US3057967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer
Assignee: International Business Machines Corp
•
Filing: 1958-05-21
•
Granted: 1962-10-09
•
Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 John B Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:22
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/17; G11B5/1278; G11B5/187; G11B5/245; G11B5/2452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2706752A
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US2786897A
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US2736776A
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US2830130A
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US2682579A
Cited
US2676392A
Cited
US2885488A
Cited
US2704789A
Cited
US2961645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |