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. 02, 2004
Filed:
Dec. 26, 2001
Applicant:
Inventors:
Tadahiro Ohmi, Miyagi-ken, JP;
Hirohisa Kikuyama, Osaka-fu, JP;
Masayuki Miyashita, Osaka-fu, JP;
Hiroto Izumi, Osaka-fu, JP;
Takanobu Kujime, Osaka-fu, JP;
Assignee:
Stella Chemifa Kabushiki Kaisha, Osaka-Fu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C 8/06 ; C23C 8/08 ;
U.S. Cl.
CPC ...
C23C 8/06 ; C23C 8/08 ;
Abstract
A stainless steel with a passive state fluorinated film formed thereon, which is easy to construct and does not produce particles even when it is welded, and a device using the same. The stainless steel does not cause leakage even when said film is formed on a sealing surface of a joint and a valve seat surface. The stainless steel is characterized in that at least a part of the surface coated with a passive state fluorinated film not thicker than 190Å consisting of a metal fluoride as a main component.