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. 09, 1982
Filed:
May. 13, 1981
Applicant:
Inventors:
Karl M Hellsten, Odsmal, SE;
Anders W Klingberg, Henan, SE;
Assignee:
Berol Kemi AB, Stenungsund, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03D / ;
U.S. Cl.
CPC ...
209167 ; 209-9 ; 252D / ; 252 61 ; 26050113 ;
Abstract
A process for the froth flotation of calcium phosphate-containing minerals is provided which comprises carrying out the flotation in the presence of an amphoteric flotation agent having the general formula: ##STR1## wherein: R is a hydrocarbon group having from about seven to about twenty-four carbon atoms;