Patent US2814353A successfully refreshed from Google Patents.
US2814353A
Expired / Lapsed
US
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Transducer with fluid filled diaphragm suspension
Assignee: RCA Corp
•
Filing: 1953-02-26
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Granted: 1957-11-26
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Expires: 1973-02-26
Abstract
No abstract record available.
Inventors
- 👤 Harry F Olson
- 👤 Preston John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:46
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US749360A
Cited
DE337299C
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US1454913A
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US1416582A
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US1372054A
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US1634662A
Cited
US1744032A
Cited
FR622598A
Cited
US1687359A
Cited
US2646853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |