US3015533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer head
Assignee: IIT Research Institute
•
Filing: 1957-12-11
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Granted: 1962-01-02
•
Expires: 1977-12-11
Abstract
No abstract record available.
Inventors
- 👤 Marvin E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/23; G11B5/33; G11B5/335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2536260A
Cited
US2608621A
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US2768243A
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US2722569A
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US2803708A
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US2855464A
Cited
US2658114A
Cited
US2891236A
Cited
US2889414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |