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:
Aug. 09, 1977
Filed:
Nov. 04, 1974
Applicant:
Inventor:
Karl-Ludwig Grell, Aurachtal, DT;
Assignee:
Industriewerk Schaeffler OHG, Herzogenaurach, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ; F16C / ;
U.S. Cl.
CPC ...
308202 ; 148 / ; 308D / ;
Abstract
Novel cylindrical rollers for antifriction bearings made of steel with a carbon content of 0.7 to 1.2% by weight, a sorbitic structure and a hardness increased by cold annealing to at least 50 HRC and a novel process for the preparation of said rollers.