Patent US2937928A successfully refreshed from Google Patents.
US2937928A
Expired / Lapsed
US
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Preparation of titanium dioxide
Assignee: British Titan Products Co Ltd
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Filing: 1956-04-20
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Granted: 1960-05-24
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Expires: 1976-04-20
Abstract
No abstract record available.
Inventors
- 👤 Hughes William
- 👤 Harris Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:03
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
IN THE METHOD OF PREPARING TITANIUM DIOXIDE BY THE REACTION OF TITANIUM TETRACHLORIDE WITH OXYGEN IN A REACTION ZONE, THE IMPROVEMENT WHICH COMPRISES ESTABLISHING SEPARATE HEATED STREAMS OF OXYGEN AND TITANIUM TETRACHLORIDE FLOWING IN THE SAME DIRECTION AND CONCURRENTLY TO EACH OTHER, CONTACTING THE RESULTING FLOWING STREAMS IN THE REACTION ZONE WHILE MAINTAINING THE REYNOLD''S FLOW NUMBERS OF THE OXYGEN AND TITANIUM TETRACHLORIDE STREAMS AT THE POINT OF CONTACT THEREOF IN THE LAMINAR FLOW AREA AND NOT IN EXCESS OF 500 AND 1800 RESPECTIVELY, THE TEMPERATURE AT THE POINT OF CONTACT BEING SUFFICIENTLY HIGH TO CAUSE REACTION BETWEEN THE STREAMS TO THEREBY PRODUCE TITANIUM DIOXIDE AND CHLORINE.
References Cited (Backward Citations)
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US2445691A
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US2779662A
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GB726250A
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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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |