US3025438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field effect transistor
Assignee: TUNGSOL ELECTRIC Inc
•
Filing: 1959-09-18
•
Granted: 1962-03-13
•
Expires: 1979-09-18
Abstract
No abstract record available.
Inventors
- 👤 Horst A R Wegener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:29
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/80; H10D10/00; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10D62/00; H10D62/10; H10D84/00; H10D84/80; H10D84/86; H10D99/00; H10N; H10N70/00; H10P; H10P95/00; H10P95/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2790037A
Cited
US2869054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |