US3357792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kneading pretreatment for the production of aluminum hydroxide
Assignee: Individual
•
Filing: 1966-10-03
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Granted: 1967-12-12
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 Gebefugi Istvan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:03
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/06; C01F7/0613
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A PROCESS FOR PRETREATING A GROUND ALUMINA-BEARING RAW MATERIAL FOR PRODUCING ALUMINUM HYDROXIDE ACCORDING TO THE BAYER PROCESS, IN WHICH PROCESS SAID ALUMINA-BEARING RAW MATERIAL PASSES THROUGH A DIGESTING STEP, THE IMPROVEMENT COMPRISING, BEFORE SAID DIGESTION STEP, MIXING SAID ALUMINA-BEARING RAW MATERIAL WITH AT LEAST ONE ALKALINE ELECTROLTE AND WATER, THEREBY FORMING A MASS HAVING A HIGHLY PLASTIC CONSISTENCY AND THOROUGHLY KNEADING SAID MASS WITHN COMPRESSING AND SHEARING ACTION TO SWELL AND DISAGGREGATE AGGLOMERATED PARTICLES OF THE SAID ALUMINA-BERING RAW MATERIAL.
Claim 2
Dependent Claim
82 words
IN A PROCESS FOR PRETREATING A GROUND ALUMINA-BEARING RAW MATERIAL FOR PRODUCING ALUMINUM HYDROXIDE ACCORDING TO THE BAYER PROCESS, IN WHICH PROCESS SAID ALUMINA-BEARING RAW MATERIAL PASSES THROUGH A DIGESTING STEP, THE IMPROVEMENT COMPRISING, BEFORE SAID DIGESTION STEP, MIXING SAID ALUMINA-BEARING RAW MATERIAL WITH AT LEAST ONE ALKALINE ELECTROLTE AND WATER, THEREBY FORMING A MASS HAVING A HIGHLY PLASTIC CONSISTENCY AND THOROUGHLY KNEADING SAID MASS WITHN COMPRESSING AND SHEARING ACTION TO SWELL AND DISAGGREGATE AGGLOMERATED PARTICLES OF THE SAID ALUMINA-BERING RAW MATERIAL.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |