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:
Jan. 13, 2026
Filed:
May. 23, 2022
Fujifilm Business Innovation Corp., Tokyo, JP;
Daisuke Ishizuka, Kanagawa, JP;
Tsutomu Furuta, Kanagawa, JP;
Erina Saito, Kanagawa, JP;
Tomohito Nakajima, Kanagawa, JP;
FUJIFILM Business Innovation Corp., Tokyo, JP;
Abstract
An electrostatic charge image developing toner has toner particles that contain a binder resin, a release agent, and resin particles, in which a loss coefficient tan δ(1%) of the resin particles at a melting temperature Tw of the release agent and a strain of 1% and a loss coefficient tan δ(100%) of the resin particles at the melting temperature Tw of the release agent and a strain of 100% satisfy the following Expression (1) and the following Expression (2):0.02≤tan δ(1%)≤0.5; Expression (1):0.4≤tan δ(100%)−tan δ(1%)≤2.0 Expression (2).