US3351900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic transducer for use in dense medium
Assignee: Individual
•
Filing: 1966-01-24
•
Granted: 1967-11-07
•
Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 Yamamoto Yujiro
- 👤 Edwin S Hamberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:56
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/08; B; B63; B63C; B63C11/00; B63C11/02; B63C11/26; H04B; H04B11/00; H04R1/14; B63B; B63B2201/00; B63B2201/02; B63B2203/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
AN ACOUSTIC TRANSDUCER FOR USE UNDER WATER OR OTHER DENSE MEDIUM, COMPRISING: A MOVABLE DIAPHRAGM HAVING TWO OPPOSED RADIATING SURFACES; TRANSDUCER MEANS COOPERATIVELY ASSOCIATED WITH SAID DIAPHRAGM FOR CONVERTING ELECTRICAL ENERGY NTO ACOUSTICAL VIBRATIONS OF SAID DIAPHRAGM, OR VICE VERSA; A PULSATION DAMPER SECURED TO ONE SURFACE OF SAID DIAPHRAGM, INCLUDING MEANS PROVIDING A NUMBER OF RELATIVELY SMALL POCKETS WITHIN WHICH QUANTITIES OF GAS ARE PERMANENTLY ENTRAPPED IN ISOLATION FROM EACH OTHER; AND MEANS SUBJECTING SAID PULSATION DAMPER TO A SUBSTANTIALLY CONSTANT PRESSURE LEVEL IRRESPECTIVE OF VARIATIONS IN THE AMBIENT PRESSURE TO WHICH SAID TRANSDUCER IS SUBJECTED.
References Cited (Backward Citations)
US1732029A
Cited
US2051866A
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US2496060A
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US2977573A
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US2834952A
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US2915738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |