US2562943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency control apparatus
Assignee: Unisys Corp
•
Filing: 1943-12-30
•
Granted: 1951-08-07
•
Expires: 1963-12-30
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Pensyl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:20
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1942602A
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US1934400A
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US2041855A
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US2151127A
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US2245627A
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GB537518A
Cited
US2303654A
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US2294942A
Cited
US2337214A
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US2379689A
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US2452575A
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US2404344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |