US2652554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic storage system for electronic binary digital computers
Assignee: National Research Development Corp UK
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Filing: 1950-02-27
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Granted: 1953-09-15
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Expires: 1970-02-27
Abstract
No abstract record available.
Inventors
- 👤 Frederic C Williams
- 👤 John C West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:50
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/28; G06; G06F; G06F13/00; G06F13/38; G06F13/42; G06F13/4204; G06F13/4234; G06F13/4243
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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |