Patent US1912487A successfully refreshed from Google Patents.
US4096479A
Expired / Lapsed
US
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Radar significant target
Assignee: United States Department of the Navy
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Filing: 1977-04-14
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Granted: 1978-06-20
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Expires: 1997-04-14
Abstract
Abstract A corner reflector and method of making the same by molding individual pas with a plurality of corner reflectors formed in each panel, joining the panels in a desired shape and filling the central portion of the target reflector formed thereby with a buoyant material.
Inventors
- 👤 Lyman F. Van Buskirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:06
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/18; Y; Y10; Y10S; Y10S52/00; Y10S52/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A radar reflective target comprising: at least one panel having inner and outer faces; a plurality of radar reflective corner reflectors formed in the outer face of the panel; each of said plurality of corner reflectors being comprised of intersecting surfaces; a radar reflective coating on the surfaces of said plurality of corner reflectors; said at least one panel comprising the outer surface of a tetrahedron; and the inner portion of said tetrahedron abutting the inner face of said at least one panel being comprised of a buoyant material.
Claim 2
Dependent Claim
89 words
A radar reflective target comprising: at least one panel having inner and outer faces; a plurality of radar reflective corner reflectors formed in the outer face of the panel; each of said plurality of corner reflectors being comprised of intersecting surfaces; a radar reflective coating on the surfaces of said plurality of corner reflectors; said at least one panel comprising the outer surface of a tetrahedron; and the inner portion of said tetrahedron abutting the inner face of said at least one panel being comprised of a buoyant material.
Claim 3
Dependent Claim
44 words
A radar reflective target as set forth in claim 1 wherein; said target is formed in the shape of a cylinder of a desired length; and the inner portion of said cylinder is filled with a buoyant material. said buoyant material comprises polystyrene foam.
Claim 4
Dependent Claim
17 words
A radar reflective target as set forth in claim 2 wherein; said buoyant material comprises polystyrene foam.
Claim 5
Dependent Claim
21 words
A radar reflective target as set forth in claim 1 wherein; said target is formed in the shape of an icosahedron.
Claim 6
Dependent Claim
23 words
A radar reflective target as set forth in claim 4 wherein; the inner portion of the icosahedron is filled with a bouyant material.
Claim 7
Dependent Claim
17 words
A radar reflective target as set forth in claim 5 wherein; said buoyant material comprises polystyrene foam.
References Cited (Backward Citations)
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Cited
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US3039093A
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US3200400A
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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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |