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:
Jan. 11, 2005
Filed:
Apr. 29, 2002
Applicants:
Rinzo Kayano, Muroran, JP;
Eiji Maeda, Muroran, JP;
Inventors:
Rinzo Kayano, Muroran, JP;
Eiji Maeda, Muroran, JP;
Assignee:
The Japan Steel Works, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 3830 ; C22C 3832 ; C22C 3822 ;
U.S. Cl.
CPC ...
Abstract
A hot working die steel contains 0.05-0.25% C, 0.30% or less Si, 0.03% or less Mn, 1.0% or less Ni, 5.0-13.0 % Cr, 2.0% or less Mo, 1.0-8.0% W, 1.0-10.0% Co, 0.003-0.020% B, 0.005-0.050% N, and the balance consisting essentially of Fe and unavoidable impurities. If desired, the hot working die steel may further contain 0.01-1.0% V and 0.01-1.0% of at least one kind selected from Nb and Ta.