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:
Oct. 09, 2007
Filed:
Nov. 16, 2004
Hiroyuki Fujikawa, Kanagawa, JP;
Takayuki Itakura, Shizuoka, JP;
Takakuni Kobori, Shizuoka, JP;
Koh Ishigami, Shizuoka, JP;
Nobuyoshi Sugahara, Shizuoka, JP;
Yoshinobu Baba, Kanagawa, JP;
Hirohide Tanikawa, Shizuoka, JP;
Hiroyuki Fujikawa, Kanagawa, JP;
Takayuki Itakura, Shizuoka, JP;
Takakuni Kobori, Shizuoka, JP;
Koh Ishigami, Shizuoka, JP;
Nobuyoshi Sugahara, Shizuoka, JP;
Yoshinobu Baba, Kanagawa, JP;
Hirohide Tanikawa, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetic carrier composed of carrier particles is provided in which each carrier particle has a carrier core including magnetic fine particles and a binder resin with the carrier core surface being coated with a coat material containing a coat resin. In the magnetic carrier, Fatom/Catom and (Fatom/Catom)/(Fcalc/Ccalc) are respectively in specific ranges, wherein Fatom and Catom represent respectively a fluorine element abundance ratio and a carbon element abundance ratio at the magnetic carrier particle surface, and Fcalc and Ccalc represent respectively a fluorine element abundance ratio and a carbon element abundance ratio which are calculable from the molecular structure of the coat resin. In addition, a two-component developer is provoded including the magnetic carrier and a toner having a specific contact angle against water.