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. 06, 1977
Filed:
Nov. 14, 1975
Applicant:
Inventors:
Wun Ten Tai, Pallos Hills, IL (US);
Lawrence A Mura, Homewood, IL (US);
Kenneth G Phillips, River Forest, IL (US);
Edward G Ballweber, Glenwood, IL (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C02B / ;
U.S. Cl.
CPC ...
260929 ; 252 80 ; 252175 ; 260978 ;
Abstract
Phosphate esters including polymers are produced by mixing polyols, such as glycerol, with phosphoric acid material followed by heating under reduced pressures in the presence of inorganic base to temperatures of from about 135.degree. to 165.degree. C. By maintaining reactants under subatmospheric conditions, water is removed as formed. The products have utility as scale suppressant additives to water used in heat exchange and cooling tower applications.