US3245818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase oxidation
Assignee: British Titan Products Co Ltd
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Filing: 1962-09-13
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Granted: 1966-04-12
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Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Evans Arthur Wallace
- 👤 Arkless Kenneth
- 👤 Peacock John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:11
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN THE VAPOR PHASE OXIDATION OF A TITANIUM TETRAHALIDE TO FORM TITANIUM DIOXIDE WITHIN A FLUIDIZED BED, THE IMPROVEMENT WHICH COMPRISES REDUCING ADHERENCE OF THE TITANIUM DIOXIDE TO THE BED PARTICLES BY SEPARATELY INTRODUCING RISING GASEOUS STREAMS OF ALUMINUM HALIDE AND TITANIUM TETRAHALIDE INTO THE BED, THE ALUMINUM HALIDE BEING INTRODUCED IN AN AMOUNT SUFFICIENT TO PRODUCE AT LEAST 0.1 PERCENT ALUMINA BY WEIGHT OF THE TITANIUM DIOXIDE PRODUCED, WHILE PROVIDING IN THE BED PARTICLES SELECTED FROM THE GROUP CONSISTING OF SILICA, ZIRCONIA, ALUMINA, AND TITANIUM DIOXIDE, AT LEAST 25 PERCENT BY WEIGHT OF THE BED PARTICLES CONTAINING SILICON CHEMICALLY ASSOCIATED WITH OXYGEN.
Claim 2
Dependent Claim
103 words
IN THE VAPOR PHASE OXIDATION OF A TITANIUM TETRAHALIDE TO FORM TITANIUM DIOXIDE WITHIN A FLUIDIZED BED, THE IMPROVEMENT WHICH COMPRISES REDUCING ADHERENCE OF THE TITANIUM DIOXIDE TO THE BED PARTICLES BY SEPARATELY INTRODUCING RISING GASEOUS STREAMS OF ALUMINUM HALIDE AND TITANIUM TETRAHALIDE INTO THE BED, THE ALUMINUM HALIDE BEING INTRODUCED IN AN AMOUNT SUFFICIENT TO PRODUCE AT LEAST 0.1 PERCENT ALUMINA BY WEIGHT OF THE TITANIUM DIOXIDE PRODUCED, WHILE PROVIDING IN THE BED PARTICLES SELECTED FROM THE GROUP CONSISTING OF SILICA, ZIRCONIA, ALUMINA, AND TITANIUM DIOXIDE, AT LEAST 25 PERCENT BY WEIGHT OF THE BED PARTICLES CONTAINING SILICON CHEMICALLY ASSOCIATED WITH OXYGEN.
References Cited (Backward Citations)
US2760846A
Cited
US3073712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |