Patent US3321765A successfully refreshed from Google Patents.
US3321765A
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Spherical stepped-index microwave luneberg lens
Assignee: BAC AND BRITISH AEROSPACE
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Filing: 1962-09-27
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Granted: 1967-05-23
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Peters Basil
- 👤 Peters Lawrence Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:58
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q15/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A SPHERICAL MICROWAVE LENS WHICH WILL BRING INCOMING WAVES TO A FOCUS ON THE SURFACE OF THE SPHERE COMPRISING IN COMBINATION, A NUMBER OF HOLLOW SPHERICAL SHELLS FITTING WITHIN ONE ANOTHER WITH THE SUCCESSIVE SHELLS HAVING A DESIRED CENTRE SPHERE RATIO IN THE RANGE 0.1 TO 0.4 AND SHELL THICKNESS RATIOS IN THE RANGE FROM 0.02 TO 0.1, AND EACH SHELL WITH A DIELECTRIC CONSTANT DESIGNATED
Claim 2
Dependent Claim
66 words
A SPHERICAL MICROWAVE LENS WHICH WILL BRING INCOMING WAVES TO A FOCUS ON THE SURFACE OF THE SPHERE COMPRISING IN COMBINATION, A NUMBER OF HOLLOW SPHERICAL SHELLS FITTING WITHIN ONE ANOTHER WITH THE SUCCESSIVE SHELLS HAVING A DESIRED CENTRE SPHERE RATIO IN THE RANGE 0.1 TO 0.4 AND SHELL THICKNESS RATIOS IN THE RANGE FROM 0.02 TO 0.1, AND EACH SHELL WITH A DIELECTRIC CONSTANT DESIGNATED
References Cited (Backward Citations)
US2849713A
Cited
US2943358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |