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US2536030A
Expired / Lapsed
US
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Electromagnetic transducer head
Assignee: IIT Research Institute
•
Filing: 1947-06-06
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Granted: 1951-01-02
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Expires: 1967-06-06
Abstract
No abstract record available.
Inventors
- 👤 Camras Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:59
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/62; G11B5/00; G11B5/127; G11B5/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1466750A
Cited
DE617796C
Cited
GB512766A
Cited
US2272821A
Cited
US2443756A
Cited
US2361753A
Cited
US2432162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |