US3338677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brookite fibers and their preparation
Assignee: —
•
Filing: —
•
Granted: 1967-08-29
•
Expires: 1984-08-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:57
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; B; B01; B01J; B01J21/00; B01J21/06; B01J21/063; C01P; C01P2006/00; C01P2006/12; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR PREPARING FIBROUS TITANIUM DIOXIDE OF THE BROOKITE CRYSTALLINE STRUCTURE WHICH COMPRISES HYDROLYZING A MOLTEN MIXTURE COMPRISING ALKALI METAL HEXAFLUOROTITANATE AND ALKALI METAL HALIDE AT A TEMPERATURE OF ABOUT 665 TO 800*C. WITH A COVERING ATMOSPHERE OF WATER VAPOR AND FROM 0 TO 90 PERCENT INERT GAS IN A UNIFORMLY HEATED REACTION ZONE, AND RECOVERING SAID FIBROUS TITANIUM DIOXIDE.
Claim 2
Dependent Claim
61 words
A PROCESS FOR PREPARING FIBROUS TITANIUM DIOXIDE OF THE BROOKITE CRYSTALLINE STRUCTURE WHICH COMPRISES HYDROLYZING A MOLTEN MIXTURE COMPRISING ALKALI METAL HEXAFLUOROTITANATE AND ALKALI METAL HALIDE AT A TEMPERATURE OF ABOUT 665 TO 800*C. WITH A COVERING ATMOSPHERE OF WATER VAPOR AND FROM 0 TO 90 PERCENT INERT GAS IN A UNIFORMLY HEATED REACTION ZONE, AND RECOVERING SAID FIBROUS TITANIUM DIOXIDE.
References Cited (Backward Citations)
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Cited
US3030183A
Cited
US3012857A
Cited
US3065091A
Cited
US3252814A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |