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:
Sep. 01, 2009
Filed:
Nov. 24, 2004
Applicants:
Takashi Nakai, Niigata, JP;
Kinya Kawase, Niigata, JP;
Inventors:
Takashi Nakai, Niigata, JP;
Kinya Kawase, Niigata, JP;
Assignee:
Mitsubishi Materials PMG Corporation, Niigata, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F 3/02 (2006.01); B22F 3/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hydroxy fatty acid salt having an average particle diameter of from 5 μm to 100 μm with a composition of from 0.3 wt % to 2 wt %, and more preferably, from 0.5 wt % to 2 wt % is added to a raw material powder in powder metallurgy, and worm molding is performed. In addition, a hydroxy fatty acid salt having an average particle diameter of 50 μm or less is attached on a mold in advance, and after that, the warm molding is performed. As a hydroxy fatty acid salt, 12-hydroxy lithium stearate is suitably used.