Production of very high purity metal oxide articles
Abstract
Abstract VERY HIGH PURITY METAL OXIDE ARTICLES ARE PRODUCED BY A PROCESS WHEREIN A FINELY DIVIDED ELEMENTAL METAL IS FLUIDIZED IN A CARRIER GAS AND IS INTIMATELY CONTACTED WITH A VAPOROUS COMBUSTIBLE STREAM TO FORM A REACTANT STREAM WHICH IN TURN IS IGNITED TO FORM A METAL OXIDE BY DIRECT OXIDATION OF THE FLUIDIZED METAL COMPOUND. VAPOROUS METAL HALIDE CAN BE ADMIXED WITH FLUIDIZED METAL TO SIMULTANEOUSLY HYDROLYZE THE HALIDE AND OXIDIZE THE METAL TO THE CORRESPONDING METAL OXIDES. THE IGNITED REACTANT STREAM IS IMPINGED ON A DEPOSITION SURFACE TO FORM THE METAL OXIDE ARTICLE OF VERY HIGH PURITY. IN A PREFERRED EMBODIMENT FLUIDIZED SILICON AND VAPOROUS SILICON TETRA CHLORIDE ARE CONTACTED WITH A STREAM OF ELEMENTAL HYDROGEN AND ELEMENTAL OXYGEN TO FORM A RESULTANT STREAM WHICH IS COMBUSTED TO FORM A HIGH PUITY SILICON DIOXIDE ARTICLE ON THE DEPOSITION SURFACE.
Inventors
- 👤 Herbert J Moltzan
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |