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:
Dec. 30, 2008
Filed:
Jun. 29, 2005
Junko Nishiyama, Mishima, JP;
Yoshihiro Ogawa, Numazu, JP;
Yusuke Hasegawa, Shizuoka-ken, JP;
Shinichiro Abe, Toride, JP;
Takashige Kasuya, Shizuoka-ken, JP;
Junko Nishiyama, Mishima, JP;
Yoshihiro Ogawa, Numazu, JP;
Yusuke Hasegawa, Shizuoka-ken, JP;
Shinichiro Abe, Toride, JP;
Takashige Kasuya, Shizuoka-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
According to the present invention, a magnetic toner comprising magnetic toner particles including at least a binder resin and magnetic particles is provided, wherein an isoelectric point of the magnetic particles is pH 4.0 or less, in order to provide a magnetic toner stably having an optimum charged amount regardless of environments so that a high-quality image having high blackness can be formed without causing any ghost phenomenon.