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:
Feb. 14, 1995
Filed:
Apr. 23, 1992
Yoji Okano, Hiroshima, JP;
Kazuo Fujioka, Hiroshima, JP;
Koso Aoki, Hiroshima, JP;
Hiromitsu Misawa, Hiroshima, JP;
Eiichi Kurita, Hiroshima, JP;
Yasuhiko Fujii, Otake, JP;
Toda Kogyo Corp., Hiroshima, JP;
Abstract
A specific magnetic particle powder is described, which is included in magnetic toners used for magnetic image character recognition (MICR). The magnetic particle powder is a magnetite particle and distinguished by the facts that its residual magnetization is of 12 to 20 emu/g, its Fe.sup.2+ content is of 18.5 to 22.5% by weight, its surface is deposited with Si or Al oxide or mixture thereof and its specific surface area is of 3.5 to 9.5 m.sup.2 /g. The magnetic particle powder used as one component of the magnetic toner enables the formation of fine accurate images and the exact detection of the image.