US2910544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer
Assignee: International Business Machines Corp
•
Filing: 1954-03-18
•
Granted: 1959-10-27
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Expires: 1974-03-18
Abstract
No abstract record available.
Inventors
- 👤 Robert D Mcnutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:54
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/56; G11B5/10; G11B5/127; G11B5/17; G11B5/40; G11B5/455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1213150A
Cited
US2144844A
Cited
US2270320A
Cited
US2603682A
Cited
US2644856A
Cited
US2708693A
Cited
US2715654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |