US2899278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
lewis
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:49
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01G23/075; F; F28; F28G; F28G1/00; F28G1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR COOLING THE REACTION PRODUCT STREAM OF TITANIUM DIOXIDE AND ACCOMPANYING GASES WHICH RESULTS FROM THE VAPOR PHASE OXIDATION OF TICL4 TO TIO2, SAID PROCESS COMPRISING PASSING SAID STREAM THROUGH AN EXTERNALLY COOLED CONDUIT WHILE REMOVING TITANIUM DIOXIDE ADHERING TO THE WALLS OF THE CONDUIT BY ADDING TO SAID STREAM, IN AN AMOUNT OF ABOUT 1-10% OF THE WEIGHT OF TIO2 IN THE STREAM, TITANIUM DIOXIDE GRANULES OBTAINED BY WATER-WASHING, COLLECTING AND HEATING TO A TEMPERATURE WITHIN THE RANGE OF 500* C-900* C, TITANIUM DIOXIDE DUST FROM A FLUID ENERGY MILL USED FOR GRINDING TO PIGMENT PARTICLE SIZE THE TIO2 PRODUCT PRODUCED IN A VAPOR PHASE OXIDATION OF TICL4, SEPARATING THE TITANIUM DIOXIDE EXCITED FROM THE COOLING CONDUIT AND THE EXCITED GASEOUS PRODUCTS, AND RECOVERING COOLED TITANIUM DIOXIDE.
Claim 2
Dependent Claim
130 words
A PROCESS FOR COOLING THE REACTION PRODUCT STREAM OF TITANIUM DIOXIDE AND ACCOMPANYING GASES WHICH RESULTS FROM THE VAPOR PHASE OXIDATION OF TICL4 TO TIO2, SAID PROCESS COMPRISING PASSING SAID STREAM THROUGH AN EXTERNALLY COOLED CONDUIT WHILE REMOVING TITANIUM DIOXIDE ADHERING TO THE WALLS OF THE CONDUIT BY ADDING TO SAID STREAM, IN AN AMOUNT OF ABOUT 1-10% OF THE WEIGHT OF TIO2 IN THE STREAM, TITANIUM DIOXIDE GRANULES OBTAINED BY WATER-WASHING, COLLECTING AND HEATING TO A TEMPERATURE WITHIN THE RANGE OF 500* C-900* C, TITANIUM DIOXIDE DUST FROM A FLUID ENERGY MILL USED FOR GRINDING TO PIGMENT PARTICLE SIZE THE TIO2 PRODUCT PRODUCED IN A VAPOR PHASE OXIDATION OF TICL4, SEPARATING THE TITANIUM DIOXIDE EXCITED FROM THE COOLING CONDUIT AND THE EXCITED GASEOUS PRODUCTS, AND RECOVERING COOLED TITANIUM DIOXIDE.
References Cited (Backward Citations)
US2721626A
Cited
US2691571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |