Patent US2862199A successfully refreshed from Google Patents.
US2862199A
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US
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Magnetic drum storage system
Assignee: Unisys Corp
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Filing: 1955-05-24
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Granted: 1958-11-25
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Expires: 1975-05-24
Abstract
No abstract record available.
Inventors
- 👤 John E Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:37
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/012; G11B20/00; G11B20/10; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/02; G11B5/024; G11B5/0245; G11B5/09
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) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |