US2509237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiobroadcasting system
Assignee: STC PLC
•
Filing: 1945-02-26
•
Granted: 1950-05-30
•
Expires: 1965-02-26
Abstract
No abstract record available.
Inventors
- 👤 Labin Emile
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:51
CPC Classifications
H; H04; H04J; H04J3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2153202A
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US2181309A
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US2189267A
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US2199179A
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US2262838A
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US2185693A
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US2411547A
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US2425314A
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US2429613A
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US2425315A
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US2425316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |