Patent US1208224A successfully refreshed from Google Patents.
Patent US3564521A successfully refreshed from Google Patents.
US3564521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature magnetic head
Assignee: NCR Voyix Corp
•
Filing: 1965-12-06
•
Granted: 1971-02-16
•
Expires: 1985-12-06
Abstract
Abstract A MINIATURE MAGNETIC TRANSDUCER HEAD ASSEMBLY COMPRISING A NON-MAGNETIC SUBSTRATE PROVIDED WITH RECCESS HAVING A CONTROLLED DEPTH AND SHAPED ACCORDING, AT LEAST, TO THE SHAPE OF THE POLE PIECES OF THE HEAD. THE POLE PIECES ARE FORMED BY DEPOSITION OF MAGNETIC MATERIAL IN THE RECESSES. A THIN WALL OF THE SUBSTRATE WHICH SEPARATES THE PRECESSES PROVIDES THE TRANSDUCING GAP BETWEEN THE POLE PIECES. A MAGNETIC CONNECTING PATH BETWEEN THE POLE PIECES IS ALSO PROVIDED ON THE SUBSTRATE TO FORM TWO PARALLEL OUTER LEGS AND A CENTER LEG. AN EXCITING WINDING IS WOUND MANUALLY AROUND THE CENTER LEG OR CAN BE FORMED BY DEPOSITION.
Inventors
- 👤 Cebern B Trimble
- 👤 Robert R Skutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:44
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3176; G11B5/3179; G11B5/3183; G11B5/29; G11B5/3103; G11B5/3163; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49043; Y10T29/49044; Y10T29/4906
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |