US2647994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control in pulse transmission systems
Assignee: United States Department of the Navy
•
Filing: 1943-12-04
•
Granted: 1953-08-04
•
Expires: 1963-12-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:44
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/34; H; H03; H03J; H03J7/00; H03J7/18; H03J7/30; H03J7/305
Claims Analysis
Total Claims: 0
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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) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |