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:
Feb. 26, 1980
Filed:
Feb. 05, 1979
Applicant:
Inventor:
Roy I Kaplan, Naperville, IL (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B08B / ;
U.S. Cl.
CPC ...
134-3 ; 134 28 ; 252 83 ;
Abstract
Iron oxide deposits which are found on heat transfer surfaces can be removed by first contacting these deposits with an aqueous solution of a hydrolyzable tanning extract such as sumach, valonea, or chestnut tannin which conditions the deposits and forms a complex thereof. The thus-formed complex is subsequently removed by treatment with dilute solutions of citric acid.