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:
Jan. 30, 2007
Filed:
Apr. 18, 2003
Ryuzo Ueno, Nishinomiya, JP;
Masaya Kitayama, Takarazuka, JP;
Kenji Minami, Sennan, JP;
Hiroyuki Wakamori, Sannan-cho, JP;
Nobuhiro Yonetani, Nishinomiya, JP;
Ryuzo Ueno, Nishinomiya, JP;
Masaya Kitayama, Takarazuka, JP;
Kenji Minami, Sennan, JP;
Hiroyuki Wakamori, Sannan-cho, JP;
Nobuhiro Yonetani, Nishinomiya, JP;
Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo, Osaka, JP;
Abstract
The present invention provides a safe charge control agent which exhibits an excellent negative chargeability and excellent dispersibility in and compatibility with binder resins, and is even applicable for col or toners. Specifically, the charge control agent consists of a naphthol derivative of formula [I]: and a salt thereof, and an electrophotographic toner comprising the agent are provided.