US3915702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric and electrophotographic pigments comprising derivatives of condensed polycyclic aromatic hydrocarbon aldehydes
Assignee: Xerox Corp
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Filing: 1974-09-25
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Granted: 1975-10-28
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Expires: 1994-09-25
Abstract
Abstract An electrophoretic imaging system which is capable of polychromatic or monochromatic imaging is disclosed, using as at least a portion of the imaging material compounds which are the reaction product of a condensed polycyclic aromatic hydrocarbon aldehyde and certain ketones or amines containing active hydrogen. These compounds may also be used in the preparation of electrophotographic plates for xerography.
Inventors
- 👤 John Alf Bergfjord
- 👤 Steven James Grammatica
- 👤 Richard William Radler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0616; G03G5/0618; G03G5/062
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
A XEROGRAPHIC PLATE COMPRISING A PHOTOCONDUCTIVE LAYER COMPRISING A BINDER MATERIAL HAVING UNIFORMLY DISPERSED THEREIN A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
20 words
A XEROGRAPHIC PLATE COMPRISING A PHOTOCONDUCTIVE LAYER COMPRISING A BINDER MATERIAL HAVING UNIFORMLY DISPERSED THEREIN A COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
38 words
A process for forming a latent xerographic image on a photoconductive layer which comprises electrostatically charging said layer and exposing said layer to a pattern of activating electromagnetic radiation, said photoconductive layer comprising the composition of claim 1.
References Cited (Backward Citations)
US2851495A
Cited
US3246983A
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US3414650A
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US3510419A
Cited
US3546085A
Cited
US3867141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |