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. 27, 2008
Filed:
Apr. 27, 2004
Applicant:
Zenzo Ishijima, Matsudo, JP;
Inventor:
Zenzo Ishijima, Matsudo, JP;
Assignee:
Hitachi Powered Metals Co., Ltd., Matsudo-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F 3/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention proposes a copper-based material with low thermal expansion and high thermal conductivity having good machinability and adaptability to nickel plating and also proposes a method for producing the same. The copper-based material is prepared through the steps of: adding 5 to 60% of iron-based alloy power having a certain value in thermal expansion coefficient into a matrix powder of pure copper phase powder and/or a precipitation hardening copper alloy powder; mixing the powders together; compacting the obtained powder mixture into a green compact and sintering it at temperatures of 400 to 600° C.