US3287692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bender type electroacoustical apparatus
Assignee: Raytheon Co
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Filing: 1963-02-13
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Granted: 1966-11-22
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:47
CPC Classifications
H; H04; H04R; H04R17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
AN ELECTROACOUSTICAL TRANSDUCER COMPRISING A PAIR OF EXPANDER PLATES JOINED INTO A RIGID SURFACE CONTACT OVER THEIR COINCIDENT AREAS, A PAIR OF OPPOSED ELECTRODES, ONE OF EACH ELECTRODES ADHERED TO OPPOSITE OUTER FACES OF SAID PLATES, SAID EXPANDER PLATES AND ELECTRODES HAVING A COMBINED EFFECTIVE VIBRATING MASS WHICH IS A FRACTION OF THE COMBINED ACTUAL MASS OF SAID PLATES AND SAID ELECTRODES, AND A RIGID SHELL RADIATOR ENCLOSING SAID PLATES AND HAVING A CIRCULAR EDGE RIGIDLY SECURED TO AN
Claim 2
Dependent Claim
79 words
AN ELECTROACOUSTICAL TRANSDUCER COMPRISING A PAIR OF EXPANDER PLATES JOINED INTO A RIGID SURFACE CONTACT OVER THEIR COINCIDENT AREAS, A PAIR OF OPPOSED ELECTRODES, ONE OF EACH ELECTRODES ADHERED TO OPPOSITE OUTER FACES OF SAID PLATES, SAID EXPANDER PLATES AND ELECTRODES HAVING A COMBINED EFFECTIVE VIBRATING MASS WHICH IS A FRACTION OF THE COMBINED ACTUAL MASS OF SAID PLATES AND SAID ELECTRODES, AND A RIGID SHELL RADIATOR ENCLOSING SAID PLATES AND HAVING A CIRCULAR EDGE RIGIDLY SECURED TO AN
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |