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, 1998
Filed:
Mar. 21, 1997
Applicant:
Inventors:
Hiroji Tani, Nagaokakyo, JP;
Naoaki Ogata, Moriyama, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
75373 ; 75370 ;
Abstract
Metal copper powder having excellent dispersibility and small particle diameter deviation is manufactured by adding a reducing agent into a solution containing a copper compound and a dispersion agent to precipitate metal copper powder. The solution may further include ammonia so that copper ammonia complex ions exist in the solution. The dispersion agent is either a phosphate such as pyrophosphate, tripolyphosphate, tetrapolyphosphate, metaphosphate and hexametaphosphate or a water-soluble polymer such as naphthalenesulfonate formaldehyde polycondensate, polyvinyl alcohol, carboxymethylcellulose salts, arabic gum, adipate and polycarboxylate.