Patent US2401070A successfully refreshed from Google Patents.
Patent US3218646A successfully refreshed from Google Patents.
US3218646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endfire antenna construction
Assignee: Individual
•
Filing: 1964-02-19
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Granted: 1965-11-16
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Expires: 1984-02-19
Abstract
No abstract record available.
Inventors
- 👤 Hermann W Ehrenspeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:38
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A SLOW WAVE ENDFIRE ANTENNA ARRAY HAVING A FEED, A PARTIAL REFLECTOR AT ONE END OF SAID ARRAY, PLANAR REFLECTOR MEANS AT THE OTHER END OF SAID ARRAY OF A SIZE SUBSTANTIALLY EQUAL TO THE VIRTUAL APERTURE OF SAID ARRAY, AND ADDITIONAL REFLECTOR MEANS OF A SIZE GREATER THAN THE VIRTUAL APERTURE OF SAID ARRAY AT SAID OTHER END OF SAID ARRAY.
Claim 2
Dependent Claim
62 words
A SLOW WAVE ENDFIRE ANTENNA ARRAY HAVING A FEED, A PARTIAL REFLECTOR AT ONE END OF SAID ARRAY, PLANAR REFLECTOR MEANS AT THE OTHER END OF SAID ARRAY OF A SIZE SUBSTANTIALLY EQUAL TO THE VIRTUAL APERTURE OF SAID ARRAY, AND ADDITIONAL REFLECTOR MEANS OF A SIZE GREATER THAN THE VIRTUAL APERTURE OF SAID ARRAY AT SAID OTHER END OF SAID ARRAY.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |