Patent US5511136A successfully refreshed from Google Patents.
Patent US3309705A successfully refreshed from Google Patents.
US3309705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar target for circularly polarized radiation
Assignee: Individual
•
Filing: 1966-06-08
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Granted: 1967-03-14
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Expires: 1986-06-08
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Blank
- 👤 Louis H Sacks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:50
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/18; H01Q15/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A CORNER REFLECTOR TARGET FOR USE WITH CIRCULARLY POLARIZED RADAR BEAMS, COMPRISING A TRIHEDRAL REFLECTOR ARRANGEMENT AND A TRIANGULAR PHASING GRID ASSEMBLY COVERING THE APERTURE THEREOF, THE SAID PHASING GRID ASSEMBLY COMPRISING TWO GRID SUPPORT PLATES OF RADOME MATERIAL, TWO PARALLEL SPACED CONDUCTOR GRIDS SUPPORTED BY THE SAID PLATES, THE SAID GRIDS BEING SPACED APART BY A DIELECTRIC SPACER PLATE AND THE CONDUCTORS OF THE SAID GRIDS BEING SPACED FROM EACH OTHER BY A FRACTION OF A WAVELENGTH AND HAVING A WIDTH A FRACTION OF THE SAID SPACING AND SUCH THAT A CIRCULARLY POLARIZED WAVE PASSING THROUGH THE GRID STRUCTURE AND BEING REFLECTED BACK THERETHROUGH IS POLARIZED IN ITS ORIGINAL SENSE.
Claim 2
Dependent Claim
111 words
A CORNER REFLECTOR TARGET FOR USE WITH CIRCULARLY POLARIZED RADAR BEAMS, COMPRISING A TRIHEDRAL REFLECTOR ARRANGEMENT AND A TRIANGULAR PHASING GRID ASSEMBLY COVERING THE APERTURE THEREOF, THE SAID PHASING GRID ASSEMBLY COMPRISING TWO GRID SUPPORT PLATES OF RADOME MATERIAL, TWO PARALLEL SPACED CONDUCTOR GRIDS SUPPORTED BY THE SAID PLATES, THE SAID GRIDS BEING SPACED APART BY A DIELECTRIC SPACER PLATE AND THE CONDUCTORS OF THE SAID GRIDS BEING SPACED FROM EACH OTHER BY A FRACTION OF A WAVELENGTH AND HAVING A WIDTH A FRACTION OF THE SAID SPACING AND SUCH THAT A CIRCULARLY POLARIZED WAVE PASSING THROUGH THE GRID STRUCTURE AND BEING REFLECTED BACK THERETHROUGH IS POLARIZED IN ITS ORIGINAL SENSE.
References Cited (Backward Citations)
US2786186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |