US3561268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expendable bathythermograph
Assignee: MASSA DONALD P COHASSET
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Filing: 1969-01-14
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Granted: 1971-02-09
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Expires: 1989-01-14
Abstract
Abstract FREE-FALLING UNDERWATER BODY WHICH HAS A STREAMLINED HULL CHARACTERISTIC THAT CAUSES A STABLE RATE OF FALL THROUGH WATER. THE BODY CONTAINS AN OSCILLATOR CONNECTED TO A PIEZOELECTRIC TRANSMITTING TRANSDUCER FOR RADIATING SOUND WAVES THROUGH THE WATER AT THE OSCILLATOR OUTPUT FREQUENCY. TWO SENSORS ALTER THE OSCILLATOR OUTPUT FREQUENCY AS A FUNCTION OF DEPTH AND TEMPERATURE. A RECEIVER ON THE SURFACE OF THE WATER RECEIVES THE RADIATED SOUND WAVES AND PRINTS OUT THE TEMPERATURE AND DEPTH OF THE WATER THROUGH WHICH THE FALLING BODY IS THEN PASSING.
Inventors
- 👤 Frank Massa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:04
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/024; G01K13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |