Patent US3225326A successfully refreshed from Google Patents.
US3225326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination tubular baffle with electroacoustic transducer
Assignee: Dynamics Corp of America
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Filing: 1960-06-08
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Granted: 1965-12-21
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Expires: 1980-06-08
Abstract
No abstract record available.
Inventors
- 👤 Massa Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:13
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/04; B06B1/045; G; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE IMPROVEMENT OF AN ELECTROSTATIC TRANSDUCER COMPRISING A SEALED HOUSING FORMED OF A TUBULAR BODY HAVING AN END PLATE AT EACH END THEREOF, A CENTER PLATE HAVING A PAIR OF AXIALLY OPPOSED FACES, A RESILIENT MEANS SUSPENDING SAID CENTER PLATE FOR AXIAL MOVEMENT BETWEEN SAID END PLATES, A FIRST ELECTROMAGNETIC ASSEMBLY HAVING A PORTION MOUNTED ON ONE END PLATE AND A PORTION MOUNTED ON ONE FACE OF SAID CENTER PLATE, A SECOND ELECTROMAGNETIC ASSEMBLY HAVING A PORTION MOUNTED ON THE OTHER END PLATE AND A PORTION MOUNTED ON THE OTHER FACE OF SAID CENTER PLATE, MAGNETIZING COIL MEANS ASSOCIATED WITH EACH ONE OF SAID ELECTROMAGNETIC ASSEMBLIES, SEALED ELECTRICAL TERMINAL MEANS IN SAID HOUSING CONNECTED TO EACH MAGNETIZING COIL MEANS FOR ENABLING ELECTRICAL CONNECTION TO BE ESTABLISHED THROUGH SAID HOUSING TO SAID MAGNETIZING COIL MEANS.
Claim 2
Dependent Claim
134 words
THE IMPROVEMENT OF AN ELECTROSTATIC TRANSDUCER COMPRISING A SEALED HOUSING FORMED OF A TUBULAR BODY HAVING AN END PLATE AT EACH END THEREOF, A CENTER PLATE HAVING A PAIR OF AXIALLY OPPOSED FACES, A RESILIENT MEANS SUSPENDING SAID CENTER PLATE FOR AXIAL MOVEMENT BETWEEN SAID END PLATES, A FIRST ELECTROMAGNETIC ASSEMBLY HAVING A PORTION MOUNTED ON ONE END PLATE AND A PORTION MOUNTED ON ONE FACE OF SAID CENTER PLATE, A SECOND ELECTROMAGNETIC ASSEMBLY HAVING A PORTION MOUNTED ON THE OTHER END PLATE AND A PORTION MOUNTED ON THE OTHER FACE OF SAID CENTER PLATE, MAGNETIZING COIL MEANS ASSOCIATED WITH EACH ONE OF SAID ELECTROMAGNETIC ASSEMBLIES, SEALED ELECTRICAL TERMINAL MEANS IN SAID HOUSING CONNECTED TO EACH MAGNETIZING COIL MEANS FOR ENABLING ELECTRICAL CONNECTION TO BE ESTABLISHED THROUGH SAID HOUSING TO SAID MAGNETIZING COIL MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |