US2909409A
Expired / Lapsed
US
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Process for cooling hot gases containing suspended titanium dioxide particles
Assignee: Fabriques de Produits Chimiques de Thann et de Mulhouse
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Filing: 1956-12-04
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Granted: 1959-10-20
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Expires: 1976-12-04
Abstract
No abstract record available.
Inventors
- 👤 Gregory Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:17
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01G23/075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR DIRECTLY COOLING A HOT GASEOUS SUSPENSION OF PIGMENTARY TITANIUM DIOXIDE PRODUCED BY THE DECOMPOSITION OF A TITANIUM HALIDE AT ELEVATED TEMPERATURES, WHICH COMPRISES RAPIDLY COOLING SAID SUSPENSION BY CONTINUOUSLY INTRODUCING INTO A STREAM OF SAID SUSPENSION, RELATIVELY COOL, FINELY DIVIDED PIGMENTARY TITANIUM DIOXIDE HAVING PARTICLE SIZES SUBSTANTIALLY THE SAME AS THOSE OF THE TITANIUM DIOXIDE PARTICLES CONTAINED IN SAID GASEOUS SUSPENSION AND IN AN AMOUNT AT LEAST EQUAL TO THAT CONTAINED IN SAID HOT GASEOUS SUSPENSION SUFFICIENT TO FORM A MIXTURE HAVING A DESIRED SUBSTANTIALLY REDUCED TEMPERATURE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR DIRECTLY COOLING A HOT GASEOUS SUSPENSION OF PIGMENTARY TITANIUM DIOXIDE PRODUCED BY THE DECOMPOSITION OF A TITANIUM HALIDE AT ELEVATED TEMPERATURES, WHICH COMPRISES RAPIDLY COOLING SAID SUSPENSION BY CONTINUOUSLY INTRODUCING INTO A STREAM OF SAID SUSPENSION, RELATIVELY COOL, FINELY DIVIDED PIGMENTARY TITANIUM DIOXIDE HAVING PARTICLE SIZES SUBSTANTIALLY THE SAME AS THOSE OF THE TITANIUM DIOXIDE PARTICLES CONTAINED IN SAID GASEOUS SUSPENSION AND IN AN AMOUNT AT LEAST EQUAL TO THAT CONTAINED IN SAID HOT GASEOUS SUSPENSION SUFFICIENT TO FORM A MIXTURE HAVING A DESIRED SUBSTANTIALLY REDUCED TEMPERATURE.
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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |