Ferrimagnetic glass-ceramics
Abstract
Abstract FERRIMAGNETIC GLASS-CERAMICS PREPARED FROM THERMALLY AND SPONTANEOUSLY CRYSTALLIZABLE COMPOSITIONS BASED ON A SIMPLE TERNARY GLASS SYSTEM FE2O3-LI2O-SIO2, WHEREIN THE PREDOMINANT CRYSTALLINE PHASE IS LITHIUM FERRITE (LIFE5O8). THE ADDITION OF MINOR AMOUNTS OF MODIFIERS OR NUCLEANTS, SUCH AS ZNO, TO THE BASIC TERNARY COMPOSITION OF THIS INVENTION PROVIDES A GREATER DEGREE OF CONTROL OVER THE CRYSTALLIZATION OF THE THERMALLY CRYSTALLIZABLE COMPOSITIONS AND FURTHER ENHANCES THE DEVELOPMENT AND GROWTH OF FERRITE CRYSTALS AND THE MAGNETIC PROPERTIES OF THE FERRITES. THE GLASS-CERAMICS PREPARED FROM THE SIMPLE GASS SYSTEMS AND BY THE METHODS OF THIS INVENTION HAVE MAGNETIC PROPERTIES WHICH MAKE THEM USEFUL IN THE MANUFACTURE OF COMPUTER MEMORY CORES, RADIO COILS, PULSE TRANSFORMERS AND OTHER ASSORTED ELECTRONIC DEVICES WHICH ARE DESIGNED TO OPERATE AT MICROWAVE FREQUENCIES.
Inventors
- 👤 Edward A Weaver
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |