US3767706A
Expired / Lapsed
US
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Hydration of aliphatic nitriles to amides using copper metal catalysts
Assignee: Dow Chemical Co
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Filing: 1971-09-02
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Granted: 1973-10-23
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Expires: 1991-09-02
Abstract
Abstract ALIPHATIC NITRILES ARE CONVERTED TO THE CORRESPONDING AMIDES BY CONTACTING THE NITRILE IN THE PRESENCE OF WATER WITH A CUPREOUS CATALYST CONTAINING COPPER METAL.
Inventors
- 👤 C Habermann
- 👤 B Tefertiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
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; B01J37/00; B01J37/16; B01J25/00
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |