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:
Aug. 25, 1987
Filed:
Mar. 05, 1985
Applicant:
Inventors:
Stuart W Longworth, Warrington, GB;
John G Baker, Cheshire, GB;
Assignee:
Dearborn Chemicals Limited, Widnes, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
422 16 ; 25238952 ; 252390 ; 422 14 ; 422 19 ;
Abstract
Corrosion in liquid, especially aqueous systems such as cooling systems, is controlled by the addition of a vegetable tannin or a derivative thereof, a triazole, a hydroxylamine, a neutralizing amine, and a water soluble salt of a Group II metal, in particular zinc, magnesium or calcium.