Patent US3440500A successfully refreshed from Google Patents.
US3440500A
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US
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High frequency field effect transistor
Assignee: TDK Micronas GmbH
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Filing: 1966-09-26
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Granted: 1969-04-22
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Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Peter J Coppen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:55
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/01; H10W20/021; H10D; H10D99/00; Y; Y10; Y10S; Y10S148/00; Y10S148/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3136897A
Cited
US3209214A
Cited
US3253197A
Cited
US3315096A
Cited
US3275911A
Cited
US3296462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |