Patent US3669735A successfully refreshed from Google Patents.
US3669735A
Expired / Lapsed
US
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Method for activating a semiconductor electron emitter
Assignee: RCA Corp
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Filing: 1970-09-04
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Granted: 1972-06-13
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Expires: 1990-09-04
Abstract
Abstract THE METHOD FOR ACTIVATING A SEMICONDUCTOR TO MAXIMIZE ITS ELECTRON EMMISSION, ESPECIALLY PHOTOEMISSION, INCLUDES THE STEPS OF SENSITIZING A CLEANDED SEMICONDUCTOR WITH A LEAST A STRONGLY ELECTRONEGATIVE MATERIAL AND A STRONGLY ELECTROPOSITIVE MATERIAL, THEREAFTER HEATING THE SEMICONDUCTOR TO A TEMPERATURE OF BETWEEN ABOUT 470*C. $10*C., AND 590*C$10*C., THEN RESENSITIZING THE SEMICONDUCTOR WITH AT LEAST A STRONGLY ELECTROPOSITIVE MATERIAL.
Inventors
- 👤 Dennis Glendon Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:28
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/02; H01J9/12; H01J9/227
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |