Patent US5822303A successfully refreshed from Google Patents.
Patent US3354426A successfully refreshed from Google Patents.
US3354426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure gradient hydrophone
Assignee: Dynamics Corp of America
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Filing: 1966-01-28
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Granted: 1967-11-21
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Expires: 1986-01-28
Abstract
No abstract record available.
Inventors
- 👤 Massa Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:39
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0603
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN COMBINATION IN A PRESSURE GRADIENT TRANSDUCER, GENERALLY TUBULAR HOUSING MEANS, END PLATES ON OPPOSITE ENDS OF SAID HOUSING MEANS HAVING GROOVES THEREIN DEFINING RELATIVELY THIN WEBS FOR FLEXURAL SUSPENSION OF CENTRAL PISTON PORTIONS THEREOF, TRANSDUCER MEANS CONPRISING A MULTILAMINAR PLATE ASSEMBLY WITH AT LEAST ONE ELEMENT OF SAID PLATE ASSEMBLY COMPRISING A TRANSDUCER MATERIAL CAPABLE OF CONVERTING OSCILLATORY MECHANICAL BENDING STRESSES TO ALTERNATING ELECTRICAL SIGNALS, MEANS FOR RIGIDLY SUPPORTING ONE END OF SAID MULTILAMINAR PLATE ASSEMBLY AT A POINT WITHIN SAID HOUSING MEANS INTERMEDIATE SAID END PLATES TO POSITION THE OPPOSITE END OF SAID AS-
Claim 2
Dependent Claim
96 words
IN COMBINATION IN A PRESSURE GRADIENT TRANSDUCER, GENERALLY TUBULAR HOUSING MEANS, END PLATES ON OPPOSITE ENDS OF SAID HOUSING MEANS HAVING GROOVES THEREIN DEFINING RELATIVELY THIN WEBS FOR FLEXURAL SUSPENSION OF CENTRAL PISTON PORTIONS THEREOF, TRANSDUCER MEANS CONPRISING A MULTILAMINAR PLATE ASSEMBLY WITH AT LEAST ONE ELEMENT OF SAID PLATE ASSEMBLY COMPRISING A TRANSDUCER MATERIAL CAPABLE OF CONVERTING OSCILLATORY MECHANICAL BENDING STRESSES TO ALTERNATING ELECTRICAL SIGNALS, MEANS FOR RIGIDLY SUPPORTING ONE END OF SAID MULTILAMINAR PLATE ASSEMBLY AT A POINT WITHIN SAID HOUSING MEANS INTERMEDIATE SAID END PLATES TO POSITION THE OPPOSITE END OF SAID AS-
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |