Patent US3274538A successfully refreshed from Google Patents.
US3274538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic transducer
Assignee: Individual
•
Filing: 1963-10-30
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Granted: 1966-09-20
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Expires: 1983-10-30
Abstract
No abstract record available.
Inventors
- 👤 Benjamin L Snavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:34
CPC Classifications
G; G10; G10K; G10K13/00; G01; G01S; G01S1/00; G01S1/72; G10K9/00; G10K9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
AN UNDERWATER ACOUSTIC TRANSDUCER COMPRISING, HOLLOW CUP-SHAPED ELEMENTS SECURED TOGETHER TO FORM A CLOSED COMPLIANT SHELL, EACH CUP-SHAPED ELEMENT HAVING A BOTTOM AND SIDE SURFACE, MOTIVATING MEANS IN EACH OF SAID CUP-SHAPED ELEMENTS COUPLED TO SAID BOTTOM SURFACES FOR MOVEMENT THEREOF, SAID SIDE SURFACES BEING OF SUFFICIENT SOFTNESS TO
Claim 2
Dependent Claim
49 words
AN UNDERWATER ACOUSTIC TRANSDUCER COMPRISING, HOLLOW CUP-SHAPED ELEMENTS SECURED TOGETHER TO FORM A CLOSED COMPLIANT SHELL, EACH CUP-SHAPED ELEMENT HAVING A BOTTOM AND SIDE SURFACE, MOTIVATING MEANS IN EACH OF SAID CUP-SHAPED ELEMENTS COUPLED TO SAID BOTTOM SURFACES FOR MOVEMENT THEREOF, SAID SIDE SURFACES BEING OF SUFFICIENT SOFTNESS TO
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |