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:
May. 09, 1989
Filed:
Jun. 22, 1987
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ; C02F / ;
U.S. Cl.
CPC ...
422 15 ; 106 1412 ; 106 1413 ; 106 1414 ; 106 1831 ; 210699 ; 252493 ; 252180 ; 252181 ; 2523892 ; 252396 ; 422 17 ;
Abstract
Aqueous or partly aqueous systems are treated against the corrosion of metals, especially ferrous metals, in contact therewith, and/or against scale deposition therefrom, by adding to these systems from 0.1 to 50 000 ppm of 2-hydroxyphosphonoacetic acid having the formula I ##STR1## or a water-soluble salt thereof.