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:
Jun. 09, 1992
Filed:
Oct. 26, 1990
Applicant:
Inventors:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ; C01G / ;
U.S. Cl.
CPC ...
423491 ; 423 22 ; 423 38 ; 423 49 ; 423 54 ; 423 87 ; 423 98 ; 423109 ; 423150 ; 423492 ; 423493 ; 423494 ; 423497 ;
Abstract
A metal is dissolved by a method which comprises establishing contact of the metal with a quaternary ammonium compound and a halogenated hydrocarbon or with a quaternary ammonium compound, a halogenated hydrocarbon, and a polar solvent.