US2810516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic digital computing devices
Assignee: National Research Development Corp UK
•
Filing: 1950-06-01
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Granted: 1957-10-22
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Expires: 1970-06-01
Abstract
No abstract record available.
Inventors
- 👤 Tootill Geoffrey Colin
- 👤 Williams Frederic Calland
- 👤 Kilburn Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:31
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G06F9/34; G06F9/355; G06F9/30145; G11; G11C; G11C11/00; G11C11/21; G11C11/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB600896A
Cited
US2671607A
Cited
US2604262A
Cited
US2701095A
Cited
US2652554A
Cited
US2658670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |