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US3635705A
Expired / Lapsed
US
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Multilayered halogen-doped selenium photoconductive element
Assignee: Xerox Corp
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Filing: 1969-06-03
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Granted: 1972-01-18
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Expires: 1989-06-03
Abstract
Abstract A xerographic plate having a two-layer photoconductive segment comprising a highly doped vitreous selenium transport layer of from about 20 to 200 microns in thickness and an overlaying control layer of at least about 5 microns thickness which comprises selenium. The plate is characterized by low residual potential as well as exhibiting a minimum ghosting effect.
Inventors
- 👤 Anthony J Ciuffini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:20
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/0433
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
The method of imaging comprising a. providing a xerographic plate having a two-layered photoconductive segment, said segment comprising a first layer 40-80 microns thick comprising vitreous selenium doped with 60-10,000 parts per million of halogen, and an overlaying layer about 5 to 20 microns in thickness comprising undoped selenium, b. forming an electrostatic latent image on said plate, and c. developing said image to make it visible.
Claim 2
Dependent Claim
26 words
The method of claim 3 wherein the latent image is formed by first uniformly charging the surface followed by exposure to a pattern of activating radiation.
Claim 3
Dependent Claim
23 words
The method of claim 3 wherein the halogen dopant comprises chlorine in a concentration of from about 60 to 10,000 parts per million.
References Cited (Backward Citations)
US3041166A
Cited
US3312548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |