Patent US3872893A successfully refreshed from Google Patents.
US3133261A
Expired / Lapsed
US
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Depth finder of a vehicle in a fluid
Assignee: Individual
•
Filing: 1961-09-26
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Granted: 1964-05-12
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Expires: 1981-09-26
Abstract
No abstract record available.
Inventors
- 👤 Percy W Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:59
CPC Classifications
H; H04; H04B; H04B11/00; G; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S367/00; Y10S367/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A DEVICE TO BE USED IN A SYSTEM FOR TRACKING THE ELEVATION OF AN OBJECT CARRYING SAID DEVICE AND MOVING WITH RESPECT TO THE EARTH''S SURFACE IN A FLUID WHICH HAS KNOWN PRESSURES FOR VARIOUS ELEVATIONS WHEREIN SAID SYSTEM INCLUDES A RECEIVING STATION HAVING MEANS FOR DETERMING THE FREQUENCY OF SIGNALS RECEIVED, SAID DEVICE COMPRISING MEANS FOR GENERATING A PRESSURE-RESPONSIVE INDICATION HAVING A CHARACTERISTIC WHICH IS REPRESENTATIVE OF THE PRESSURE OF THE FLUID AT THE ELEVATION OF THE OBJECT, MEANS FOR GENERATING A KNOWN FREQUENCY SIGNAL, AND MEANS FOR TRANSMITTING SIGNAL DATA IN SONIC FORM WHICH INCLUDES THE FIXED FREQUENCY SIGNAL AND THE GENERATED PRESSURE-RESPONSIVE
Claim 2
Independent Claim
105 words
A DEVICE TO BE USED IN A SYSTEM FOR TRACKING THE ELEVATION OF AN OBJECT CARRYING SAID DEVICE AND MOVING WITH RESPECT TO THE EARTH''S SURFACE IN A FLUID WHICH HAS KNOWN PRESSURES FOR VARIOUS ELEVATIONS WHEREIN SAID SYSTEM INCLUDES A RECEIVING STATION HAVING MEANS FOR DETERMING THE FREQUENCY OF SIGNALS RECEIVED, SAID DEVICE COMPRISING MEANS FOR GENERATING A PRESSURE-RESPONSIVE INDICATION HAVING A CHARACTERISTIC WHICH IS REPRESENTATIVE OF THE PRESSURE OF THE FLUID AT THE ELEVATION OF THE OBJECT, MEANS FOR GENERATING A KNOWN FREQUENCY SIGNAL, AND MEANS FOR TRANSMITTING SIGNAL DATA IN SONIC FORM WHICH INCLUDES THE FIXED FREQUENCY SIGNAL AND THE GENERATED PRESSURE-RESPONSIVE
References Cited (Backward Citations)
GB435621A
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US2375421A
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US2323317A
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US2871459A
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US2690556A
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US3038143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |