Patent US2550519A successfully refreshed from Google Patents.
US2550519A
Expired / Lapsed
US
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Radio transmitter-receiver station with automatic frequency control
Assignee: FR DES TELECOMM SOC
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Filing: 1947-08-02
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Granted: 1951-04-24
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Expires: 1967-08-02
Abstract
No abstract record available.
Inventors
- 👤 Bataille Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:04
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB551472A
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US2317547A
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US2333719A
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US2419527A
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US2407863A
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US2408826A
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US2408791A
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US2406125A
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US2403011A
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US2379395A
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US2419593A
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US2462294A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |