Patent US3389394A successfully refreshed from Google Patents.
US3389394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple frequency antenna
Assignee: Radiation Inc
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Filing: 1965-11-26
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Granted: 1968-06-18
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Expires: 1985-11-26
Abstract
No abstract record available.
Inventors
- 👤 Bernard L Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:57
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/06; H01Q19/08; H01Q5/00; H01Q5/50; H01Q5/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A MULTIPLE FREQUENCY MICROWAVE ANTENNA COMPRISING A WAVEGUIDE, MEANS FOR COUPLING LOW FREQUENCY MICROWAVE SIGNAL ENERGY TO AND FROM SAID WAVEGUIDE, DIELECTRIC GUIDE MEANS DISPOSED IN COEXTENSIVE AND COAXIAL RELATIONSHIP WITH SAID WAVEGUIDE INTERNALLY THEREOF, AND MEANS FOR COUPLING HIGH FREQUENCY MICROWAVE SIGNAL ENERGY TO AND FROM SAID DIELECTRIC GUIDE MEANS.
Claim 2
Dependent Claim
51 words
A MULTIPLE FREQUENCY MICROWAVE ANTENNA COMPRISING A WAVEGUIDE, MEANS FOR COUPLING LOW FREQUENCY MICROWAVE SIGNAL ENERGY TO AND FROM SAID WAVEGUIDE, DIELECTRIC GUIDE MEANS DISPOSED IN COEXTENSIVE AND COAXIAL RELATIONSHIP WITH SAID WAVEGUIDE INTERNALLY THEREOF, AND MEANS FOR COUPLING HIGH FREQUENCY MICROWAVE SIGNAL ENERGY TO AND FROM SAID DIELECTRIC GUIDE MEANS.
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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |