Toner for developing electrostatic latent image
US11300893B2 · kind B2 · utility
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2References
14Claims
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Key dates
| Filing date | Jul 26, 2018 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Jul 26, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0889
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic latent image includes a plurality of toner particles. Each of the plurality of toner particles includes an additive attached to a surface of the particle, such that, when the plurality of toner particles are measured by X-ray fluorescence (XRF) spectrometry, an X-ray fluorescence intensity of lanthanum [La] (unit: kcps) and an X-ray fluorescence intensity of strontium [Sr] (unit: kcps) measured by the XRF spectrometry of the toner satisfy the following conditions (1) and (2): 0.2 kcps<[La]<2 kcps (1), and 100 kcps<[Sr]<800 kcps (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.