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:
Nov. 02, 1976
Filed:
Nov. 19, 1975
Applicant:
Inventors:
Eddie C Chou, Arvada, CO (US);
Ranko P Crnojevich, Gretna, LA (US);
Harold Koehler, Fort Madison, IA (US);
Assignee:
Amax Inc., Greenwich, CT (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B / ; C22B / ;
U.S. Cl.
CPC ...
75 / ; 75108 ; 75117 ; 75119 ;
Abstract
An improved method is provided for efficiently precipitating metal powder selected from the group consisting of nickel, cobalt and copper from aqueous solutions using sulfur-free hydrogen at elevated pressure and temperature, the improvement residing in adding to the solution a small but effective amount of a catalyst as an anti-plating agent, said catalyst comprising an alkali metal or ammonium salt of a copolymer of maleic acid anhydride and an unsaturated branched chain aliphatic olefinic hydrocarbon containing 4 to 10 carbon atoms.