US3068113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing metal oxides
Assignee: British Titan Products Co Ltd
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Filing: 1960-06-21
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Granted: 1962-12-11
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Expires: 1980-06-21
Abstract
No abstract record available.
Inventors
- 👤 Strain Franklin
- 👤 William L Wilson
- 👤 Jr Paul L Dietz
- 👤 Hughes William
- 👤 Arkless Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:43
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF PREPARING FINELY-DIVIDED, PIGMENTARY TITANIUM DIOXIDE WHICH COMPRISES REACTING AT AN ELEVATED TEMPERATURE A METAL HALIDE AND AN OXYGEN-CONTAINING GAS CAPABLE OF REACTING WITH SAID METAL HALIDE TO PRODUCE A FINELY-DIVIDED, WHITE, NON-DISCOLORING METAL OXIDE, SAID OXYGEN-CONTAINING GAS CONTAINING OXYGEN IN SUBSTANTIAL EXCESS OF STOICHIOMETRIC PROPORTIONS BASIC THE METAL HALIDE, MAINTAINING THE RESULTING MIXTURE ABOVE 500*C., IMMEDIATELY THEREAFTER CONTACTING THE RESULTING SUSPENSION OF METAL OXIDE SOLIDS IN OXYGEN-CONTAINING GAS WITH A SEPARATE STREAM OF TITANIUM TETRACHLORIDE AT A TEMPERATURE BETWEEN 700*C. AND 1500*C., AND RECOVERING PIGMENTARY TITANIUM DIOXIDE SUBSTANTIALLY AS FORMED.
Claim 2
Independent Claim
93 words
A METHOD OF PREPARING FINELY-DIVIDED, PIGMENTARY TITANIUM DIOXIDE WHICH COMPRISES REACTING AT AN ELEVATED TEMPERATURE A METAL HALIDE AND AN OXYGEN-CONTAINING GAS CAPABLE OF REACTING WITH SAID METAL HALIDE TO PRODUCE A FINELY-DIVIDED, WHITE, NON-DISCOLORING METAL OXIDE, SAID OXYGEN-CONTAINING GAS CONTAINING OXYGEN IN SUBSTANTIAL EXCESS OF STOICHIOMETRIC PROPORTIONS BASIC THE METAL HALIDE, MAINTAINING THE RESULTING MIXTURE ABOVE 500*C., IMMEDIATELY THEREAFTER CONTACTING THE RESULTING SUSPENSION OF METAL OXIDE SOLIDS IN OXYGEN-CONTAINING GAS WITH A SEPARATE STREAM OF TITANIUM TETRACHLORIDE AT A TEMPERATURE BETWEEN 700*C. AND 1500*C., AND RECOVERING PIGMENTARY TITANIUM DIOXIDE SUBSTANTIALLY AS FORMED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |