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:
Apr. 06, 1982
Filed:
Dec. 20, 1979
Applicant:
Inventors:
Paul R Kruesi, Golden, CO (US);
Veryl H Frahm, Jr, Boulder, CO (US);
Assignee:
Southern Foundry Supply Company, Chattanooga, TN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
75 / ; 75 / ; 75 72 ; 7510 / ; 75114 ; 75117 ;
Abstract
Copper powder is produced from brass by reacting the brass with hydrochloric acid in an oxygen-free atmosphere at a temperature of at least 70.degree. C. until the non-copper metals and impurities of the brass are dissolved, oxidizing at least 10 percent by weight of the resulting copper to copper oxides, grinding the copper-copper oxide to a powder and removing the copper oxides of the powder to obtain a pure copper powder.
Kruesi, Paul. (1982). Process for converting brass scrap to copper powder (U.S. Patent No. 4323390). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4323390
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile