US2585065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined magnetic transducer head and coupling transformer
Assignee: IIT Research Institute
•
Filing: 1947-12-24
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Granted: 1952-02-12
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Expires: 1967-12-24
Abstract
No abstract record available.
Inventors
- 👤 David E Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:00
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/17; G11B5/187; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE622623C
Cited
DE612450C
Cited
DE693664C
Cited
FR880550A
Cited
US2418542A
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US2456767A
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US2539400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |