US2796464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical pulse signalling systems
Assignee: National Research Development Corp UK
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Filing: 1954-04-26
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Granted: 1957-06-18
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Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 Clayden David Oswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/062; G; G06; G06F; G06F1/00; G06F1/04; G06F1/12; G11; G11B; G11B20/00; G11B20/10; G11B20/14; G11B20/1403; G11B20/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1786805A
Cited
US2656106A
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US2557086A
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US2552968A
Cited
US2656460A
Cited
US2685082A
Cited
US2679638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |