US2826715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic storage of information
Assignee: National Research Development Corp UK
•
Filing: 1951-09-05
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Granted: 1958-03-11
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Expires: 1971-09-05
Abstract
No abstract record available.
Inventors
- 👤 Williams Frederic Calland
- 👤 Kilburn Tom
- 👤 Hubert J Crawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:06
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/525; G; G11; G11C; G11C11/00; G11C11/21; G11C11/23; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J31/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2422295A
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US2548789A
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US2642550A
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US2576859A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |