US3430249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial dielectric lens
Assignee: ESL Inc
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Filing: 1966-09-08
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Granted: 1969-02-25
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Expires: 1986-09-08
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Franks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:26
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/025; H01Q13/0258; H01Q19/00; H01Q19/06; H01Q19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
AN ARTIFICIAL DIELECTRIC LENS FOR PROVIDING PHASE COMPENSATION FOR ELECTROMAGNETIC WAVES COMPRISING: AT LEAST ONE DISC OF DIELECTRIC MATERIAL OF SUBSTANTIALLY UNIFORM THICKNESS HAVING A DIELECTRIC CONSTANT NEAR UNITY; A PLURALITYOF METALLIC OBSTACLES ON SAID DIELECTRIC DISC, SAID OBSTACLES BEING ARRANGED ON SAID DIELECTRIC DISC IN CONCENTRIC RINGS WITH ONE OF SAID OBSTACLES IN THE CENTER OF SAID DISC; AND THE RADIAL SPACINGS BETWEEN SAID METALLIC OBSTACLES INCREASING RADIALLY OF SAID DIELECTRIC DISC TO DECREASE THE EFFECTIVE DIELECTRIC CONSTANT OF SAID LENS FOR THE RADIAL COMPONENT OF THE ELECTROMAGNETIC WAVES AS A FUNCTION OF THE RADIUS OF SAID LENS.
Claim 2
Dependent Claim
99 words
AN ARTIFICIAL DIELECTRIC LENS FOR PROVIDING PHASE COMPENSATION FOR ELECTROMAGNETIC WAVES COMPRISING: AT LEAST ONE DISC OF DIELECTRIC MATERIAL OF SUBSTANTIALLY UNIFORM THICKNESS HAVING A DIELECTRIC CONSTANT NEAR UNITY; A PLURALITYOF METALLIC OBSTACLES ON SAID DIELECTRIC DISC, SAID OBSTACLES BEING ARRANGED ON SAID DIELECTRIC DISC IN CONCENTRIC RINGS WITH ONE OF SAID OBSTACLES IN THE CENTER OF SAID DISC; AND THE RADIAL SPACINGS BETWEEN SAID METALLIC OBSTACLES INCREASING RADIALLY OF SAID DIELECTRIC DISC TO DECREASE THE EFFECTIVE DIELECTRIC CONSTANT OF SAID LENS FOR THE RADIAL COMPONENT OF THE ELECTROMAGNETIC WAVES AS A FUNCTION OF THE RADIUS OF SAID LENS.
References Cited (Backward Citations)
US3329958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |