Patent US3249946A successfully refreshed from Google Patents.
US3249946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency independent antenna array with constant phase center spacing
Assignee: Lockheed Martin Corp
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Filing: 1963-03-25
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Granted: 1966-05-03
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Edward R Flanagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:52
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/10; H01Q21/00; H01Q21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A TWIN ANTENNA ARRAY FOR THE TRANSMISSION OR RECEPTION OF RADIANT ELECTRICAL WAVE ENERGY COMPRISING: A SUPPORT MEMBER, TWO GROUND PLANE MEMBERS MOUNTED ON THE SUPPORT MEMBER AT A CONVERGING ANGLE, TWO PHYSICALLY SEPARATED TRINAGULAR SHAPED ANTENNAS MOUNTED AT EQUAL ANGLES OF INCLINATION ON THE GROUND PLANE MEMBERS, RESPECTIVELY, IN SUCH A MANNER THAT THE EXTENDED CENTER AXES OF THE ANTENNAS INTERSECT AT A PLANE WHICH BISECTS THE CONVERGING ANGLE BETWEEN THE GROUND PLANE MEMBERS, THE ANTENNAS INCLUDING SUBSTANTIALLY SIMILAR RECIPROCATING CONDUCTING MEMBERS HAVING TAPERING TOOTHED CONFIGURATIONS THAT ARE EFFECTIVELY OPERABLE OVER A WIDE FREQUENCY RANGE DETERMINED BY THE DIMENSIONS OF THE SMALLEST AND LARGEST
Claim 2
Dependent Claim
105 words
A TWIN ANTENNA ARRAY FOR THE TRANSMISSION OR RECEPTION OF RADIANT ELECTRICAL WAVE ENERGY COMPRISING: A SUPPORT MEMBER, TWO GROUND PLANE MEMBERS MOUNTED ON THE SUPPORT MEMBER AT A CONVERGING ANGLE, TWO PHYSICALLY SEPARATED TRINAGULAR SHAPED ANTENNAS MOUNTED AT EQUAL ANGLES OF INCLINATION ON THE GROUND PLANE MEMBERS, RESPECTIVELY, IN SUCH A MANNER THAT THE EXTENDED CENTER AXES OF THE ANTENNAS INTERSECT AT A PLANE WHICH BISECTS THE CONVERGING ANGLE BETWEEN THE GROUND PLANE MEMBERS, THE ANTENNAS INCLUDING SUBSTANTIALLY SIMILAR RECIPROCATING CONDUCTING MEMBERS HAVING TAPERING TOOTHED CONFIGURATIONS THAT ARE EFFECTIVELY OPERABLE OVER A WIDE FREQUENCY RANGE DETERMINED BY THE DIMENSIONS OF THE SMALLEST AND LARGEST
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |