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:
May. 10, 1983
Filed:
Sep. 08, 1980
Applicant:
Inventor:
Robert R Grinstead, Walnut Creek, CA (US);
Assignee:
The Dow Chemical Co., Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B / ; C07F / ; C01G / ;
U.S. Cl.
CPC ...
252189 ; 7510 / ; 2604 / ; 252182 ; 423139 ; 436 76 ; 436 84 ; 436 80 ;
Abstract
An extractant system comprising (a) a high molecular weight alkylaromatic sulfonic acid and (b) a chelating amine having a pKa of from about 3 to about 9 in a solvent which is essentially immiscible with water, said system being useful for the selective extraction of desired metals, e.g., cobalt, nickel or copper ions from aqueous acidic ore leach liquors.
Grinstead, Robert. (1983). Metallurgical extractant system (U.S. Patent No. 4382872). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4382872
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile