyo Sealing Techno Co., Ltd., Tokushima, JP;
Abstract
The invention relates to a sealing composition which comprises a crosslinkable fluoroelastomer, a crosslinking agent for this elastomer and a reinforcing polyimide resin powder; and seals such as O-rings, made by molding the composition into a prescribed shape and crosslinking the molded article. According to the invention, seals free from metals and sulfur can be made from a fluoroelastomer suitable for the production unit for semiconductor devices without a scatter of physical properties within one seal or among seals, and the obtained seals are lowered in the compression set determined ate the same hardness level to cause little permanent set by compression in use, thus having a prolonged service life.