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:
Oct. 28, 2014
Filed:
Oct. 26, 2010
Yuka Zenitani, Kanagawa, JP;
Hideaki Yoshikawa, Kanagawa, JP;
Hiroyoshi Okuno, Kangawa, JP;
Shunsuke Nozaki, Kanagawa, JP;
Shinichiro Kawashima, Kanagawa, JP;
Sakae Takeuchi, Kanagawa, JP;
Yuka Zenitani, Kanagawa, JP;
Hideaki Yoshikawa, Kanagawa, JP;
Hiroyoshi Okuno, Kangawa, JP;
Shunsuke Nozaki, Kanagawa, JP;
Shinichiro Kawashima, Kanagawa, JP;
Sakae Takeuchi, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The invention provides silica particles including primary particles, the primary particles having a volume average particle diameter of from about 80 nm to about 300 nm, a particle size distribution index of from about 1.10 to about 1.40, an average circularity of from about 0.70 to about 0.92, and a circularity distribution index of from about 1.05 to about 1.50, the silica particles including primary particles having a circularity of about 0.95 or greater at a proportion of about 10% or less by number of particles.