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. 20, 1980
Filed:
Jun. 28, 1978
Applicant:
Inventors:
Senichi Yamada, Nagoya, JP;
Yoshio Kato, Nagoya, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ; C21D / ;
U.S. Cl.
CPC ...
148 / ; 148 124 ; 148 37 ; 148 38 ;
Abstract
Heat-treated steel of particular, but known, composition is quenched, worked in one direction and then hardened by tempering to form a uni-directional lamellar structure of tough martensite in a uniform austenite matrix.