Patent US2585932A successfully refreshed from Google Patents.
US2585932A
Expired / Lapsed
US
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Device for reducing noise in magnetic recording systems
Assignee: MAGNETIC EQUIPMENT Inc
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Filing: 1948-07-29
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Granted: 1952-02-19
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Donald G C Hare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:35
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/255
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE585259C
Cited
GB429987A
Cited
US2263485A
Cited
US2277305A
Cited
US2426838A
Cited
US2431541A
Cited
US2493742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |