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:
Feb. 23, 2016
Filed:
Apr. 25, 2012
Tomohiro Fukao, Osaka, JP;
Takuya Kadota, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Kazuoki Fuwa, Hyogo, JP;
Tomoharu Miki, Osaka, JP;
Tomohiro Fukao, Osaka, JP;
Takuya Kadota, Hyogo, JP;
Yoshihiro Mikuriya, Hyogo, JP;
Tsuyoshi Nozaki, Osaka, JP;
Yoshimichi Ishikawa, Hyogo, JP;
Kazuoki Fuwa, Hyogo, JP;
Tomoharu Miki, Osaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An electrostatic image developing toner including: toner base particles each including a binder resin and a colorant; and an external additive, wherein the toner base particles each have protrusions on a surface thereof, an average of lengths of long sides of the protrusions is 0.1 μm or more but less than 0.5 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 each toner base particle is 10% to 90%, and the external additive includes an external additive (A) which is fine inorganic particles each containing silicone oil.