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:
Jan. 13, 1976
Filed:
Dec. 18, 1974
Applicant:
Inventors:
Edward H Chang, Burnsville, MN (US);
Oliver D Nichols, Burnsville, MN (US);
Assignee:
Fremont Industries, Inc., Shakopee, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23G / ;
U.S. Cl.
CPC ...
156 20 ; 134-3 ; 134 23 ; 252 794 ;
Abstract
A formulation for the surface treatment of metal articles wherein the article to be treated is immersed and agitated in a working solution of the formulation. The formulation consists essentially of the esterification reaction product of phosphoric acid based upon P.sub.2 O.sub.5 with an alkylphenol of either octylphenoxypoly (ethyleneoxy) ethanol or nonylphenoxypoly (ethyleneoxy) ethanol, and wherein the mol ratio of the reactants ranges from between about 1:3 up to about 3:4 of P.sub.2 O.sub.5 to alkylphenol.