Patent US3274604A successfully refreshed from Google Patents.
US3274604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-mode simultaneous lobing antenna
Assignee: Individual
•
Filing: 1958-12-12
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Granted: 1966-09-20
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Expires: 1978-12-12
Abstract
No abstract record available.
Inventors
- 👤 Bernard L Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:10
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
IN A RADIO ENERGY OPERATIVE LOCATOR SYSTEM, A RECTANGULAR WAVEGUIDE CAPABLE OF SUPPORTING ENERGY PROPAGATION IN THE TE10, TE20, TE11 AND TM11 MODES, SAID WAVEGUIDE HAVING AN OPEN END ORIENTABLE IN THE DIRECTION OF RECEIPT OF RADIO ENERGY, MEANS SEPARATELY EXTRACTING ENERGY FROM SAID WAVEGUIDE IN DEPENDENCY ON THE TE10, ON THE TE20 AND THE COMBINED TE11 AND TM11 MODES
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |