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:
Oct. 30, 2007
Filed:
Dec. 12, 2002
Koji Aga, Okayama, JP;
Hiroyuki Shimamura, Tokyo, JP;
Koji Aga, Okayama, JP;
Hiroyuki Shimamura, Tokyo, JP;
Mitsui Mining and Smelting Co., Ltd., Tokyo, JP;
Abstract
A black composite oxide particle includes a composite oxide having Fe, Mg and Al as metal components. The particle contains Fe, Mg and Al in amounts of 30 to 55 mass %, 1 to 10 mass %, and 1 to 10 mass %, respectively, and has an atomic ratio of Fe/Feof 0.8 to 10. Also described is a method for producing the black composite oxide particle. In an embodiment, the particle includes a hydrated composite oxide represented by an empirical formula: FeFeMgAlO·nHO. The black composite oxide particle is suitable as a black pigment for a coating material, an ink, toner particles, a rubber and a plastic, and is reduced with respect to the load on the environment and excellent in blackness.