US2859183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing alumina sols from aluminum pellets
Assignee: Wyeth Holdings LLC
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Filing: 1955-06-03
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Granted: 1958-11-04
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Expires: 1975-06-03
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Ashley
- 👤 Gorgo J Bruni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:34
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428; B; B01; B01J; B01J13/00; B01J13/0004; C01P; C01P2006/00; C01P2006/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS OF PREPARING AN ALUMINA SOL OF HIGH AL2O3 SOLIDS CONTENT AND LOW VISCOSITY WHICH COMPRISES POURING MOLTEN ALUMINUM HAVING A TEMPERATURE OF FROM ABOUT 1228 TO ABOUT 1500*F. THROUGH AN OPENING HAVING A DIAMETER OF FROM ABOUT 3/64 TO ABOUT 17/64 OF AN INCH UNDER A HYDROSTATIC HEAD OF FROM ABOUT 2 TO ABOUT 10 INCHES, IMPINGING THE DOWNWARDLY FALLING ALUMINUM AGAINST A RAPIDLY FLOWING FLUID STREAM TO BREAK UP THE SAME AND CARRY IT AWAY FROM THE LINE OF DOWNWARD FLIGHT IN THE FORM OF INDIVIDUAL FLATTENED ALUMINUM PELLETS, AND SUBJEACTING THE ALUMINUM PELLETS TO THE ACTION OF A WEEK AQUEOUS LOWER ALIPHATIC ACID IN CONTACT WITH AN AMALGEMATING AGENT COMPRISING MERCURY WHEREBY THE SOL IS FORMED.
Claim 2
Dependent Claim
120 words
A PROCESS OF PREPARING AN ALUMINA SOL OF HIGH AL2O3 SOLIDS CONTENT AND LOW VISCOSITY WHICH COMPRISES POURING MOLTEN ALUMINUM HAVING A TEMPERATURE OF FROM ABOUT 1228 TO ABOUT 1500*F. THROUGH AN OPENING HAVING A DIAMETER OF FROM ABOUT 3/64 TO ABOUT 17/64 OF AN INCH UNDER A HYDROSTATIC HEAD OF FROM ABOUT 2 TO ABOUT 10 INCHES, IMPINGING THE DOWNWARDLY FALLING ALUMINUM AGAINST A RAPIDLY FLOWING FLUID STREAM TO BREAK UP THE SAME AND CARRY IT AWAY FROM THE LINE OF DOWNWARD FLIGHT IN THE FORM OF INDIVIDUAL FLATTENED ALUMINUM PELLETS, AND SUBJEACTING THE ALUMINUM PELLETS TO THE ACTION OF A WEEK AQUEOUS LOWER ALIPHATIC ACID IN CONTACT WITH AN AMALGEMATING AGENT COMPRISING MERCURY WHEREBY THE SOL IS FORMED.
References Cited (Backward Citations)
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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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |