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. 23, 2023
Filed:
Feb. 06, 2019
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Ken Sakai, Tokyo, JP;
Shinichi Kitamura, Tokyo, JP;
Kohei Kurihara, Tokyo, JP;
Yusuke Ota, Tokyo, JP;
Assignee:
JFE STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D 9/56 (2006.01); C21D 1/26 (2006.01);
U.S. Cl.
CPC ...
C21D 9/563 (2013.01); C21D 1/26 (2013.01);
Abstract
A method of annealing a steel sheet in an annealing furnace, including: supporting and conveying a steel sheet with hearth rolls; and supporting and conveying the steel sheet with a full-ceramic hearth roll as a hearth roll located in an area where a furnace temperature is equal to or higher than 950° C., wherein a main constituent of the full-ceramic hearth roll is silicon nitride with use of an Al—Y-based sintering aid.