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:
Dec. 17, 1991
Filed:
Aug. 23, 1990
Applicant:
Inventor:
Robert P Kreh, Jessup, MD (US);
Assignee:
W. R. Grace & Co. - Conn, Columbia, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
422 15 ; 210700 ; 25238922 ; 25240022 ; 422 16 ; 562 13 ;
Abstract
A method of inhibiting corrosion of metal surfaces in contact with aqueous solutions and of inhibiting scale formation thereon is provided by introducing and maintaining in the solution certain polyaminopolyphosphonohydroxybenzene sulfonic acid compounds or their alkali or alkaline earth metal salts.