US2603609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binding bauxite fines into granules with colloidal silica
Assignee: Porocel Industries LLC
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Filing: 1949-04-26
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Granted: 1952-07-15
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Expires: 1969-04-26
Abstract
No abstract record available.
Inventors
- 👤 Heinemann Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:30
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/28; B01J20/00; B01J20/02; B01J20/10; B01J20/12; B01J21/00; B01J21/12; C; C01; C01F; C01F7/00; C01F7/02; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR PRODUCING BAUXITE GRANULES FROM BAUXITE FINES, WHICH COMPRISES MIXING WITH BAUXITE FINES A COLLOIDAL SOLUTION OF SILICA HAVING AN AVERAGE PARTICLE BETWEEN 100 AND 600 A. AND A PH BETWEEN 9.5 AND 10.5 IN AN AMOUNT SUFFICIENT TO GIVE BETWEEN 2% AND 20% OF SILICA IN THE BAUXITE FINES, FORMING THE SILICA-IMPREGNATED FINES INTO MASSES UNDER A PRESSURE BETWEEN 100 AND 3000 LBS/SQ., IN., DRYING THE MASSES, AND CALCINING THE DRIED MASSES AT 600* F. TO 1200* F.
Claim 2
Independent Claim
81 words
A METHOD FOR PRODUCING BAUXITE GRANULES FROM BAUXITE FINES, WHICH COMPRISES MIXING WITH BAUXITE FINES A COLLOIDAL SOLUTION OF SILICA HAVING AN AVERAGE PARTICLE BETWEEN 100 AND 600 A. AND A PH BETWEEN 9.5 AND 10.5 IN AN AMOUNT SUFFICIENT TO GIVE BETWEEN 2% AND 20% OF SILICA IN THE BAUXITE FINES, FORMING THE SILICA-IMPREGNATED FINES INTO MASSES UNDER A PRESSURE BETWEEN 100 AND 3000 LBS/SQ., IN., DRYING THE MASSES, AND CALCINING THE DRIED MASSES AT 600* F. TO 1200* F.
References Cited (Backward Citations)
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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) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |