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.:

US 8518626 B1

Expired

Date of Patent:

Aug. 27, 2013

Filed:

Mar. 01, 2011

Carrier, method for preparing the carrier, developer using the carrier, developer container, and image forming method and apparatus and process cartridge using the developer

Applicants:

Saori Yamada, Shizuoka, JP;

Minoru Masuda, Shizuoka, JP;

Hisashi Nakajima, Shizuoka, JP;

Kimitoshi Yamaguchi, Shizuoka, JP;

Koichi Sakata, Shizuoka, JP;

Hitoshi Iwatsuki, Shizuoka, JP;

Yutaka Takahashi, Kanagawa, JP;

Toyoaki Tano, Shizuoka, JP;

Mariko Takii, Shizuoka, JP;

Inventors:

Saori Yamada, Shizuoka, JP;

Minoru Masuda, Shizuoka, JP;

Hisashi Nakajima, Shizuoka, JP;

Kimitoshi Yamaguchi, Shizuoka, JP;

Koichi Sakata, Shizuoka, JP;

Hitoshi Iwatsuki, Shizuoka, JP;

Yutaka Takahashi, Kanagawa, JP;

Toyoaki Tano, Shizuoka, JP;

Mariko Takii, Shizuoka, JP;

Assignee:

Ricoh Company, Limited, Tokyo, JP;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Mark F Huff

Assistant Examiner:

Stewart Fraser

Int. Cl.

CPC ...

G03G 9/00 (2006.01);

U.S. Cl.

CPC ...

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 particulate magnetic core material and including a crosslinked material. The crosslinked material is formed by hydrolyzing a copolymer including at least 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 to form a material having a silanol group, and subjecting the material having a silanol group to a condensation reaction using an organic zirconium-containing catalyst.

Find Patent Forward Citations

Yamada, Saori. (2013). Carrier, method for preparing the carrier, developer using the carrier, developer container, and image forming method and apparatus and process cartridge using the developer (U.S. Patent No. 8518626). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8518626

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile