US2730614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control system
Assignee: Stromberg Carlson Corp
•
Filing: 1950-01-20
•
Granted: 1956-01-10
•
Expires: 1970-01-20
Abstract
No abstract record available.
Inventors
- 👤 John L Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:55
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266517A
Cited
US2261800A
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US2471412A
Cited
US2596227A
Cited
US2503105A
Cited
US2654032A
Cited
US2558100A
Cited
US2560365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |