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:
Dec. 19, 1989
Filed:
Sep. 11, 1986
Applicant:
Inventor:
Karl-Ludwig Grell, Aurachtal, DE;
Assignee:
INA Walzlager Schaeffler KG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 165 ; 148 166 ; 148318 ; 148319 ;
Abstract
A method of producing a hardened non-magnetizable roller bearing element made of an austenitic material comprising carburizing the near-surface material layer of a roller bearing element in an oxygen-free atmosphere at high temperatures and then cooling the roller bearing element and the element produced by the process having a load bearing capacity equal to steel roller bearing elements but still non-magnetizable.