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:
Dec. 05, 2000
Filed:
Jul. 07, 1997
Applicant:
Inventors:
Takeshi Suwa, Kobe, JP;
Mitsuru Shinkoda, Kobe, JP;
Assignee:
Shinko Pantec Co., Ltd., Hyogo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
4284721 ; 148606 ; 148286 ;
Abstract
A treated stainless steel is used as the material of construction for parts of an apparatus exposed to an organic amine. The stainless steel is treated by cleaning the stainless steel, forming a colored oxide film on the surface of the cleaned stainless steel by heating the cleaned stainless steel in an oxidizing atmosphere, and removing a portion of the colored oxide film to expose a passivating oxide film.