US2654032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control system
Assignee: International Standard Electric Corp
•
Filing: 1948-09-23
•
Granted: 1953-09-29
•
Expires: 1968-09-23
Abstract
No abstract record available.
Inventors
- 👤 Staschover Leo
- 👤 Heyward A French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03L; H03L7/00; H03L7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2065565A
Cited
US2173301A
Cited
US2377326A
Cited
US2377327A
Cited
US2379689A
Cited
US2445409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |