Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, and image forming apparatus
US12050433B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Aug 24, 2021 |
| Grant date | Jul 30, 2024 |
| Priority date | — |
| Expiry date | Nov 4, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic charge image developing toner includes: a toner particle containing a binder resin; and an external additive including a silica particle having a circularity of more than 0.5 and 0.9 or less and a volume average particle diameter of more than 100 nm and 300 nm or less, in which a total Net intensity NA of an alkali metal element and an alkaline earth metal element in the toner particle measured by fluorescence X-ray analysis is 0.10 kcps or more and 1.20 kcps or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.