Patent US2835882A successfully refreshed from Google Patents.
US2835882A
Expired / Lapsed
US
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Magnetizable record reading system
Assignee: Unisys Corp
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Filing: 1955-01-27
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Granted: 1958-05-20
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Expires: 1975-01-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph Allan Beek
- 👤 Paul R Gilson
- 👤 Philip R Westlake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:05
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/02; 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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |