US3597481A
Expired / Lapsed
US
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Heterogeneous catalyst for the liquid phase hydrolysis of nitriles to amides
Assignee: Dow Chemical Co
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Filing: 1969-01-16
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Granted: 1971-08-03
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Expires: 1989-01-16
Abstract
Abstract COMBINATIONS CONSISTING ESSENTIALLY OF 10 TO 90% BY WEIGHT OF OXIDES OF COPPER, SILVER, ZINCE OR CADMIUM AND 10 TO 90% BY WEIGHT OF OXIDES OF CHROMIUM OR MOLYBDENUM ARE USED TO CATALYZE THE LIQUID PHASE CONVERSION OF NITRILES TO AMIDES.
Inventors
- 👤 Ben A Tefertiller
- 👤 Clarence E Habermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:17
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; B01J23/16; B01J23/24; B01J23/26; B01J23/72; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |