US2796218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic computing devices with subsidiary storage
Assignee: National Research Development Corp UK
•
Filing: 1950-06-21
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Granted: 1957-06-18
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Expires: 1970-06-21
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey C Tootill
- 👤 Williams Frederic Calland
- 👤 Kilburn Tom
- 👤 Thomas Gordon Eric
- 👤 Edwards David Beverley George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:50
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/06; G06F3/0601; G06F3/0668; G06F3/0671; G06F3/0673
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2540654A
Cited
US2604262A
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 |