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:
Mar. 09, 2004
Filed:
Feb. 19, 2002
Masabumi Miyashita, Saitama, JP;
Shingo Watanabe, Saitama, JP;
Norifumi Misumi, Saitama, JP;
Naomichi Mitsuyama, Saitama, JP;
Nippon Leakless Industry Co., Ltd., Tokyo, JP;
Abstract
There is provided a non-chromium treated material in which peeling resistance between a metal plate and a rubber layer via a primer layer and a bond layer, which is decreased by fretting and antifreeze liquid, can be improved, the rubber layer is less liable to peel from the metal plate, and the material has little effect on the environment and human body. In a metal gasket raw material plate of a laminated form in which a rubber layer is provided on a stainless steel plate via a bonding layer , a primer layer of a silica-alumina condensate is formed on the surface of the stainless steel plate