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. 31, 1978
Filed:
Apr. 19, 1976
Applicant:
Inventors:
Brian Alfred Cooke, Knotty Green, EN;
Michael Brock, Reading, EN;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
148 / ; 148 315 ;
Abstract
In a continuous process of phosphating ferrous metal surfaces using an acidic zinc phosphate solution comprising chlorate and optionally nitrate ions, ferrous ion is maintained at low concentration by controlled addition of a rapid acting oxidant, for example nitrite ion.