Patent US2311032A successfully refreshed from Google Patents.
Patent US3574140A successfully refreshed from Google Patents.
US3574140A
Expired / Lapsed
US
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Epitaxial lead-containing photoconductive materials
Assignee: United States Department of the Navy
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Filing: 1968-02-26
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Granted: 1971-04-06
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Expires: 1988-02-26
Abstract
Abstract A PHOTO-CONDUCTIVE MATERIAL IS FORMED BY TAKING AN EPITAXIAL FILM OF A LEAD SALT OR TIN LEAD SALT ALLOY AND HEATING THE FILM IN THE PRESENCE OF A GASEOUS DOPING AGENT. THE RESULTING PRODUCT EXHIBITS PHOTO-SENSITIVE JUNCTIONS FORMED ALONG CRYSTALLOGRAPHIC DEFECT LINES.
Inventors
- 👤 Richard B Schoolar
- 👤 Harold R Riedl
- 👤 John L Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:47
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/10; H10F77/12; H10F77/127; H10F77/1275; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |