US2670377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of alkyl nitroaromatic compounds
Assignee: UNVIERSAL OIL PRODUCTS Co
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Filing: 1951-08-30
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Granted: 1954-02-23
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Expires: 1971-08-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:37
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A PROCESS FOR SELECTIVELY REDUCING THE NITRO GROUP OF AN ALKYL NITROAROMATIC COMPOUND TO THE CORRESPONDING AMINO-SUBSTITUTED ALKYLAROMATIC COMPOUND BY CONTACT OF THE FIRST-NAMED COMPOUND WITH A METALLIC HYDROGENATION CATALYST IN THE PRESENCE OF HYDROGEN AND AT HYDROGENATING CONDITIONS OF TEMPERATURE AND PRESSURE, THE IMPROVEMENT WHICH COMPRISES PASSING OVER THE CATALYST A SOLUTION OF SAID ALKYL NITROAROMATIC COMPOUND IN A MIXTURE OF A PARAFFINIC HYDROCARBON WHICH IS LIQUID AT SAID CONDITIONS AND AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL.
Claim 2
Dependent Claim
84 words
IN A PROCESS FOR SELECTIVELY REDUCING THE NITRO GROUP OF AN ALKYL NITROAROMATIC COMPOUND TO THE CORRESPONDING AMINO-SUBSTITUTED ALKYLAROMATIC COMPOUND BY CONTACT OF THE FIRST-NAMED COMPOUND WITH A METALLIC HYDROGENATION CATALYST IN THE PRESENCE OF HYDROGEN AND AT HYDROGENATING CONDITIONS OF TEMPERATURE AND PRESSURE, THE IMPROVEMENT WHICH COMPRISES PASSING OVER THE CATALYST A SOLUTION OF SAID ALKYL NITROAROMATIC COMPOUND IN A MIXTURE OF A PARAFFINIC HYDROCARBON WHICH IS LIQUID AT SAID CONDITIONS AND AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL.
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |