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:
Dec. 18, 1984
Filed:
Dec. 29, 1983
Applicant:
Inventors:
Assignee:
National Research Development Corporation, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
C25C / ;
U.S. Cl.
CPC ...
204116 ; 7510 / ; 75120 ;
Abstract
Copper-bearing waste, e.g. brass works flue dust (71% Zn, 31/2% Pb, 14% Cu) was mixed with dendritic zinc, and 80 g of the mixture was leached in 1 liter of 10M hot NaOH for 20 minutes. Dissolution of the copper was successfully held down to under 1%, while all the lead and most of the zinc were dissolved. The dendritic zinc was added as 2 parts by mass per 98 parts of the dust, and had a surface area of 5-10 m.sup.2 /g; it was made by electrolysing a zincate solution.
Pooley, Frederick. (1984). Heavy metal separation from copper-bearing wastes (U.S. Patent No. 4488950). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4488950
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile