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. 27, 2026
Filed:
Jan. 17, 2023
Fujifilm Business Innovation Corp., Tokyo, JP;
FUJIFILM Business Innovation Corp., Tokyo, JP;
Abstract
An electrostatic charge image developing toner contains negatively charged toner particles and silica particles added to an exterior of the toner particles, in which in a case where the silica particles are sorted into silica particles (S1) having a circularity of 0.91 or more and silica particles (S2) having a circularity less than 0.91, a mass ratio N/Si of a nitrogen element to a silicon element in a group of the silica particles (S1) is 0.005 or more and 0.50 or less, a mass ratio N/Si of a nitrogen element to a silicon element in a group of the silica particles (S2) is less than 0.005, and an average circularity of the silica particles (S2) is 0.84 or more and less than 0.91.