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:
Sep. 16, 1997
Filed:
Oct. 23, 1992
Applicant:
Inventors:
Noriaki Yoshitake, Kanagawa-ken, JP;
Kensuke Mizuno, Kanagawa-ken, JP;
Takao Ogino, Kanagawa-ken, JP;
Assignee:
Henkel Corporation, Plymouth Meeting, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ; C23C / ;
U.S. Cl.
CPC ...
427305 ; 427318 ; 427328 ; 427405 ; 427436 ; 148267 ; 148268 ;
Abstract
The protection against black and white rust on zinciferous surfaces by a conventional chromating treatment is improved by drying into place on the zinciferous surface before chromating a pre-treatment composition that contains hexavalent chromium ion plus one or more salts of nickel and cobalt, in an amount to produce an add-on of 0.5 to 100 mg/m.sup.2 of metal.