Patent US3189907A successfully refreshed from Google Patents.
US3189907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zone plate radio transmission system
Assignee: Individual
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Filing: 1961-08-11
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Granted: 1965-06-15
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 Lylnan F Van Buskirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:50
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/06; H01Q19/062; H01Q19/065; H01Q15/00; H01Q15/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
IN A TWO-WAY COMMUNICATION SYSTEM ADAPTED FOR TRANSMISSION AND SIMULTANEOUS RECEPTION, A ZONE PLATE, AN ANTENNA FEED ON ONE SIDE OF SAID ZONE PLATE FOR TRANSMITTING HIGH FREQUENCY ENERGY BEAMED AT A REMOTE STATION, SAID ZONE PLATE BEING DISPOSED AT AN ANGLE OF 4K* WITH RESPECT TO THE DIRECTION OF TRANSMISSION, AND AN ANTENNA FEED ON THE OTHER SIDE OF SAID ZONE PLATE FOR SIMULTANEOUSLY RECEIVING HIGH FREQUENCY ENERGY BEAMED AT THE ZONE PLATE FROM THE REMOTE STATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |