Patent US3241148A successfully refreshed from Google Patents.
US3241148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End loaded planar spiral antenna
Assignee: McDonnell Aircraft Corp
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Filing: 1960-04-04
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Granted: 1966-03-15
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Lechtreck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:44
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/26; H01Q9/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AN ANTENNA COMPRISING A PAIR OF SPIRALLY INTERWOUND, SPACED AND COPLANAR ELEMENTS, ONE OF WHICH HAS A PORTION FORMED INTEGRAL THEREWITH AT ONE END FOR END LOADING AND MATCHING THE ANTENNA, MEANS CONNECTING THE OTHER OF SAID ELEMENTS TO GROUND, AND A COAXIAL CABLE MOUNTED ON SAID OTHER ELEMENT, SAID CABLE HAVING TWO CONDUCTORS, EACH OF WHICH ARE CONNECTED TO A DIFFERENT ONE OF SAID ELEMENTS.
Claim 2
Dependent Claim
66 words
AN ANTENNA COMPRISING A PAIR OF SPIRALLY INTERWOUND, SPACED AND COPLANAR ELEMENTS, ONE OF WHICH HAS A PORTION FORMED INTEGRAL THEREWITH AT ONE END FOR END LOADING AND MATCHING THE ANTENNA, MEANS CONNECTING THE OTHER OF SAID ELEMENTS TO GROUND, AND A COAXIAL CABLE MOUNTED ON SAID OTHER ELEMENT, SAID CABLE HAVING TWO CONDUCTORS, EACH OF WHICH ARE CONNECTED TO A DIFFERENT ONE OF SAID ELEMENTS.
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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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |