Patent US3202945A successfully refreshed from Google Patents.
US3202945A
Expired / Lapsed
US
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Cavity resonator tuned by means of magnetically controlled coaxial ferrite material located in an auxiliary cavity
Assignee: NEC Corp
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Filing: 1963-04-19
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Granted: 1965-08-24
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Expires: 1983-04-19
Abstract
No abstract record available.
Inventors
- 👤 Tachizawa Hiroshi
- 👤 Kitazume Susumu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:05
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/18; H03B5/1817; H01; H01P; H01P7/00; H01P7/06; H03B2201/00; H03B2201/02; H03B2201/0225; H03B2201/0241; H03B2201/03; H03B2201/036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A CAVITY RESONATOR OF VARIABLE RESONANT FREQUENCY COMPRISING A MAIN RESONANAT CAVITY, AN INPUT AND OUTPUT CIRCUIT FOR SAID MAIN CAVITY, A COUPLING WINDOW FORMED IN ONE WALL OF SAID MAIN CAVITY, AN AUXILLIARY CAVITY TERMINATED AT ONE END THEREOF WITH A CONDUCTOR PLATE AND DIRECTLY COUPLED AT ITS OTHER END TO SAID MAIN CAVITY THROUGH SAID COUPLING WINDOW, A ROD-SHAPED BODY OF FERROMAGNETIC MATERIAL COAXIALLY DISPOSED WITHIN SAID AUXILLARY CAVITY, AND AN EXCITING COIL DISPOSED ABOUT SAID AUXILLIARY CAVITY
Claim 2
Dependent Claim
80 words
A CAVITY RESONATOR OF VARIABLE RESONANT FREQUENCY COMPRISING A MAIN RESONANAT CAVITY, AN INPUT AND OUTPUT CIRCUIT FOR SAID MAIN CAVITY, A COUPLING WINDOW FORMED IN ONE WALL OF SAID MAIN CAVITY, AN AUXILLIARY CAVITY TERMINATED AT ONE END THEREOF WITH A CONDUCTOR PLATE AND DIRECTLY COUPLED AT ITS OTHER END TO SAID MAIN CAVITY THROUGH SAID COUPLING WINDOW, A ROD-SHAPED BODY OF FERROMAGNETIC MATERIAL COAXIALLY DISPOSED WITHIN SAID AUXILLARY CAVITY, AND AN EXCITING COIL DISPOSED ABOUT SAID AUXILLIARY CAVITY
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |