Patent US2789759A successfully refreshed from Google Patents.
US2789759A
Expired / Lapsed
US
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Electronic digital computing machines
Assignee: National Research Development Corp UK
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Filing: 1950-06-21
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Granted: 1957-04-23
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Expires: 1970-06-21
Abstract
No abstract record available.
Inventors
- 👤 Tootill Geoffrey Colin
- 👤 Williams Frederic Calland
- 👤 Kilburn Tom
- 👤 Thomas Gordon Eric
- 👤 Edwards David Beverley George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:58
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/14; G06F11/1497
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |