Patent US3308458A successfully refreshed from Google Patents.
US3308458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of eliminating the susceptibility to interference of radar devices
Assignee: Siemens and Halske AG
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Filing: 1955-05-16
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Granted: 1967-03-07
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Schulze Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:06
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/52; G01S13/536; G01S13/522; G01S13/524; G01S13/5244; G01S13/58; G01S13/585; G01S13/586
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
RADAR APPARATUS FOR OBSERVING AIR-BORNE TARGETS COMPRISING A TRANSMITTER FOR TRANSMITTING IMPULSES, A LOCKING OSCILLATOR FOR IMPRESSING UPON TRANSMITTED PULSES A FREQUENCY TO SECURE COHERENCE OF THE TRANSMITTED PULSES, A RECEIVER FOR RECEIVING OSCILLATIONS REFLECTED FROM A SELECTED TARGET, SAID REFLECTED OSCILLATIONS BEING AFFECTED BY THE DOPPLER EFFECT OF SAID IMPRESSED PULSES, MEANS IN SAID RECEIVER FOR FILTERING FROM SAID RECEIVED OSCILLATIONS THE DOPPLER FREQUENCY, MEANS FOR AUTOMATICALLY REGULATING SAID LOCKING OSCILLATOR SO AS TO OBTAIN FROM SAID RECEIVED OSCILLATIONS A FIXED DOPPLER FREQUENCY REGARDLESS OF ALTERATIONS IN THE FLIGHT SPEED OF SAID SELECTED TARGET, AND
Claim 2
Dependent Claim
96 words
RADAR APPARATUS FOR OBSERVING AIR-BORNE TARGETS COMPRISING A TRANSMITTER FOR TRANSMITTING IMPULSES, A LOCKING OSCILLATOR FOR IMPRESSING UPON TRANSMITTED PULSES A FREQUENCY TO SECURE COHERENCE OF THE TRANSMITTED PULSES, A RECEIVER FOR RECEIVING OSCILLATIONS REFLECTED FROM A SELECTED TARGET, SAID REFLECTED OSCILLATIONS BEING AFFECTED BY THE DOPPLER EFFECT OF SAID IMPRESSED PULSES, MEANS IN SAID RECEIVER FOR FILTERING FROM SAID RECEIVED OSCILLATIONS THE DOPPLER FREQUENCY, MEANS FOR AUTOMATICALLY REGULATING SAID LOCKING OSCILLATOR SO AS TO OBTAIN FROM SAID RECEIVED OSCILLATIONS A FIXED DOPPLER FREQUENCY REGARDLESS OF ALTERATIONS IN THE FLIGHT SPEED OF SAID SELECTED TARGET, AND
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |