Patent US2458124A successfully refreshed from Google Patents.
US2458124A
Expired / Lapsed
US
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Synchronous frequency broadcasting
Assignee: Individual
•
Filing: 1944-11-14
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Granted: 1949-01-04
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Expires: 1964-11-14
Abstract
No abstract record available.
Inventors
- 👤 Raymond M Wilmotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/65; H04H20/67
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1397093A
Cited
US1403841A
Cited
US1447204A
Cited
US1799976A
Cited
US1858349A
Cited
GB409115A
Cited
US2017126A
Cited
US1987616A
Cited
US2028212A
Cited
GB481841A
Cited
US2155821A
Cited
US2175270A
Cited
US2257917A
Cited
US2284415A
Cited
US2304969A
Cited
US2344813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |