Electrostatic printing
Abstract
Abstract AN IMPROVED LIQUID DEVELOPER FOR A XEROGRAPHIC IMAGE CONSISTING ESSENTIALLY OF FINELY DIVIDED PIGMENT PARTICLES, AN ORGANC DIELECTRIC MATERIAL CAPABLE OF FORMING A RESINOUS COATING, CATING SAID PIGMENT PARTICLES AND INSURING THAT THE PARTICLES HAVE A CHARGE OF SUBSTANTIALLY UNIFORM POLARITY AND MAGNITUDE, AND A CARRIER LIQUID, FOR EXAMPLE, DIMETHYL POLYSIOLOXANE, FOR SAID PIGMENT PARTICLES IN WHICH SAID MATERIAL IS INSOLUBLE. THE IMPROVED LIQUID DEVELOPER IS USED IN DEVELOPING AN ELECTROSTATIC IMAGE ON AN INSULATING SURFACE BY APPLING SAID DEVELOPER TO SAID SURFACE, DEPOSITIONG THE DEVELOPER PATICLES ON SAID SURFACE BY ELECTROSTATIC ATTRACTION THERETO, AND HEATING SAID SURFACE TO FUSE SAID PARTICLES THERETO AND REMOVE THE CARRIER LIQUID.
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Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |