US2500809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic radio transmitting apparatus
Assignee: Decca Record Co Ltd
•
Filing: 1948-02-19
•
Granted: 1950-03-14
•
Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Fennessy Edward
- 👤 Roberts Graham Estyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:02
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1438567A
Cited
US1836495A
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US2060778A
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US2149808A
Cited
US2323064A
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US2328208A
Cited
US2389786A
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US2470783A
Cited
US2473050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |