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Patent US3230525A successfully refreshed from Google Patents.
US3230525A
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Alarm frequency error detector
Assignee: Bendix Corp
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Filing: 1962-05-24
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Granted: 1966-01-18
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Expires: 1982-05-24
Abstract
No abstract record available.
Inventors
- 👤 Sybrand L Anema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A DOPPLER RADAR SYSTEM INCLUDING A FOUR BEAM ANTENNA AND FOUR TRACKING OSCILLATORS FOR FOLLOWING THE DOPPLER SPECTRA IN THE RADAR RETURN, AN ALARM FREQUENCY ERROR DETECTOR COMPRISING: A FIRST MODULATOR PROVIDING THE SUM OF THE FREQUENCIES OF A FIRST PAIR OF SAID OSCILLATORS, A SECOND MODULATOR PROVIDING THE SUM OF THE FREQUENCIES OF THE REMAINING PAIR OF SAID OSCILLATORS,
Claim 2
Dependent Claim
61 words
IN A DOPPLER RADAR SYSTEM INCLUDING A FOUR BEAM ANTENNA AND FOUR TRACKING OSCILLATORS FOR FOLLOWING THE DOPPLER SPECTRA IN THE RADAR RETURN, AN ALARM FREQUENCY ERROR DETECTOR COMPRISING: A FIRST MODULATOR PROVIDING THE SUM OF THE FREQUENCIES OF A FIRST PAIR OF SAID OSCILLATORS, A SECOND MODULATOR PROVIDING THE SUM OF THE FREQUENCIES OF THE REMAINING PAIR OF SAID OSCILLATORS,
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |