US2607858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical transducer
Assignee: AT&T Inc
•
Filing: 1948-06-19
•
Granted: 1952-08-19
•
Expires: 1968-06-19
Abstract
No abstract record available.
Inventors
- 👤 Warren P Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:08
CPC Classifications
H; H04; H04R; H04R17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
AN ELECTROACOUSTIC TRANSLATING DEVICE COMPRISING A RADIALLY POLARIZED RING A BARIUM TITANATE, MEANS FOR EXCITING SAID RING TO EFFECT ELECTROSTRICTIVE VIBRATION THEREOF IN THE THICKNESS MODE, AND A DIAPHRAGM COUPLED TO SAID RING FOR ACTUACTION BY VIBRATION THEREOF.
Claim 2
Dependent Claim
38 words
AN ELECTROACOUSTIC TRANSLATING DEVICE COMPRISING A RADIALLY POLARIZED RING A BARIUM TITANATE, MEANS FOR EXCITING SAID RING TO EFFECT ELECTROSTRICTIVE VIBRATION THEREOF IN THE THICKNESS MODE, AND A DIAPHRAGM COUPLED TO SAID RING FOR ACTUACTION BY VIBRATION THEREOF.
References Cited (Backward Citations)
US2224891A
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US2235489A
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US2164638A
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US2363409A
Cited
US2360479A
Cited
US2402515A
Cited
US2486560A
Cited
US2477596A
Cited
US2487962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |