US2615097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for increasing the effectiveness of the transducing field of a magnetic head
Assignee: IIT Research Institute
•
Filing: 1949-01-12
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Granted: 1952-10-21
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Expires: 1969-01-12
Abstract
No abstract record available.
Inventors
- 👤 Camras Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:36
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B5/2652; G11B5/2654; G11B5/2655; G11B5/2657; G11B5/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1255441A
Cited
US2225967A
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US2277305A
Cited
US2431540A
Cited
US2469444A
Cited
US2555110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |