US2769935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic digital computers
Assignee: National Research Development Corp UK
•
Filing: 1950-05-31
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Granted: 1956-11-06
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Expires: 1970-05-31
Abstract
No abstract record available.
Inventors
- 👤 Frederic C Williams
- 👤 Kilburn Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J31/66; G; G11; G11C; G11C11/00; G11C11/21; G11C11/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2093157A
Cited
US2059004A
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US2477008A
Cited
US2476167A
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US2514079A
Cited
US2642550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |