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:
Jul. 01, 1980
Filed:
Sep. 12, 1977
Applicant:
Inventors:
Shoji Shimada, Kitakyushu, JP;
Kazuhiko Yoshinari, Kitakyushu, JP;
Hidefumi Koyakumaru, Kitakyushu, JP;
Assignee:
Nippon Steel Corp., Ote, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 16 ; 148 203 ; 148121 ;
Abstract
A process of annealing for preventing temper colors on a steel sheet in a box annealing furnace, which comprises placing an oxidizable iron-base material at a position of low temperature in a circulating path of a furnace gas.