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. 08, 1998
Filed:
Jul. 12, 1996
Applicant:
Inventor:
Shigeyoshi Nozawa, Tokyo, JP;
Assignee:
Teisan Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
451 35 ; 451 36 ; 451 51 ; 451 61 ; 134-8 ;
Abstract
A method of treating an inner surface of a high-pressure gas vessel is disclosed. In the method, abrasive containing rust preventive is charged into the vessel made preferably of manganese steel or chrome-molybdenum steel and a wet-grinding step is carried out to obtain a maximum inner surface roughness of the vessel of 3 .mu.m or less. Thereafter, the inner surface is rinsed with an acidic rinsing solution.