US3142637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flocculating agent and process for digested bauxite slurries
Assignee: Reynolds Metals Co
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Filing: 1961-01-31
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Granted: 1964-07-28
•
Expires: 1981-01-31
Abstract
No abstract record available.
Inventors
- 👤 George W Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:22
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/06; C01F7/0646; C01F7/0653
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
PROCESS FOR THE FLOCCULATION OF INSOLUBLE PORTIONS OF ALUMINUFEROUS ORES FROM ALKALI METAL ALUMINATE LIQUORS OBTAINED BY THE DIGESTION OF SAID ORES WITH CAUSTIC ALKAII SOLUTIONS, WHICH COMPRISES ADDING TO A SLURRY OF SAID INSOLUBLE ORE PORTIONS IN SAID ALUMINATE LIQUORS A FLOCCULATING AND SETTLING AGENT COMPRISING STARCH IN AN AMOUNT FROM ABOUT 0.25% TO ABOUT 1.5% BY WEIGHT OF SAID INSOLUBLE ORE PORTIONS AND FROM ABOUT 40% TO ABOUT 80% BY WEIGHT OF THE STARCH, OF A COMPOUND OF BIVALENT LEAD.
Claim 2
Dependent Claim
82 words
PROCESS FOR THE FLOCCULATION OF INSOLUBLE PORTIONS OF ALUMINUFEROUS ORES FROM ALKALI METAL ALUMINATE LIQUORS OBTAINED BY THE DIGESTION OF SAID ORES WITH CAUSTIC ALKAII SOLUTIONS, WHICH COMPRISES ADDING TO A SLURRY OF SAID INSOLUBLE ORE PORTIONS IN SAID ALUMINATE LIQUORS A FLOCCULATING AND SETTLING AGENT COMPRISING STARCH IN AN AMOUNT FROM ABOUT 0.25% TO ABOUT 1.5% BY WEIGHT OF SAID INSOLUBLE ORE PORTIONS AND FROM ABOUT 40% TO ABOUT 80% BY WEIGHT OF THE STARCH, OF A COMPOUND OF BIVALENT LEAD.
References Cited (Backward Citations)
CA487987A
Cited
US1198100A
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US1973999A
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US2216844A
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US2188933A
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FR861741A
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US2280998A
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US2468207A
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US2685369A
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US2937143A
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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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |