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:
May. 04, 1993
Filed:
Mar. 27, 1991
Shigeru Yasaki, Tokyo, JP;
Yasutaka Yoshino, Tokyo, JP;
Kazunori Ihara, deceased, late of Iwakuni, JP;
Kenji Ohkubo, Hiroshima, JP;
Tokyo Roki Co., Ltd., Kanagawa, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
In a method of manufacturing an exhaust gas purifying catalyst, a carrier of heat-resistant alloy steel containing aluminum is initially prepared as a metallic carrier. A first alumina slurry containing fine particles of hydrated alumina and water is then coated on the surface of the metallic carrier and is in turn dried and calcined so that a first alumina layer may be formed on the surface of the metallic carrier. Thereafter, a second alumina slurry containing gamma-alumina particles, hydrated alumina and water is coated on the surface of the first alumina layer and is in turn dried and calcined so that a second alumina layer may be formed on the surface of the first alumina layer.