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:
Jun. 04, 2013
Filed:
Jul. 03, 2009
Masahiro Anno, Tokyo, JP;
Tsuyoshi Uchida, Tokyo, JP;
Masahiko Nakamura, Tokyo, JP;
Kenichi Onaka, Tokyo, JP;
Junya Onishi, Tokyo, JP;
Naoya Tonegawa, Tokyo, JP;
Masahiro Anno, Tokyo, JP;
Tsuyoshi Uchida, Tokyo, JP;
Masahiko Nakamura, Tokyo, JP;
Kenichi Onaka, Tokyo, JP;
Junya Onishi, Tokyo, JP;
Naoya Tonegawa, Tokyo, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
The present invention provides a developer for electrophotography which is superior in property of build up of electrification and in charge stability even in environments of high temperature and high humidity or in an environment of low temperature and low humidity where it is difficult for a developer to retain its electrostatic charge performance, and which can provide an image free from fogging and decrease in density for a long term, that is, a developer for electrophotography containing composite oxide particles which include metal titanate particles containing titanium as a first metal atom and a second metal atom and containing therein 0.009 to 0.350% by weight of a third metal atom selected from the group consisting of the metal atoms belonging to Group 5A of the long form of the periodic table of elements.