Patent EP0124428A1 successfully refreshed from Google Patents.
US3966470A
Expired / Lapsed
US
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Photo-conductive coating containing Ge, S, and Pb or Sn
Assignee: Pentacon GmbH Foto und Feinwerktechnik
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Filing: 1974-06-03
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Granted: 1976-06-29
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Expires: 1994-06-03
Abstract
Abstract As a photoconductive material there is provided a carrier having a coating thereon of a germanium-sulphur-lead alloy or a germanium-sulphur-tin alloy.
Inventors
- 👤 Adalbert Feltz
- 👤 Johannes Opfermann
- 👤 Bernd Voigt
- 👤 Walter Seliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:47
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A photoconductive material comprising a carrier and a homogeneous, vitreous coating thereon, said coating comprising an alloy consisting essentially of germanium, sulphur and a further constituent selected from the group consisting of lead and tin, the thickness of said coating being between 0.2 and 200μm, the atom percent of Ge being between 17.7 and 42.5 and that of S between 54.5 and 61 when lead is used, the atom percent of Ge being between 21 and 41 and that of S between 53 and 61 when tin is used, the atom percent of the lead being between 0.1 and 24.5 and that of the tin between 0.1 and 22.
Claim 2
Dependent Claim
109 words
A photoconductive material comprising a carrier and a homogeneous, vitreous coating thereon, said coating comprising an alloy consisting essentially of germanium, sulphur and a further constituent selected from the group consisting of lead and tin, the thickness of said coating being between 0.2 and 200μm, the atom percent of Ge being between 17.7 and 42.5 and that of S between 54.5 and 61 when lead is used, the atom percent of Ge being between 21 and 41 and that of S between 53 and 61 when tin is used, the atom percent of the lead being between 0.1 and 24.5 and that of the tin between 0.1 and 22.
Claim 3
Dependent Claim
51 words
A photoconductive cell comprising a quartz carrier and a homogeneous, vitreous coating thereon comprising about 20.0 atom per cent germanium, about 56.5 atom per cent sulphur and about 23.5 atom per cent lead, and metal electrodes in contact with said coating, the thickness of said coating being between 0.2 and 200μm.
Claim 4
Dependent Claim
51 words
A photoconductive cell comprising a quartz carrier and a homogeneous, vitreous coating thereon comprising about 20.0 atom per cent germanium, about 56.5 atom per cent sulphur and about 23.5 atom per cent lead, and metal electrodes in contact with said coating, the thickness of said coating being between 0.2 and 200μm.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |