US2650204A
Expired / Lapsed
US
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Preparation of catalysts
Assignee: Imperial Chemical Industries Ltd
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Filing: 1950-04-28
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Granted: 1953-08-25
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Expires: 1970-04-28
Abstract
No abstract record available.
Inventors
- 👤 Reynolds Peter William
- 👤 Challis Anthony Arthur Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:26
CPC Classifications
B; B01; B01J; B01J25/00; B01J23/00; B01J23/70; B01J23/72
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
152 words
A PROCESS FOR THE PREPARATION OF A FORAMINATE CATALYST COMPRISING AT LEAST ONE CATALYTIC METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, COBALT, NICKEL AND IRON WHICH COMPRISES TREATING AN ALLOY SELECTED FROM THE GROUP CONSISTING OF COPPER-ALUMINUM CONTAINING FROM 40 TO 80% BY WEIGHT OF COPPER, COPPER-SILICON CONTAINING FROM 50 TO 92% BY WEIGHT OF COPPER, COBALTALUMINUM CONTAINING FROM 15 TO 55% BY WEIGHT OF COBALT, COBALT-SILICON CONTAINING FROM 30 TO 75% BY WEIGHT OF COBALT, NICKEL-ALUMINUM CONTAINING FROM 30 TO 65% BY WEIGHT OF NICKEL, NICKEL-SILICON CONTAINING FROM 30 TO 85% BY WEIGHT OF NICKEL AND IRON-ALUMINUM CONTAINING FROM 30 TO 60% BY WEIGHT OF IRON IN THE LIQUID PHASE AT A TEMPERATURE OF FROM AT LEAST 100* TO 300* C. WITH A MONOHYDRIC PHENOL CONTAINING AT MOST EIGHT CARBON ATOMS FOR A TIME SUFFICIENT TO EXTRACT A SUBSTANTIAL PORTION OF AND NOT MORE THAN 70% OF THE EXTRACTIBLE ELEMENT.
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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |