US2354510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control
Assignee: International Standard Electric Corp
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Filing: 1942-07-17
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Granted: 1944-07-25
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Expires: 1962-07-17
Abstract
No abstract record available.
Inventors
- 👤 Earp Charles William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:43
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-07-25 | 1948-01-24 | 1948-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-25 | 1952-01-24 | 1952-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-25 | 1956-01-24 | 1956-07-25 | $7700.00 | Window Closed / Lapsed |