Carrier particles bearing insoluble metal salt deposits
US5686217A · kind A · utility
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3References
14Claims
0Family size
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Inventor
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Carrier particles for use in negative electrostatographic developers wherein said particles bear, based on the weight of the carrier particles, from 0.1 to 2 weight percent of deposits selected from the group consisting of (a) strontium carbonate, (b) insoluble metal hydroxides, (c) an insoluble metal hydrated oxide, and (d) mixtures thereof; provided that when the said carrier particles bear a polymeric flurocarbon coating the deposit is other than strontium carbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.