Carrier core material and carrier for electrophotographic developer and process for producing the same, and electrophotographic developer using the carrier

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United States of America Patent

PATENT NO 8895218
APP PUB NO 20100196818A1
SERIAL NO

12685756

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Abstract

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Employment of a carrier core material for an electrophotographic developer containing 0.8 to 5% by weight of Mg, 0.1 to 1.5% by weight of Ti, 60 to 70% by weight of Fe and 0.2 to 2.5% by weight of Sr and having an amount of Sr dissolved with a pH4 standard solution of 80 to 1000 ppm, a carrier using the core material and a process for producing them, and an electrophotographic developer using the carrier.

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Patent Owner(s)

Patent OwnerAddress
POWDERTECH CO LTD217 TOYOFUTA KASHIWA-SHI CHIBA 2778557 ?2778557

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aga, Koji Kashiwa, JP 48 149
Iwata, Toru Kashiwa, JP 116 1702
Kojima, Takashi Kashiwa, JP 231 1691

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