US2552140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency-control system for frequency-modulation television systems
Assignee: Lanteris Space LLC
•
Filing: 1946-09-19
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Granted: 1951-05-08
•
Expires: 1966-09-19
Abstract
No abstract record available.
Inventors
- 👤 Wilson P Boothroyd
- 👤 William H Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:20
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/04; H04N7/045; H03; H03C; H03C3/00; H03C3/02; H03C3/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2279659A
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US2296919A
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US2290517A
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US2305864A
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US2396688A
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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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |