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. 07, 2010
Filed:
May. 31, 2007
Shinichi Takeshima, Numazu, JP;
Akio Koyama, Yokohama, JP;
Shinichi Takeshima, Numazu, JP;
Akio Koyama, Yokohama, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
The present invention relates to a production process of an exhaust gas purifying catalyst, comprising impregnating a support with a solution containing a metal salt and then drying it to load a particle of the metal salt on the support, (a) wherein a base having a less tendency to adsorb and coordinate to the metal salt particle than ammonia is incorporated into the solution to make the solution basic, and thereby the metal salt particle is caused to have a negative zeta potential; or (b) wherein an acid and a base that adsorbs and coordinates to the metal salt particle are incorporated into the solution to make the solution acidic, and thereby the metal salt particle is caused to have a positive zeta potential.