US2559638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of titanium dioxide
Assignee: EIDP Inc
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Filing: 1947-07-25
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Granted: 1951-07-10
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Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Krchma Ignace Joseph
- 👤 Schaumann Holger Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:23
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR OBTAINING PIGMENTARY TITANIUM DIOXIDE WHICH COMPRISES REACTING IN THE VAPOR PHASE, AND AT TEMPERATURES RANGING FROM 8001350* C., TITANIUM TETRACHLORIDE AND A SMALL AMOUNT OF ALUMINUM CHLORIDE WITH AN OXYGEN CONTAINING GAS, EFFECTING SAID REACTION OVER A TIME PERIOD RANGING FROM .01 TO 5 SECONDS AND IN THE PRESENCE OF FROM .05 TO 10% BY VOLUME, BASED ON THE TOTAL VOLUME OF GASES BEING REACTED, OF WATER VAPOR, AND THEREAFTER RECOVERING THE TIO2 PRODUCT FROM THE RESULTING REACTION PRODUCTS.
Claim 2
Dependent Claim
82 words
A PROCESS FOR OBTAINING PIGMENTARY TITANIUM DIOXIDE WHICH COMPRISES REACTING IN THE VAPOR PHASE, AND AT TEMPERATURES RANGING FROM 8001350* C., TITANIUM TETRACHLORIDE AND A SMALL AMOUNT OF ALUMINUM CHLORIDE WITH AN OXYGEN CONTAINING GAS, EFFECTING SAID REACTION OVER A TIME PERIOD RANGING FROM .01 TO 5 SECONDS AND IN THE PRESENCE OF FROM .05 TO 10% BY VOLUME, BASED ON THE TOTAL VOLUME OF GASES BEING REACTED, OF WATER VAPOR, AND THEREAFTER RECOVERING THE TIO2 PRODUCT FROM THE RESULTING REACTION PRODUCTS.
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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |