US2521700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator control system
Assignee: STC PLC
•
Filing: 1946-03-09
•
Granted: 1950-09-12
•
Expires: 1966-03-09
Abstract
No abstract record available.
Inventors
- 👤 Sven H M Dodington
- 👤 John A Herbst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02; H03L7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2280019A
Cited
US2374810A
Cited
US2294942A
Cited
US2404640A
Cited
US2387544A
Cited
US2415141A
Cited
US2434294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |