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. 16, 1977
Filed:
Feb. 03, 1976
Applicant:
Inventors:
Theodor Auel, Erftstadt, DT;
Hannsjorg Ulrich, Erftstadt, DT;
Horst-Dieter Wasel-Nielen, Hurth-Hermulheim, DT;
Gero Heymer, Erftstadt, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02B / ; C23F / ;
U.S. Cl.
CPC ...
21 / ; 21 / ; 210 58 ; 252 82 ; 252180 ; 2523 / ;
Abstract
Corrosion and deposition of boiler scale in water-conveying systems are inhibited. To this end the water is admixed with at least one carboxy-alkane compound of phosphorus of the general formula: ##STR1## in which each of the substituents R.sup.1, R.sup.2, R.sup.3, and R.sup.4 stands for hydrogen or an alkyl group having from 1 to 4 carbon atoms, R.sup.5 stands for hydrogen, an OH-group or an alkyl group having from 1 to 3 carbon atoms, and n stands for 0 or 1, or with at least one water-soluble salt thereof.