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:
May. 28, 2002
Filed:
Dec. 15, 1998
Applicant:
Inventors:
Kenji Kosuge, Himeji, JP;
Kishio Mochinaga, Himeji, JP;
Eiichi Nanba, Himeji, JP;
Nobuo Tachibana, Himeji, JP;
Shinya Ishii, Himeji, JP;
Naoki Yagi, Himeji, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D 1/76 ; C21D 6/00 ;
U.S. Cl.
CPC ...
C21D 1/76 ; C21D 6/00 ;
Abstract
A process for producing a grain-oriented electrical steel sheet wherein during the decarburization annealing step, the steel sheet is first rapidly heated in a rapid heating chamber and the PH O/PH ratio in the rapid heating chamber is more than the PH O/PH ratio in the decarburization annealing furnace so as to provide improved oxide film adhesion.