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:
Apr. 30, 2013
Filed:
Dec. 29, 2011
Hideaki Yoshikawa, Kanagawa, JP;
Yuka Zenitani, Kanagawa, JP;
Hiroyoshi Okuno, Kanagawa, JP;
Shinichiro Kawashima, Kanagawa, JP;
Yasuo Kadokura, Kanagawa, JP;
Shunsuke Nozaki, Kanagawa, JP;
Sakae Takeuchi, Kanagawa, JP;
Hideaki Yoshikawa, Kanagawa, JP;
Yuka Zenitani, Kanagawa, JP;
Hiroyoshi Okuno, Kanagawa, JP;
Shinichiro Kawashima, Kanagawa, JP;
Yasuo Kadokura, Kanagawa, JP;
Shunsuke Nozaki, Kanagawa, JP;
Sakae Takeuchi, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
Disclosed are silica particles having a volume average particle size of from about 100 nm to about 500 nm, an average circularity degree of from about 0.5 to about 0.85, and an average value of the ratios of circle equivalent diameters Da of the silica particles obtained by a flat image analysis to maximum heights H of the silica particles obtained by a stereoscopic image analysis of more than 1.5 and less than 1.9.