Patent US2659762A successfully refreshed from Google Patents.
Patent US3784670A successfully refreshed from Google Patents.
US3784670A
Expired / Lapsed
US
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Titanium dixide concentrate and its manufacturing process
Assignee: Ishihara Sangyo Kaisha Ltd
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Filing: 1972-04-10
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Granted: 1974-01-08
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Expires: 1992-04-10
Abstract
Abstract AN IMPROVED PROCESS FOR LEACHING A TITANIFEROUS IRON ORE WITH AN ACID TO REMOVE IRON AND CONCENTRATE THE TITANIUM VALVE. THE ORE IS LEACHED WITH A MINERAL ACID AND THE INTERMEDIATE CONCENTRATE DURING THE PROCESS OF ACID-LEACHING IS MAGNETICALLY SEPERATED INTO A FRACTION WHICH IS SUFFICIENTLY CONCENTRATED AND A FRACTION WHICH IS NOT SUFFICIENTLY CONCENTRATED AND ONLY THE LATTER IS CONTINUOUSLY LEACHED. THE CONCENTRATION IS EFFECTIVELY AND ECONOMICALLY CARRIED OUT TO GIVE A HIGH GRADE CONCENTRATE WHICH HAS A COARSE GRAIN AND A GOOD FLUIDITY.
Inventors
- 👤 S Yamada
- 👤 K Miyazawa
- 👤 H Naka
- 👤 Y Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:52
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1213; C01; C01G; C01G43/00; C01G43/04; C01G43/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |