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:
Jun. 01, 1999
Filed:
Apr. 15, 1993
Applicant:
Inventors:
Jean-Georges Brisson, Le Creusot, FR;
Jean Beguinot, Le Creusot, FR;
Assignee:
Creusot Loire Industrie, Puteaux, FR;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428683 ; 428685 ;
Abstract
A block is produced by juxtaposition and joining of at least one plate made of tool steel and of at least one plate made from mild steel. The block is hot rolled and then it is cooled to a temperature below 200.degree. C. The rolled block is tempered at a temperature above 450.degree. C. after cooling. The clad sheet obtained includes a layer made of tool steel having a tempered martensitic structure and containing primary carbides and a fine dispersion of secondary carbides.