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:
Sep. 22, 2015
Filed:
Sep. 12, 2012
Yoshihiro Moriya, Shizuoka, JP;
Masahide Yamada, Shizuoka, JP;
Taichi Nemoto, Shizuoka, JP;
Yukiko Nakajima, Kanagawa, JP;
Yoshitaka Yamauchi, Shizuoka, JP;
Keiji Makabe, Shizuoka, JP;
Daiki Yamashita, Kanagawa, JP;
Suzuka Amemori, Shizuoka, JP;
Akiyoshi Sabu, Shizuoka, JP;
Yoshihiro Moriya, Shizuoka, JP;
Masahide Yamada, Shizuoka, JP;
Taichi Nemoto, Shizuoka, JP;
Yukiko Nakajima, Kanagawa, JP;
Yoshitaka Yamauchi, Shizuoka, JP;
Keiji Makabe, Shizuoka, JP;
Daiki Yamashita, Kanagawa, JP;
Suzuka Amemori, Shizuoka, JP;
Akiyoshi Sabu, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An electrophotographic toner including: a binder resin, wherein the binder resin has one glass transition temperature Tg and the glass transition temperature Tg of the binder resin is within 25° C. to 65° C. as measured in second heating with a differential scanning calorimeter at a heating rate of 5° C./min, and wherein a phase image of the binder resin obtained with an atomic force microscope (AFM) of tapping mode contains first phase difference regions and a second phase difference region such that the first phase difference regions are dispersed in the second phase difference region, where the first phase difference regions correspond to greater phase difference regions and the second phase difference region corresponds to a smaller phase difference region when an intermediate value between a maximum value and a minimum value of the phase differences is used as a threshold.