Patent US3260990A successfully refreshed from Google Patents.
US3260990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic transducer
Assignee: Dynamics Corp of America
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Filing: 1962-01-03
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Granted: 1966-07-12
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Expires: 1982-01-03
Abstract
No abstract record available.
Inventors
- 👤 Massa Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:37
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
139 words
THE COMBINATION OF AN ELECTROMAGNETIC TRANSDUCER ASSEMBLY FOR PROVIDING RADIATION OF OPPOSITE PHASE FROM A PAIR OF OPPOSITE END SURFACES COMPRISING A BAFFLE STRUCTURE DEFINING A TUBULAR MEMBER HAVING TWO END END OPENINGS, A SEALED TRANSDUCER STRUCTURE POSITIONED AT ONE END SAID END OPENINGS AND MOUNTED FOR FREE VIBRATION THEREWITHIN, A TAPERED REGION ADJACENT EACH END OPENING OF SAID TUBULAR MEMBER WHEREBY THE DIAMETER OF SAID BAFFLE STRUCTURE IS REDUCED OVER A PORTION OF ITS LENGTH INTERMEDIATE SAID END HOUSINGS, MEANS FOLDING OVER THE REDUCED DIAMETER PORTION OF SAID BAFFLE STRUCTURE WHEREBY THE TWO END OPENINGS THEREOF ARE BROUGH INTO APPROXIMATE ALIGNMENT, AND SELECTIVELY ADJUSTABLE MEANS FOR VARYING THE SPACING BETWEEN THE TAPERED REGIONS ADJACENT EACH END OPENING OF SAID TUBULAR MEMBER TO ENABLE THE SELECTIVE TUNING OF THE BAFFLE STRUCTURE TO THE OPERATING FREQUENCY OF THE TRANDUCER STRUCTURE.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |