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. 31, 2017
Filed:
Apr. 21, 2016
Keiji Makabe, Shizuoka, JP;
Tsuneyasu Nagatomo, Shizuoka, JP;
Kohsuke Satoh, Shizuoka, JP;
Junichi Watanabe, Shizuoka, JP;
Kenji Yoneda, Shizuoka, JP;
Daichi Hisakuni, Shizuoka, JP;
Keiji Makabe, Shizuoka, JP;
Tsuneyasu Nagatomo, Shizuoka, JP;
Kohsuke Satoh, Shizuoka, JP;
Junichi Watanabe, Shizuoka, JP;
Kenji Yoneda, Shizuoka, JP;
Daichi Hisakuni, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner includes a base particle; and an external additive covering the base particle. The toner includes a tetrahydrofuran (THF)-insoluble component having a glass transition temperature determined from a DSC curve when heated for the second time of from −50° C. to 10° C. and an average circularity not greater than 0.98, and satisfies the following relation:−0.025×≦1.80