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:
Apr. 17, 1990
Filed:
May. 23, 1989
Applicant:
Inventor:
Kunio Katsuma, Chiba, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
204 371 ; 204 383 ; 204 387 ; 204 561 ;
Abstract
A fluoroplastic coating is formed on the surface of a substrate, which is selected from the group consisting of zinc, zinc alloys and zinc platings, by (i) forming an anodic oxide film on the surface of the substrate by alternating current electrolysis, (ii) dipping the substrate with the anodic oxide film formed therein in a dispersion of a fluoroplastic to coat the anodic oxide film with the fluoroplastic; and (iii) subjecting the thus-coated substrate to a heat treatment at a temperature of at least 170.degree. C.