US3219468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of soft beds in vapour phase oxidation of titanium tetrahalides
Assignee: British Titan Products Co Ltd
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Filing: 1961-07-24
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Granted: 1965-11-23
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 Evans Arthur Wallace
- 👤 Arkless Kenneth
- 👤 Callow Alan Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:02
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A METHOD FOR THE MANUFACTURE OF TITANIUM DIOXIDE PIGMENT WHICH COMPRISES THE STEPS OF ESTABLISHING A DYNAMIC BED OF INERT PARTICLES IN A CHAMBER WHEREIN SAID BED IS HEATED TO A TEMPERATURE OF ABOUT 800* TO ABOUT 1200*C., INTRODUCING SEPARATELY RISING STREAMS OF FREE OXYGEN CONTAINING GASEOUS MATERIALS AND TITANUM TETRACHLORIDE VAPOUR AT THE BOTTOM OF SAID CHAMBER TO MAINTAIN SAID BED IN DYNAMIC CONDITION, SAID SEPARATE STREAM OF FREE OXYGEN CONTAINING GASEOUS MATERIAL CONTAINING THEREIN VAPOROUS ALUMINIUM CHLORIDE AND SAID STREAM OF TICL4 VAPOUR CONTAINING THEREIN SILICON TETRACHLORIDE, THE AMOUNT OF ALCL3 AND SICL4 SEPARATELY INTRODUCED ITS FROM 0.1 TO 7 PERCENT, DETERMINED AS ALUMINA AND SILICA IN THE PIGMENT PRODUCED OF THE WEIGHT OF THE TITANIUM DIOXIDE PIGMENT PRODUCED, THE COMBINED WEIGHT OF ALUMINA AND SILICA, ON THE AVERAGE, NOT EXCEEDING 10 PERCENT OF THE WEIGHT OF SADI PIGMENT, SAID WEIGHT RATIO OF ALUMINA TO SILICA TO SAID PIGMENT IS BETWEEN 20:1 AND 1:5; WITHDRAWING FROM THECHAMBER PIGMENTARY TITANIUM DIOXIDE IN A GASEOUS STREAM; INTERMITTENTLY WITHDRAWING A PART OF SAID BED FROMTHE BED AND MILLING SAID PART TO REMOVE ADHERING PIGMENTARY TITANIUM DIOXIDE.
Claim 2
Independent Claim
185 words
A METHOD FOR THE MANUFACTURE OF TITANIUM DIOXIDE PIGMENT WHICH COMPRISES THE STEPS OF ESTABLISHING A DYNAMIC BED OF INERT PARTICLES IN A CHAMBER WHEREIN SAID BED IS HEATED TO A TEMPERATURE OF ABOUT 800* TO ABOUT 1200*C., INTRODUCING SEPARATELY RISING STREAMS OF FREE OXYGEN CONTAINING GASEOUS MATERIALS AND TITANUM TETRACHLORIDE VAPOUR AT THE BOTTOM OF SAID CHAMBER TO MAINTAIN SAID BED IN DYNAMIC CONDITION, SAID SEPARATE STREAM OF FREE OXYGEN CONTAINING GASEOUS MATERIAL CONTAINING THEREIN VAPOROUS ALUMINIUM CHLORIDE AND SAID STREAM OF TICL4 VAPOUR CONTAINING THEREIN SILICON TETRACHLORIDE, THE AMOUNT OF ALCL3 AND SICL4 SEPARATELY INTRODUCED ITS FROM 0.1 TO 7 PERCENT, DETERMINED AS ALUMINA AND SILICA IN THE PIGMENT PRODUCED OF THE WEIGHT OF THE TITANIUM DIOXIDE PIGMENT PRODUCED, THE COMBINED WEIGHT OF ALUMINA AND SILICA, ON THE AVERAGE, NOT EXCEEDING 10 PERCENT OF THE WEIGHT OF SADI PIGMENT, SAID WEIGHT RATIO OF ALUMINA TO SILICA TO SAID PIGMENT IS BETWEEN 20:1 AND 1:5; WITHDRAWING FROM THECHAMBER PIGMENTARY TITANIUM DIOXIDE IN A GASEOUS STREAM; INTERMITTENTLY WITHDRAWING A PART OF SAID BED FROMTHE BED AND MILLING SAID PART TO REMOVE ADHERING PIGMENTARY TITANIUM DIOXIDE.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |