US3213446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interrogation radar systems
Assignee: AC Cossor Ltd
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Filing: 1962-09-04
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Granted: 1965-10-19
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Expires: 1982-09-04
Abstract
No abstract record available.
Inventors
- 👤 Voyner Zbigniew Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:43
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/762; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A SECONDARY RADAR TRANSMITTER COMPRISING: A CONTROL AERIAL ADAPTED TO RADIATE SUBSTANTIALLY OMNIDIRECTIONALLY; A DIRECTIONAL INTERROGATING AERIAL INCLUDING AN ARRAY OF AERIAL ELEMENTS; MEANS FOR GENERATING RECURRENT GROUPS OF RADIO FREQUENCY PULSES, EACH GROUP INCLUDING AT LEAST ONE CONTROL PULSE AND AT LEAST ONE INTERROGATING PULSE; MEANS FOR FEEDING SAID INTERROGATING PULSES TO ALL THE ELEMENTS OF SAID DIRECTIONAL AERIAL TO PRODUCE A NARROW BEAM OF RADIATION; AND MEANS FOR FEEDING SAID CONTROL PULSES TO SAID CONTROL AERIAL AND SIMULTANEOUSLY TO A PORTION ONLY OF SAID ELEMENTS OF SAID INTERROGATING AERIAL TO PRODUCE A SUBSTNATIALLY OMNIDIRECTIONAL RADIATON PATTERN HAVING A DISCONTINUITY THEREIN IN THE DIRECTION OF THE SAID NARROW BEAM.
Claim 2
Dependent Claim
110 words
A SECONDARY RADAR TRANSMITTER COMPRISING: A CONTROL AERIAL ADAPTED TO RADIATE SUBSTANTIALLY OMNIDIRECTIONALLY; A DIRECTIONAL INTERROGATING AERIAL INCLUDING AN ARRAY OF AERIAL ELEMENTS; MEANS FOR GENERATING RECURRENT GROUPS OF RADIO FREQUENCY PULSES, EACH GROUP INCLUDING AT LEAST ONE CONTROL PULSE AND AT LEAST ONE INTERROGATING PULSE; MEANS FOR FEEDING SAID INTERROGATING PULSES TO ALL THE ELEMENTS OF SAID DIRECTIONAL AERIAL TO PRODUCE A NARROW BEAM OF RADIATION; AND MEANS FOR FEEDING SAID CONTROL PULSES TO SAID CONTROL AERIAL AND SIMULTANEOUSLY TO A PORTION ONLY OF SAID ELEMENTS OF SAID INTERROGATING AERIAL TO PRODUCE A SUBSTNATIALLY OMNIDIRECTIONAL RADIATON PATTERN HAVING A DISCONTINUITY THEREIN IN THE DIRECTION OF THE SAID NARROW BEAM.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |