US3730748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mixed oxides containing aluminum oxide
Assignee: Bayer AG
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Filing: 1971-02-17
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Granted: 1973-05-01
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Expires: 1991-02-17
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR THE PRODUCTION OF MIXED OXIDES BY REACTING THE TETRACHLORIDES OF SILICON, TITANIUM, TIN OR ZIRCONIUM, OR MIXTURES THEREOF, AND ALUMINUM TRICHLORIDE IN THE GAS PHASE WITH AN OXYGEN CONTAINING-GAS AT TEMPERATURES ABOVE 900*C., THE METAL TETRACHLORIDE/ALUMINUM TRICHLORIDE MIXTURE REQUIRED FOR THE REACTION BEING PREPARED IN SUCH A WAY THAT ALL THE HEAT OF REACTION LIBERATED DURING CHLORINATION OF THE ALUMINUM IS UTILIZED, AND THAT, FURTHERMORE, ANY SOLID SECONDARY PRODUCTS RESULTING FROM THE CHLORINATION OF THE ALUMINUM DO NOT NEED TO BE REMOVED.
Inventors
- 👤 G Lailach
- 👤 G Gerlach
- 👤 G Trenczek
- 👤 K Brandle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:09
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01B; C01B13/00; C01B13/14; C01B13/20; C01B13/22; C01P; C01P2004/00; C01P2004/60; C01P2004/62
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |