Magnetic storage medium
Abstract
Abstract A MAGNETIZABLE STORAGE MEMBER IS FORMED FROM A SUBSTRATE AND THIN LAYERS DEPOSITED ON THE SUBSTRATE. THE THIN LAYERS INCLUDE AN ELEMENT HAVING PROPERTIES OF INITIALLY BEING NON-MAGNETIC AND OF BECOMING MAGNETIZABLE WHEN SUBJECTED TO HEAT AT A PARTICULAR ELEVATED TEMPERATURE. A THIN CHEMICALLY INERT LAYER IS DISPOSED BETWEEN THE THIN MANGETIZABLE LAYERS. THE MANGETIZABLE LAYERS MAY BE NICKEL AND THE CHEMICALLY INERT LAYER MAY BE GOLD. THE MAGNETIZABLE STORAGE MEMBER IS PROVIDED WITH MAGNETIC PROPERTIES CORRESPONDING TO THOSE PROVIDED BY A STORAGE MEMBER HAVING IRON OXIDE LAYERS. A HARD, THIN, NON-MAGNETIC PROTECTIVE COATING MAY BE DISPOSED ONTHE STORAGE MEMBER AND MAY BE MADE FROM A SILICONE. THE STORAGE MEMBER IS FORMED FROM THE DIFFERENT LAYERS DISCUSSED ABOVE AND IS THEN BAKED AT THE PARTICULAR ELEVATED TEMPERATURES TO MAKE THE STORAGE MEMBER MAGNETIZABLE. D R A W I N G
Inventors
- 👤 George E Wilhelm
- 👤 Stanley S Nagy
- 👤 Moon T Hahn
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |