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:
Nov. 16, 2010
Filed:
Feb. 20, 2002
Shigeki Matsuda, Okazaki, JP;
Shin Nishiya, Anjo, JP;
Shigeki Matsuda, Okazaki, JP;
Shin Nishiya, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
A method of forming a film composed of a phosphate compound and a metal on the surface of an article to be treated by performing electrolytic treatment on a metal article to be treated in a phosphate chemical treatment bath. The method includes contacting the metal article having electrical conductivity with the phosphate chemical treatment bath containing phosphate ions and phosphoric acid, nitrate ions, metal ions that form a complex with phosphate ions in the phosphate chemical treatment bath, and metal ions for which the dissolution-precipitation equilibrium potential at which ions dissolved in the phosphate chemical treatment bath are reduced and precipitate as metal is equal to or greater than −830 mV. The (oxidation-reduction potential) of the phosphate chemical treatment bath is maintained at equal to or greater than 700 mV.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile