Patent US2769929A successfully refreshed from Google Patents.
US2769929A
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Electrokinetic transducers
Assignee: Consolidated Electrodynamics Corp
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Filing: 1953-04-15
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Granted: 1956-11-06
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Expires: 1973-04-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward V Hardway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:54
CPC Classifications
H; H04; H04R; H04R23/00; H04R1/00; H04R1/20; H04R1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1669170A
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US1977433A
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US2074417A
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US2596048A
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US2355194A
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US2571124A
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US2535479A
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US2550005A
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US2615940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |