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:
Jul. 02, 2013
Filed:
Oct. 04, 2010
Yutaka Takahashi, Yokohama, JP;
Minoru Masuda, Numazu, JP;
Kimitoshi Yamaguchi, Numazu, JP;
Hisashi Nakajima, Numazu, JP;
Koichi Sakata, Shizuoka-ken, JP;
Hitoshi Iwatsuki, Numazu, JP;
Saori Yamada, Numazu, JP;
Toyoaki Tano, Numazu, JP;
Mariko Takii, Yokohama, JP;
Yutaka Takahashi, Yokohama, JP;
Minoru Masuda, Numazu, JP;
Kimitoshi Yamaguchi, Numazu, JP;
Hisashi Nakajima, Numazu, JP;
Koichi Sakata, Shizuoka-ken, JP;
Hitoshi Iwatsuki, Numazu, JP;
Saori Yamada, Numazu, JP;
Toyoaki Tano, Numazu, JP;
Mariko Takii, Yokohama, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
The carrier is used for a two-component developer for developing an electrostatic latent image, and includes a particulate magnetic core material; and a cover layer located on a surface of the core material and including a crosslinked material and barium sulfate. The cover layer is formed by applying a coating medium including barium sulfate, a copolymer including a unit (A) having a specific acrylic siloxane structure including a tris(trialkylsiloxy)silanyl group and a unit (B) having a specific acrylic silicone structure having a crosslinking ability, and a condensation reaction catalyst, heating the applied medium to a temperature of from 100° C. to 230° C. so that the copolymer is hydrolyzed to produce a material having a silanol group, and the material and the catalyst are subjected to a condensation reaction to form the crosslinked material.