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:
Mar. 19, 1991
Filed:
Sep. 25, 1989
Applicant:
Inventor:
Toshi Miyawaki, Kanagawa, JP;
Assignee:
Nihon Parkerizing Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
484259 ; 148262 ;
Abstract
The operation of zinc-nickel phosphate conversion coating of active metals is improved by using phosphating solutions containing formic acid or formate ions. Such solutions can work effectively at low temperatures and provide excellent substrates for paint, particularly that applied by electrodeposition.