US2797244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the hydrogenation of meta-nitroacetophenone
Assignee: Union Carbide Corp
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Filing: 1953-10-16
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Granted: 1957-06-25
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Expires: 1973-10-16
Abstract
No abstract record available.
Inventors
- 👤 Samuel W Tinsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:09
CPC Classifications
C; C07; C07C; C07C221/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A PROCESS FOR THE HYDROGENATION OF CRUDE METANITROACETOPHENONE, OBTAINED BY THE NITRATION OF ACETOPHENONE AND CONTAINING A WATER-INSOLUBLE ACID, IN A HYDROGENATION ZONE TO PRODUCE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF META-AMINOACETOPHENONE AND META-AMINOPHENYLMETHYLCARBINOL UNDER HYDROGENATING CONDITIONS IN THE PRESENCE OF A HYDROGENATION CATALYST, THE IMPROVEMENT WHICH COMPRISES WASHING THE CURDE META-NITROACETOPHENONE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN AQUEOUS ALKALI METAL CARBONATE SOLUTION AND AN AQUEOUS ALKALI METAL CARBONSOLUTION AND THEREAFTER INTRODUCING THE MATA-NITROACETOPHENONE,THUS WASHED, INTO THE HYDROGENATION ZONE FOR HYDROGENATION.
Claim 2
Dependent Claim
88 words
IN A PROCESS FOR THE HYDROGENATION OF CRUDE METANITROACETOPHENONE, OBTAINED BY THE NITRATION OF ACETOPHENONE AND CONTAINING A WATER-INSOLUBLE ACID, IN A HYDROGENATION ZONE TO PRODUCE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF META-AMINOACETOPHENONE AND META-AMINOPHENYLMETHYLCARBINOL UNDER HYDROGENATING CONDITIONS IN THE PRESENCE OF A HYDROGENATION CATALYST, THE IMPROVEMENT WHICH COMPRISES WASHING THE CURDE META-NITROACETOPHENONE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN AQUEOUS ALKALI METAL CARBONATE SOLUTION AND AN AQUEOUS ALKALI METAL CARBONSOLUTION AND THEREAFTER INTRODUCING THE MATA-NITROACETOPHENONE,THUS WASHED, INTO THE HYDROGENATION ZONE FOR HYDROGENATION.
References Cited (Backward Citations)
US2680136A
Cited
US2683745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |