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. 18, 2011
Filed:
Mar. 06, 2009
Yasunori Tabira, Saitama, JP;
Koji Aga, Kashiwa, JP;
Tomoyuki Suwa, Nagareyama, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Powdertech Co., Ltd., Chiba, JP;
Abstract
A carrier core material for an electrophotographic developer including Li ferrite, maghemite, and FeO, wherein a part thereof is substituted with Mn, Li content is 1 to 2.5% by weight, Mn content is 2 to 7.5% by weight, and silicon content is 25 to 10,000 ppm, the following equation (1) is satisfied when respective integrated strengths of spinel crystal structure (110), (210), (211), and (311) faces in X-ray diffraction are respectively I, I, I, and I, a resistivity Rof 50 V across a 6.5 mm gap is 5×10to 7×10Ω, and a resistivity Rof 1,000 V across a 6.5 mm gap is 1×10to 8×10Ω.2<100×()/<14  (1).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile