US2604455A
Expired / Lapsed
US
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Preparation and reactivation of foraminate catalysts
Assignee: Imperial Chemical Industries Ltd
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Filing: 1949-07-26
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Granted: 1952-07-22
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Expires: 1969-07-26
Abstract
No abstract record available.
Inventors
- 👤 Reynolds Peter William
- 👤 Robinson Ralph Lozelu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:20
CPC Classifications
B; B01; B01J; B01J25/00; B01J25/04; B01J37/00; B01J37/06; Y; Y10; Y10S; Y10S502/00; Y10S502/514
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR THE PREPARATION OF FORAMINATE CATALYSTS WHICH COMPRISES TREATING AN ALLOY SELECTED FROM COPPER-ALUMINIUM ALLOYS CONTAINING 40 TO 80% BY WEIGHT OF COPPER, NICKEL-ALUMINIUM ALLOYS CONTAINING 30 TO 62% BY WEIGHT OF NICKEL, COBALT-ALUMINIUM ALLOYS CONTAINING 15 TO 55% BY WEIGHT OF COBALT, AND IRON-ALUMINIUM ALLOYS CONTAINING 30 TO 55% BY WEIGHT OF IRON, WITH A STREAM OF AN AQUEOUS SOLUTION OF ALKALI AT AN UNINTERRUPTED SPACE VELOCITY OF GREATER THAN 10 TO REMOVE AT LEAST A PORTION OF THE ALUMINIUM FROM THE SURFACE LAYERS OF THE ALLOY, AND SUBSEQUENTLY WITHOUT INTERRUPTION OF FLOW, REPLACING THE AQUEOUS ALKALI WITH A STREAM OF WASHING LIQUID COMPRISING WATER, THE VELOCITY OF SAID STREAM BEING SUCH AS TO PRECLUDE THE DEPOSITION OF ALUMINA ON THE ACTIVATED CATALYST.
Claim 2
Dependent Claim
126 words
A PROCESS FOR THE PREPARATION OF FORAMINATE CATALYSTS WHICH COMPRISES TREATING AN ALLOY SELECTED FROM COPPER-ALUMINIUM ALLOYS CONTAINING 40 TO 80% BY WEIGHT OF COPPER, NICKEL-ALUMINIUM ALLOYS CONTAINING 30 TO 62% BY WEIGHT OF NICKEL, COBALT-ALUMINIUM ALLOYS CONTAINING 15 TO 55% BY WEIGHT OF COBALT, AND IRON-ALUMINIUM ALLOYS CONTAINING 30 TO 55% BY WEIGHT OF IRON, WITH A STREAM OF AN AQUEOUS SOLUTION OF ALKALI AT AN UNINTERRUPTED SPACE VELOCITY OF GREATER THAN 10 TO REMOVE AT LEAST A PORTION OF THE ALUMINIUM FROM THE SURFACE LAYERS OF THE ALLOY, AND SUBSEQUENTLY WITHOUT INTERRUPTION OF FLOW, REPLACING THE AQUEOUS ALKALI WITH A STREAM OF WASHING LIQUID COMPRISING WATER, THE VELOCITY OF SAID STREAM BEING SUCH AS TO PRECLUDE THE DEPOSITION OF ALUMINA ON THE ACTIVATED CATALYST.
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) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |