US3341849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-calibrating, self-testing radio altimeter
Assignee: Bendix Corp
•
Filing: 1966-01-26
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Granted: 1967-09-12
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Expires: 1986-01-26
Abstract
No abstract record available.
Inventors
- 👤 Burton L Cordry
- 👤 Brandao Ruy Lopes
- 👤 Nicholas M Papanicolaou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:54
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/345; G01S13/88; G01S13/882; G01S7/00; G01S7/02; G01S7/40; G01S7/4004; G01S7/4021; G01S7/4052; G01S7/4056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN A SELF-CALIBRATING RADIO ALTIMETER OF THE FM-CW TYPE AN IMPROVEMENT COMPRISING MEANS FOR GENERATING A CONTINUOUS RADIO FREQUENCY WAVE, MEANS FOR FREQUENCY MODULATING SAID CONTINUOUS WAVE, A DELAY LINE TO WHICH SAID MODULATED WAVE IS APPLIED, MIXING MEANS FOR PRODUCING A DIFFERENCE FREQUENCY BETWEEN SAID MODULATED WAVE AND DELAY WAVES FROM SAID DELAY LINE, MEANS FOR MEASURING THE FREQUENCY OF SAID DIFFERENCE FREQUENCY,
Claim 2
Dependent Claim
64 words
IN A SELF-CALIBRATING RADIO ALTIMETER OF THE FM-CW TYPE AN IMPROVEMENT COMPRISING MEANS FOR GENERATING A CONTINUOUS RADIO FREQUENCY WAVE, MEANS FOR FREQUENCY MODULATING SAID CONTINUOUS WAVE, A DELAY LINE TO WHICH SAID MODULATED WAVE IS APPLIED, MIXING MEANS FOR PRODUCING A DIFFERENCE FREQUENCY BETWEEN SAID MODULATED WAVE AND DELAY WAVES FROM SAID DELAY LINE, MEANS FOR MEASURING THE FREQUENCY OF SAID DIFFERENCE FREQUENCY,
References Cited (Backward Citations)
US3196437A
Cited
US3248729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |