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. 05, 1992
Filed:
Apr. 18, 1991
Applicant:
Inventor:
Charles W Finkl, Evanston, IL (US);
Assignee:
A. Finkl & Sons Co., Chicago, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
148333 ; 148335 ; 148334 ; 420107 ; 420108 ; 420109 ;
Abstract
A low alloy hot work implement which retains its fine grain size at elevated working temperatures up to the range of 2,200 degrees F. to 2,250 degrees F. characterized in having a substantial content of N in the range of 75-150 ppm and, preferably, Co in the range of 0.01 to 0.1 the implement being further characterized by relatively narrow ranges of C, Mn, Si, Ni, Cr, Mo, and V, and substantial contents of Al which furnishes the basis for a substantial presence of aluminum nitrides in the final product.