US3556954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for obtaining circumferential orientation of magnetic films electroplated on wires
Assignee: General Electric Co
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Filing: 1968-07-29
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Granted: 1971-01-19
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Expires: 1988-07-29
Abstract
Abstract A CIRCUMFERNTIAL MAGNETIC ORIENTATION IS OBTAINED IN A NICKEL-IRON MAGNETIC FILM DEPOSITED UPON A TUNGSTEN WIRE CORE SUCCESSIVELY PLATED WITH GOLD, COPPER AND GOLD LAYERS BY REVOLVING A LINEAR MAGNETIC FIELD GREATER THAN 15 OERSTEDS ABOUT THE WIRE SUBSTRATE DURING THE PLATING OF THE NICKEL-IRON FILM. THE FIELD IS ROTATED AT A SPEED GREATER THAN ABOUT ONE REVOLUTION PER 10 A. LAYER OF MAGNETIC FILM DEPOSITED AND, AFTER DEPOSITION OF THE MAGNETIC FILM TO A THICKNESS LESS THAN 15,000 A., THE MAGNETIC FILM PLATED WIRE IS ANNEALED AT A TEMPERATURE BELOW 400*C. TO DECREASE THE DISPERSION OF ANISOTROPY OF THE FILM IN THE CIRCUMFERENTIAL DIRECTION.
Inventors
- 👤 Fred E Luborsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:01
CPC Classifications
H; H01; H01F; H01F10/00; C; C25; C25D; C25D5/00; C25D5/007; C25D5/009; C25D5/10; C25D5/12; C25D7/00; C25D7/06; C25D7/0607; C25D5/60; C25D5/605; C25D5/611; C25D5/615; C25D5/617
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |