Patent US3564522A successfully refreshed from Google Patents.
US3564522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer with thin film coil and semiconductor switching
Assignee: XEBEC
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Filing: 1966-12-16
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Granted: 1971-02-16
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Expires: 1986-12-16
Abstract
Abstract A MAGNETIC TRANSDUCER HAVING THIN, FLEXIBLE MEMBER WHICH CARRIES AND SUPPORTS TRANSDUCER WINDINGS AND A CORE OF MAGNETIC MATERIAL CARRIED BY THE MEMBER IN COUPLED RELATIONSHIP TO SAID WINDINGS.
Inventors
- 👤 William W Stevens Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:45
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/12; G11B5/00; G11B5/127; G11B5/1272; G11B5/17; G11B5/29; G11B5/31; G11B5/3103; G11B5/48; G11B5/488; G11B5/49; G11B5/4969; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/4906; Y10T29/49066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |