US3413531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency field effect transistor
Assignee: Ion Physics Corp
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Filing: 1966-09-06
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Granted: 1968-11-26
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Frank A Leith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:41
CPC Classifications
H; H10; H10P; H10P30/00; H10P30/20; H10P30/202; H10P30/204; H10D; H10D99/00; H10P30/21; H10P30/212; H10P30/28; H10W; H10W20/00; H10W20/01; H10W20/021
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |