US3196444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interrogating antenna with control radiation
Assignee: BAE Systems Electronics Ltd
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Filing: 1961-11-17
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Granted: 1965-07-20
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Expires: 1981-11-17
Abstract
No abstract record available.
Inventors
- 👤 Shinn Douglas Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:33
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/02; G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/762; H01Q5/00; H01Q5/40; H01Q5/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN AERIAL SYSTEM FOR USE IN A SECONDARY RADAR SYSTEM, SAID SERIAL SYSTEM COMPRISING A FOCUSSING SERIAL ELEMENT; AN INTERROGATING DIRECTIONAL SERIAL AT THE FOCUS OF AND DIRECTED TOWARD SAID ELEMENT TO RADIATE AN INTERROGATING FIELD COMPONENT; TWO CONTROL DIRECTIONAL AERIALS FOR RADIATING A CONTROL FIELD COMPONENT, THE CONTROL DIRECTIONAL AERIALS BEING DIRECTED TOWARD SAID ELEMENT AND SYMMETRICALLY OFFSET FROM THE AXIS THEREOF TO BE DEFOCUSSED WITH RESPECT TO THE ELEMENT BY THE SAME AMOUNT; AND MEANS FOR FEEDING THE TWO CONTROL DIRECTIONAL SERIALS IN PLACE OPPOSITION AND FOR MODULATING THE CONTROL FIELD COMPONENT DIFFERENTLY FROM THE INTERROGATING FIELD COMPONENT.
Claim 2
Dependent Claim
100 words
AN AERIAL SYSTEM FOR USE IN A SECONDARY RADAR SYSTEM, SAID SERIAL SYSTEM COMPRISING A FOCUSSING SERIAL ELEMENT; AN INTERROGATING DIRECTIONAL SERIAL AT THE FOCUS OF AND DIRECTED TOWARD SAID ELEMENT TO RADIATE AN INTERROGATING FIELD COMPONENT; TWO CONTROL DIRECTIONAL AERIALS FOR RADIATING A CONTROL FIELD COMPONENT, THE CONTROL DIRECTIONAL AERIALS BEING DIRECTED TOWARD SAID ELEMENT AND SYMMETRICALLY OFFSET FROM THE AXIS THEREOF TO BE DEFOCUSSED WITH RESPECT TO THE ELEMENT BY THE SAME AMOUNT; AND MEANS FOR FEEDING THE TWO CONTROL DIRECTIONAL SERIALS IN PLACE OPPOSITION AND FOR MODULATING THE CONTROL FIELD COMPONENT DIFFERENTLY FROM THE INTERROGATING FIELD COMPONENT.
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |