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:
Aug. 21, 1990
Filed:
Mar. 06, 1989
Applicant:
Inventors:
Yoshiaki Shida, Ikoma, JP;
Hisao Fujikawa, Nishinomiya, JP;
Nobuyuki Maruyama, Amagasaki, JP;
Shunichiro Akiyama, Joetsu, JP;
Assignees:
Sumitomo Metal Industries, Ltd., Osaka, JP;
Nippon Stainless Steel Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219548 ; 219544 ; 219553 ; 29611 ; 420452 ; 420453 ; 338238 ;
Abstract
A corrosion-resistant steel tube such as a sheath heater steel tube and boiler tube which exhibit improved resistance to dry corrosion under high temperature dry-corrosive conditions in the presence of chlorides is disclosed. The steel consists essentially of, in % by weight: