US2952804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plane concentric field-effect transistors
Assignee: Individual
•
Filing: 1959-08-26
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Granted: 1960-09-13
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Expires: 1979-08-26
Abstract
No abstract record available.
Inventors
- 👤 Franke Joachim Immanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:53
CPC Classifications
H; H10; H10P; H10P95/00; H10D; H10D99/00; H10P10/00; H10P10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |