US3756964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supported copper chromite catalyst
Assignee: —
•
Filing: 1972-04-26
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Granted: 1973-09-04
•
Expires: 1992-04-26
Abstract
Abstract A VERY EFFECTIVE SUPPORTED COPPER CHROMITE CATALYST CAN BE PRODUCED BY REACTIVELY FORMING BASIC AMMONIUM CUPRIC CHROMATE IN THE PORES OF THE SUPPORT, FOLLOWED BY CALCINATION TO YIELD A SUPPORTED CATALYST HAVING THE SUPPORT PORES LOADED WITH COPPER CHROMITE. THE SUPPORT WHICH IS USED MAY BE A SILICA, ALUMINA, SILICA-ALUMINA MIXTURE, OR AN ALUMINOSILICATE. THIS SUPPORTED COPPER CHROMITE CATALYST IS VERY USEFUL IN HYDROGENATION REACTIONS.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |