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:
Dec. 16, 2008
Filed:
Oct. 14, 2004
Shoichi Fujiyasu, Okayama, JP;
Tomio Hayashi, Okayama, JP;
Koichi Katsuyama, Okayama, JP;
Hiroyuki Shimamura, Tokyo, JP;
Shoichi Fujiyasu, Okayama, JP;
Tomio Hayashi, Okayama, JP;
Koichi Katsuyama, Okayama, JP;
Hiroyuki Shimamura, Tokyo, JP;
Mitsu Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a composite black oxide particle which is composed of oxide of cobalt, copper and manganese. The copper/cobalt molar ratio is 0.1-0.5, and the manganese/cobalt molar ratio is 0.2-1.0. The composite black oxide particle further contains silicon, and the silicon content to the total oxide particle is 0.1-3 mass %. The surface of the composite black oxide particle is coated with aluminum oxide. The Al content in the surface coating to the entire particle is 0.05-3 mass %.