Patent US3697449A successfully refreshed from Google Patents.
US3697449A
Expired / Lapsed
US
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Alkali moderation of supported ruthenium catalysts
Assignee: EIDP Inc
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Filing: 1970-12-14
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Granted: 1972-10-10
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Expires: 1990-12-14
Abstract
Abstract SUPPORTED RUTHENIUM CATALYSTS ARE MODERATED WITH AN ALKALI METAL HYDROXIDE OR ALKOXIDE BY MIXING THE SUPPORTED CATALYST AND THE ALKALI METAL COMPOUND IN THE REACTION MEDIUM OF A HYDROGENATION PROCESS WHICH MAY CONTAIN UP TO 5% OF WATER, AT A TEMPERATURE RANGING FROM ABOUT 30*C TO ABOUT 300*C. THE MODERATED CATALYST IS AN EFFECTIVE HYDROGENATION CATALYST FOR THE HYDROGENATION OF AROMATC AMINES TO THE CORRESPONDING SATURATED CYCLIC AMINES.
Inventors
- 👤 Loren D Brake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |