Patent US2901737A successfully refreshed from Google Patents.
US2901737A
Expired / Lapsed
US
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Disk recording compensating devices
Assignee: Unisys Corp
•
Filing: 1955-11-01
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Granted: 1959-08-25
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Expires: 1975-11-01
Abstract
No abstract record available.
Inventors
- 👤 Jr John Reed Stovall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:37
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2096805A
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US2239042A
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US2320429A
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US2326564A
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US2379707A
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US2528457A
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US2811709A
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US2800642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |