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:
Feb. 03, 1976
Filed:
Jan. 13, 1975
Applicant:
Inventor:
Richard Kazeva, Lower Burrell, PA (US);
Assignee:
Allegheny Ludlum Industries, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 / ;
Abstract
There is disclosed a method for preparing nominally 13% chromium-0.3% columbium ferritic stainless steel by producing the steel to have very low content of residuals, carbon and nitrogen, hot rolling the steel, annealing the hot rolled steel, and cold rolling the annealed material to reduce the thickness at least 65 percent.