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:
Apr. 19, 2011
Filed:
Jan. 21, 2010
Nozomu Komatsu, Mishima, JP;
Koh Ishigami, Mishima, JP;
Hiroyuki Fujikawa, Yokohama, JP;
Kunihiko Nakamura, Gotemba, JP;
Chika Inoue, Berlin, DE;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Tomoko Endo, Odawara, JP;
Nozomu Komatsu, Mishima, JP;
Koh Ishigami, Mishima, JP;
Hiroyuki Fujikawa, Yokohama, JP;
Kunihiko Nakamura, Gotemba, JP;
Chika Inoue, Berlin, DE;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Tomoko Endo, Odawara, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a magnetic carrier giving a high quality image free of density variation without the occurrence of fogging or carrier adhesion and having excellent dot reproducibility even during long-term use. The magnetic carrier has magnetic carrier particles produced by filling pores of porous magnetic core particles with a resin. The magnetic carrier contains 80% by number or more of the magnetic carrier particles satisfying the specific conditions (a) and (b) when 18 straight lines passing through a reference point of a cross section of the magnetic carrier particle are drawn at intervals of 10° in a reflected electron image of the cross section of the magnetic carrier particle photographed by a scanning electron microscope.