US3067422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase distortion correction for high density magnetic recording
Assignee: International Business Machines Corp
•
Filing: 1958-12-24
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Granted: 1962-12-04
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Expires: 1978-12-24
Abstract
No abstract record available.
Inventors
- 👤 Warren A Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10009; G11B20/10046; G11B20/10194
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2148478A
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US2734186A
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US2770797A
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US2782626A
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US2764463A
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US2804605A
Cited
US2813259A
Cited
US2890440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |