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:
Nov. 04, 2025
Filed:
Jul. 26, 2024
Fujifilm Business Innovation Corp., Tokyo, JP;
Ryo Nagai, Kanagawa, JP;
Yosuke Tsurumi, Kanagawa, JP;
Yasuo Kadokura, Kanagawa, JP;
Moegi Iguchi, Kanagawa, JP;
FUJIFILM Business Innovation Corp., Tokyo, JP;
Abstract
A carrier for electrostatic image development includes: a core material; and a resin coating layer that covers the core material and contains a resin and carbon black particles. The resin coating layer has an average thickness denoted as B μm and contains aggregates of the carbon black particles, the aggregates having equivalent circle diameters denoted as A μm, the aggregates satisfying formula (1) below. In a cross section of the resin coating layer, the ratio of the total area of the aggregates satisfying formula (1) below to the total area of the resin coating layer is 10% or more and 50% or less:0.2×≤0.8× Formula (1).