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. 21, 2026
Filed:
Mar. 25, 2023
Fujifilm Business Innovation Corp., Tokyo, JP;
Tomoaki Tanaka, Kanagawa, JP;
Kotaro Yoshihara, Kanagawa, JP;
Asafumi Fujita, Kanagawa, JP;
Teppei Yawada, Kanagawa, JP;
Tsuyoshi Murakami, Kanagawa, JP;
FUJIFILM Business Innovation Corp., Tokyo, JP;
Abstract
An electrostatic charge image developing toner set contains a white toner that contains white toner particles including a binder resin, a white colorant, and a release agent, and a non-white color toner that contains color toner particles including a binder resin, a color colorant, and a release agent, in which, in observation of cross sections of the white toner particles and the color toner particles, in a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the white toner particles to a depth of 1 μm or less with respect to an area of all domains of the release agent present in a cross section of the white toner particles is represented by W, and a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the color toner particles to a depth of 1 μm or less with respect to an area of all domains of the release agent present in a cross section of the color toner particles is represented by W, a relationship of W<Wis satisfied.