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. 30, 1981
Filed:
Feb. 04, 1980
Applicant:
Inventor:
Larry D Martin, Duncan, OK (US);
Assignee:
Halliburton Company, Duncan, OK (US);
Primary Examiner:
Int. Cl.
CPC ...
C23G / ; C23G / ; C11D / ; C11D / ;
U.S. Cl.
CPC ...
252 87 ; 134-2 ; 134-3 ; 252 / ; 252 82 ; 252142 ; 252148 ; 252149 ; 252151 ; 252156 ; 252158 ;
Abstract
Methods and compositions for removing deposits containing iron sulfide from surfaces with minimal hydrogen sulfide evolution. A composition comprised of a basic aqueous solution of a chelating agent selected from the group consisting of citric acid, oxalic acid, alkylene polyamine polyacetic acids and mixtures of such chelating agents having a pH in the range of from about 8 to about 10 is brought into contact with the deposits for a period of time sufficient for the deposits to be dissolved therein.