US3671232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic member useful as a lithographic master
Assignee: AB Dick Co
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Filing: 1970-11-23
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Granted: 1972-06-20
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Expires: 1990-11-23
Abstract
Abstract A METHOD OF MAKING A LITHOGRAPHIC MASTER USING A PHOTOCONDUCTIVE MEMBER WHICH CONTAINS INFRARED ABSORBING CARBON BLACK IN THE PHOTOCONDUCTIVE COATING IN THE AMOUNT RANGING FROM 0.25% TO 1% BY WEIGHT OF THE PHOTOCONDUCTIVE PIGMENT. THE METHOD CALLS FOR FUSING THE INK RECEPTIVE THERMOLPLASTIC RESIN POWDER BY INFRARED RADIATION. THE PRESENCE OF CARBON BLACK IN THE FACE COAT ACHIEVES A UNIQUE BALANCE IN THE AMOUNT OF HEAT NECESSARY TO FUSE THE FINE LINES WHICH FORM A PART OF THE IMAGE, WITHOUT FUSING THE SPURIOUS TONER PARTICLES DEPOSITED IN THE BACKGROUND WHICH CAN LATER PHYSICALLY BE REMOVED.
Inventors
- 👤 Charles A Kumins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/14; G03G5/142
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |