Patent US3073712A successfully refreshed from Google Patents.
US3073712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of titanium dioxide
Assignee: Laporte Titanium Ltd
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Filing: 1960-08-05
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Granted: 1963-01-15
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Expires: 1980-08-05
Abstract
No abstract record available.
Inventors
- 👤 Wigginton Raymond Jones
- 👤 Leighton James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:39
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PROCESS FOR THE SIMULTANEOUS MANUFACTURE OF TITANIUM DIOXIDE AND TITANIUM DIOXIDE ADMIXED WITH ALUMINUM OXIDE, WHICH COMPRISES, INTRODUCING A TITANIUM TETRAHALIDE VAPOUR SELECTED FROM THE GROUP CONSISTING OF THE VAPOURS OF TITANIUM TETRACHLORIDE, TITANIUM TETRABROMIDE AND TITANIUM TETRAIDIDE AND AN EXCESS OF A GAS TAKEN FROM THE GROUP CONSISTING OF OXYGEN AND GASES CONTAINING OXYGEN INTO A BED OF PARTICLES OF A REFRACTORY METALLIC MATERIAL SUBSTANTIALLY FREE FROM ALUMINUN OXIDE, WHICH BED IS MAINTAINED IN A FLUIDISES CONDITION AT A TEMPERTURE WITHIN THE RANGE OF FROM 750* C. TO 1,500* C., TO OXIDISE THE TITANIUM TETRAHALIDE TO TITANIUM DIOXIDE OF WHICH A PART IS RETAINED IN THE BED AND REMOVED THEREFROM TO FORM A PRODUCT WHICH IS SUITABLE FOR NON-PIGMENTARY USE, AND THE REMAINDER OF THE TITANIUM DIOXIDE IS ENTRAINED IN THE GAS STREAM LEAVING THE BED, AND INCORPORATING ALIMINUM OXIDE WITH THE ENTRAINED TITANIUM
Claim 2
Dependent Claim
146 words
A PROCESS FOR THE SIMULTANEOUS MANUFACTURE OF TITANIUM DIOXIDE AND TITANIUM DIOXIDE ADMIXED WITH ALUMINUM OXIDE, WHICH COMPRISES, INTRODUCING A TITANIUM TETRAHALIDE VAPOUR SELECTED FROM THE GROUP CONSISTING OF THE VAPOURS OF TITANIUM TETRACHLORIDE, TITANIUM TETRABROMIDE AND TITANIUM TETRAIDIDE AND AN EXCESS OF A GAS TAKEN FROM THE GROUP CONSISTING OF OXYGEN AND GASES CONTAINING OXYGEN INTO A BED OF PARTICLES OF A REFRACTORY METALLIC MATERIAL SUBSTANTIALLY FREE FROM ALUMINUN OXIDE, WHICH BED IS MAINTAINED IN A FLUIDISES CONDITION AT A TEMPERTURE WITHIN THE RANGE OF FROM 750* C. TO 1,500* C., TO OXIDISE THE TITANIUM TETRAHALIDE TO TITANIUM DIOXIDE OF WHICH A PART IS RETAINED IN THE BED AND REMOVED THEREFROM TO FORM A PRODUCT WHICH IS SUITABLE FOR NON-PIGMENTARY USE, AND THE REMAINDER OF THE TITANIUM DIOXIDE IS ENTRAINED IN THE GAS STREAM LEAVING THE BED, AND INCORPORATING ALIMINUM OXIDE WITH THE ENTRAINED TITANIUM
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |