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:
Aug. 16, 2016
Filed:
Apr. 25, 2012
Yoshimichi Ishikawa, Hyogo, JP;
Takuya Kadota, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Kazuoki Fuwa, Hyogo, JP;
Tomohiro Fukao, Osaka, JP;
Tomoharu Miki, Osaka, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Takuya Kadota, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Kazuoki Fuwa, Hyogo, JP;
Tomohiro Fukao, Osaka, JP;
Tomoharu Miki, Osaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner including: toner particles each including a toner base particle and an external additive attached thereon, where the toner base particle includes a binder resin and a colorant, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.10 μm or more but less than 0.50 μm, a standard deviation of the lengths of the long sides of the protrusions is 0.2 or less, a coverage rate of the protrusions on the surface of the toner base particle is 10% to 90%, and the external additive includes fine inorganic particles whose surfaces have been treated with an amino group-containing silane coupling agent.