Low-gassing battery separator and method of production
Abstract
Abstract C. IN A CARBON MONOXIDE-CARBON DIOXIDE ATMOSPHERE, TO PRODUCE A POROUS SINTERED MEMBRANE CONSISTING ESSENTIALLY OF MAGNESIUM SILICATE AND IRON SILICATE, E.G., A SINTERED POROUS OLIVINE SEPARATOR, THE IRON CONTENT THEREOF BEING SUBSTANTIALLY ENTIRELY IN FERROUS FORM. PRODUCTION OF INORGANIC POROUS SINTERED BATTERY SEPARATOR SUBSTANTIALLY REDUCING FORMATION OF GAS WHEN IN CONTACT WITH A ZINC ELECTRODE, AND PERMITTING LONG CYCLE LIFE OF A HIGH ENERGY DENSITY BATTERY SUCH AS A SILVER-ZINC BATTERY, PRODUCED ACCORDING TO A PREFERRED EMBODIMENT BY FIRING OR SINTERING A COMPACTED MAGNESIUM SILICATE-IRON SILICATE COMPOSITION, PARTICULARLY THE MINERAL OLIVEINE, AT TEMPERATURE RANGING FROM ABOUT 1,000*C. TO ABOUT 1,400*
Inventors
- 👤 Joseph S Smatko
Bibliographic Details
Claims Analysis
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |