US3423701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cavity resonators for microwaves coupled together by variable capacitance diode
Assignee: Patelhold Patenverwertungs and Elektro-Holding AG
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Filing: 1966-08-11
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Granted: 1969-01-21
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Expires: 1986-08-11
Abstract
No abstract record available.
Inventors
- 👤 Alfred Kach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:16
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; H01; H01P; H01P7/00; H01P7/06; H03B; H03B19/00; H03B19/16; H03B19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3278863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |