US2730694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplitude recording system utilizing saturable core reactors
Assignee: Ferranti International PLC
•
Filing: 1952-01-29
•
Granted: 1956-01-10
•
Expires: 1972-01-29
Abstract
No abstract record available.
Inventors
- 👤 David T N Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:17
CPC Classifications
H; H04; H04L; H04L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2637018A
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US1150272A
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US1283147A
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US1514753A
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US1708737A
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US1819599A
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US2021099A
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US2129920A
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US2244257A
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US2519513A
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US2639209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |