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:
Sep. 21, 2004
Filed:
Apr. 30, 2002
Tetsuya Shimizu, Nagoya, JP;
Michio Okabe, Chita, JP;
Daido Steel Co., Ltd., Nagoya, JP;
Abstract
Disclosed are stainless steel parts, particularly, parts of electronic apparatus, with which troubles caused by so-called “sulfide gas” mainly of H S must be avoided. Release of the sulfide gas from the parts is effectively suppressed. The parts have high hardness and corrosion resistance, and can be produced with high finishing accuracy. The stainless steel parts are produced by processing a ferritic or a martensitic stainless steel of a specific alloy composition by forging and/or machining to the shape of the part followed by quenching and tempering, or quenching and tempering followed by machining to the shape of the part, and applying a solution of oxidative acid to the surface of the part so as to dissolve and remove sulfides existing on the surface of the part.