US2957753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium dioxide from titanium tetrachloride
Assignee: Wyeth Holdings LLC
•
Filing: 1958-11-05
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Granted: 1960-10-25
•
Expires: 1978-11-05
Abstract
No abstract record available.
Inventors
- 👤 Earl W Nelson
- 👤 James E Bondurant
- 👤 Guy C Marcot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:37
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A MET''OD OF MANUFACTURING TITANIUM DIOXIDE PIGMENT WHICH COMPRISES PASSING A FULL DISPLACEMENT FLOW A SINGLE PREFORMED HOMOGENEOUS GASEOUS COMBINATION MIXTURE CONTAINING TITANIUM TETRACHLORIDE AND OXYGEN AS PRINCIPAL PIGMENT-PRODUCING COMPONENTS INTO A SUBSTANTIALLY SELF-SUSTAINING FLAME SUBSTANTIALLY FORMED BY COMBUSTION OF SAID COMBUSTION MIXTURE ITSFLE, AND BURNING SAID MIXTURE IN FULL DISPLACEMENT FLOW IN SAID FLAME THEREBY UNIFORMLY OXIDIZING AT LEAST A SUBSTANTIAL PART OF SAID TITANIUM TETRACHLORIDE TO TITANIUM DIOXIDE IN SAID FLAME, SAID COMBUSTION MIXTURE HAVING AN AVERAGE SPEED BETWEEN ABOUT 2/3 AND 4/3 OF ITS AXIAL SPEED.
Claim 2
Dependent Claim
89 words
A MET''OD OF MANUFACTURING TITANIUM DIOXIDE PIGMENT WHICH COMPRISES PASSING A FULL DISPLACEMENT FLOW A SINGLE PREFORMED HOMOGENEOUS GASEOUS COMBINATION MIXTURE CONTAINING TITANIUM TETRACHLORIDE AND OXYGEN AS PRINCIPAL PIGMENT-PRODUCING COMPONENTS INTO A SUBSTANTIALLY SELF-SUSTAINING FLAME SUBSTANTIALLY FORMED BY COMBUSTION OF SAID COMBUSTION MIXTURE ITSFLE, AND BURNING SAID MIXTURE IN FULL DISPLACEMENT FLOW IN SAID FLAME THEREBY UNIFORMLY OXIDIZING AT LEAST A SUBSTANTIAL PART OF SAID TITANIUM TETRACHLORIDE TO TITANIUM DIOXIDE IN SAID FLAME, SAID COMBUSTION MIXTURE HAVING AN AVERAGE SPEED BETWEEN ABOUT 2/3 AND 4/3 OF ITS AXIAL SPEED.
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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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |