US2939057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unipolar field-effect transistors
Assignee: Individual
•
Filing: 1958-05-27
•
Granted: 1960-05-31
•
Expires: 1978-05-27
Abstract
No abstract record available.
Inventors
- 👤 Teszner Stanislas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:18
CPC Classifications
H; H10; H10D; H10D99/00; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2653374A
Cited
US2648805A
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US2561123A
Cited
US2697269A
Cited
US2744970A
Cited
US2805397A
Cited
US2921265A
Cited
US2869055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |