US3014099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic transducer
Assignee: Individual
•
Filing: 1955-01-10
•
Granted: 1961-12-19
•
Expires: 1975-01-10
Abstract
No abstract record available.
Inventors
- 👤 Fiala Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:55
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2223496A
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US2400662A
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FR990614A
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US2553150A
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US2645301A
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US2672525A
Cited
US2714134A
Cited
US2761912A
Cited
US2838127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |