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. 07, 1979
Filed:
Oct. 25, 1977
Applicant:
Inventors:
Assignee:
Buckman Laboratories, Inc., Memphis, TN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02B / ;
U.S. Cl.
CPC ...
252180 ; 252 82 ; 252 86 ; 252181 ; 2523 / ; 252396 ; 210 58 ; 422 15 ;
Abstract
Dimethylaminomethylenebis(phosphonic acid) is prepared by reacting dimethylformamide with phosphorous trichloride and treating the reaction mixture with alcohols or glycols and water. The phosphonic acid is combined with water soluble carboxylic acid polymers for use as a corrosion and scale inhibitor in aqueous systems. These compositions may also be combined with phosphorous acid and water soluble zinc salts.