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:
Apr. 04, 1989
Filed:
Jul. 24, 1987
Applicant:
Inventors:
Tohru Arai, Aichi, JP;
Hironori Fujita, Aichi, JP;
Yoshihiko Sugimoto, Aichi, JP;
Yukio Ohta, Aichi, JP;
Shigeo Moriyama, Aichi, JP;
Akira Sato, Aichi, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
204 39 ; 148 155 ; 148 14 ;
Abstract
A surface layer which is composed of the carbonitride of at least one of vanadium and chromium is formed on an article made of iron or an iron alloy if the article, a material containing at least one of vanadium and chromium and a treating agent are heated together. The treating agent may be composed of at least one of the cyanides and cyanates of alkali metals and alkaline earth metals. The layer adhering closely to the article can be formed efficiently at a temperature which is so low that virtually no thermal strain may develop in the article.