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. 09, 1977
Filed:
Nov. 07, 1975
Applicant:
Inventors:
Friedrich Krueger, Edingen, DT;
Guenter Schmidt, Ludwigshafen, DT;
Assignee:
Joh. A. Benckiser GmbH, Ludwigshafen (Rhine), DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C02B / ;
U.S. Cl.
CPC ...
260938 ; 252175 ;
Abstract
Scale formation as well as deposition of incrustations in aqueous systems are prevented by the addition of a monophosphoric acid ester of a hydroxy alkyl urea compound or of salts of such an ester. Preferred esters of this type are the esters obtained by reacting hydroxyl alkyl urea compounds with urea phosphate. The esters are highly effective even when they are added in substoichiometric amounts calculated with respect to the scale and hardness causing compounds present in aqueous systems.