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:
Jun. 13, 1989
Filed:
Mar. 22, 1988
Masatake Haruta, Kawanishi, JP;
Tetsuhiko Kobayashi, Ikeda, JP;
Agency of Industrial Science & Technology, Tokyo, JP;
Ministry of International Trade, Tokyo, JP;
Abstract
A composite having ultra-fine gold particles uniformly and strongly immobilized in a deposited state on a metal oxide is obtained by preparing a solution containing the metal oxide as a carrier and a gold compound, adjusting the pH value of the solution to a specific level thereby inducing precipitation and deposition of gold hydroxide or gold on the carrier and, when the precipitate is in the form of gold hydroxide, further, firing the precipitate. The ultra-fine gold particles immobilized on metal oxides are useful as a catalyst for reduction and oxidation, in sensor elements for flammable gases, and as an electrode catalyst.