Patent US3249947A successfully refreshed from Google Patents.
US3249947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concave reflector with opaque optically reflective coating to prevent concentration of solar energy
Assignee: Unisys Corp
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Filing: 1963-06-17
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Granted: 1966-05-03
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Warren D Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:20
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AN OPTICAL MICROWAVE ANTENNA COMPRISING A CONCAVE REFLECTOR SURFACE, AN OPAGUE OPTICALLY REFLECTIVE COATING APPLIED THERETO, AND A LAYER OF GLASS BEADS BONDED TO THE REFLECTIVE COATING, SAID BEADS HAVING A CROSS SECTION THAT IS LARGE IN RELATION TO THE WAVELENGTH OF VISIBLE LIGHT BUT SMALL IN RELATION TO THE WAVELENGTH OF MICROWAVE ENERGY.
Claim 2
Dependent Claim
54 words
AN OPTICAL MICROWAVE ANTENNA COMPRISING A CONCAVE REFLECTOR SURFACE, AN OPAGUE OPTICALLY REFLECTIVE COATING APPLIED THERETO, AND A LAYER OF GLASS BEADS BONDED TO THE REFLECTIVE COATING, SAID BEADS HAVING A CROSS SECTION THAT IS LARGE IN RELATION TO THE WAVELENGTH OF VISIBLE LIGHT BUT SMALL IN RELATION TO THE WAVELENGTH OF MICROWAVE ENERGY.
References Cited (Backward Citations)
US2706262A
Cited
US3108279A
Cited
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 |