Magnetic toner

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9423711
SERIAL NO

14364634

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A magnetic toner including: magnetic toner particles containing a binder resin, a magnetic body, and a release agent; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein the magnetic toner has a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles fixed to the magnetic toner particles' surface that reside in prescribed numerical value ranges; the binder resin contains a styrene resin; the release agent contains a monoester compound or a diester compound; and the softening temperature and softening point of the magnetic toner reside in prescribed temperature ranges.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hasegawa, Yusuke Suntou-gun, JP 120 2441
Hiroko, Shuichi Tokyo, JP 24 828
Magome, Michihisa Mishima, JP 52 1545
Uratani, Kozue Mishima, JP 35 585

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