US4123267A
Expired / Lapsed
US
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Photoconductive element having a barrier layer of aluminum hydroxyoxide
Assignee: 3M Co
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Filing: 1977-06-27
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Granted: 1978-10-31
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Expires: 1997-06-27
Abstract
Abstract A photoconductive element consisting essentially of an electrically conductive substrate, a barrier layer of aluminum hydroxyoxide crystallites on said substrate and a continuous photoconductive layer over said barrier layer.
Inventors
- 👤 Gary L. Dorer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
A photoconductive element consisting essentially of (a) an electrically conductive substrate, (b) a layer of aluminum hydroxyoxide crystallites on said substrate, and (c) a continuous photoconductive layer over said layer of crystallites wherein said photoconductive layer is selected from selenium, selenium compounds and alloys of selenium.
Claim 2
Dependent Claim
46 words
A photoconductive element consisting essentially of (a) an electrically conductive substrate, (b) a layer of aluminum hydroxyoxide crystallites on said substrate, and (c) a continuous photoconductive layer over said layer of crystallites wherein said photoconductive layer is selected from selenium, selenium compounds and alloys of selenium.
Claim 3
Dependent Claim
14 words
A photoconductive element in accordance with claim 1 wherein said photoconductive layer is selenium.
Claim 4
Dependent Claim
17 words
A photoconductive element in accordance with claim 1 wherein said photoconductive layer is an alloy of selenium.
Claim 5
Dependent Claim
25 words
A photoconductive element in accordance with claim 3 wherein said alloy comprises at least about 99.5% by weight selenium, the remainder comprising arsenic or tellurium.
Claim 6
Dependent Claim
24 words
A photoconductive element in accordance with claim 4 wherein said alloy comprises at least about 99.5% by weight selenium and the remainder is arsenic.
Claim 7
Dependent Claim
17 words
A photoconductive element in accordance with claim 1 wherein said photoconductive element is a compound of selenium.
Claim 8
Dependent Claim
17 words
A photoconductive element in accordance with claim 6 wherein said compound is As 2 Se 3 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |