US3816288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow discharge technique for the preparation of electrophotographic plates
Assignee: Xerox Corp
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Filing: 1971-10-21
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Granted: 1974-06-11
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Expires: 1991-10-21
Abstract
Abstract A method of preparing an electrophotographic plate having a metallic oxide coating interface is disclosed. The preparation of the plate involves subjecting a metallic substrate to a glow discharge process by utilizing it as the anode electrode in the electrical discharge process. The glow discharge effects oxidation of the surface as well as heating the substrate to a temperature at which vacuum evaporation of the photoconductive layer takes place. The process has particular utility because the glow discharge - oxidation process effectively cleans the metallic substrate thereby preparing it for the subsequent evaporation of a pure photoconductive material such as selenium.
Inventors
- 👤 G Lubicz
- 👤 A Bills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/32009; H01J37/32422; C; C23; C23C; C23C28/00; C23C8/00; C23C8/06; C23C8/36; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/10; G03G5/104; G03G5/14; G03G5/142; G03G5/144
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
The process of claim 1 wherein the glow discharge is continued for a time sufficient to form a metallic oxide layer of between about 15 and about 55 angstroms.
Claim 2
Dependent Claim
42 words
The process of claim 1 in which the glow discharge is carried out at pressures of from about 30 to 50 microns of Hg to effect a formation of amorphous aluminum oxide having a thickness of from about 10 to 55 angstroms.
Claim 3
Dependent Claim
15 words
The process of claim 1 in which the photoconductive material comprises selenium and selenium alloys.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |