US3109758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved tunnel diode
Assignee: AT&T Inc
•
Filing: 1959-10-26
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Granted: 1963-11-05
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Expires: 1979-10-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Batdorf
- 👤 George C Dacey
- 👤 David A Kleinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:08
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/20; H10D62/00; H10D62/10; H10D62/80; H10D62/85; H10D62/854; H10D8/00; H10D8/70; H10D99/00; H10P; H10P95/00; H10P95/50; H10W; H10W99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2798989A
Cited
US2899343A
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US2908871A
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US2919389A
Cited
US2870052A
Cited
US3033714A
Cited
US2924760A
Cited
US2956216A
Cited
US2967793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |