US2853612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control system
Assignee: Unisys Corp
•
Filing: 1954-07-12
•
Granted: 1958-09-23
•
Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Sheldon O Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:13
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02; H03L7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2434294A
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US2450019A
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US2474278A
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US2486001A
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US2467841A
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US2681998A
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US2510095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |