US2671807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of n-alkyl aromatic amines
Assignee: EIDP Inc
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Filing: 1950-06-14
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Granted: 1954-03-09
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Expires: 1970-06-14
Abstract
No abstract record available.
Inventors
- 👤 William W Prichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/24; C07C209/26; C07C209/30; C07C209/32; C07C209/36; C07C211/00; C07C211/43; C07C211/44; C07C211/45; C07C211/46; C07C211/49; C07C211/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR THE PREPARATION OF N-ALKYLATED AROMATIC AMINO COMPOUNDS HAVING N-ALKYL GROUPS OF 5 TO 15 CARBONS WHEREIN AN AROMATIC NITROHYDROCARBON HAVING NOT MORE THAN TWO AROMATIC RINGS AND HAVING THE NITRO GROUP ON NUCLEAR CARBON IS REACTED, AT A TEMPERATURE OF 175-300* C. AND A PRESSURE OF 250-1500 ATMOSPHERES, WITH A MIXTURE OF HYDROGEN AND CARBON MONOXIDE IN MOLE RATIO VARYING FROM 5:1 TO 1:2, IN THE PRESENCE OF 5 TO 15%, BY WEIGHT OF THE AROMATIC NITROHYDROCARBON, OF A CATALYST CONSISTING ESSENTIALLY OF A CARBONYL OF AN EIGHT GROUP ELEMENT OF ATOMIC NUMBER BETWEEN 27 AND 44 AND INSOLATING SUCH N-ALKYLATED AROMATIC AMINO COMPOUND.
Claim 2
Dependent Claim
107 words
A PROCESS FOR THE PREPARATION OF N-ALKYLATED AROMATIC AMINO COMPOUNDS HAVING N-ALKYL GROUPS OF 5 TO 15 CARBONS WHEREIN AN AROMATIC NITROHYDROCARBON HAVING NOT MORE THAN TWO AROMATIC RINGS AND HAVING THE NITRO GROUP ON NUCLEAR CARBON IS REACTED, AT A TEMPERATURE OF 175-300* C. AND A PRESSURE OF 250-1500 ATMOSPHERES, WITH A MIXTURE OF HYDROGEN AND CARBON MONOXIDE IN MOLE RATIO VARYING FROM 5:1 TO 1:2, IN THE PRESENCE OF 5 TO 15%, BY WEIGHT OF THE AROMATIC NITROHYDROCARBON, OF A CATALYST CONSISTING ESSENTIALLY OF A CARBONYL OF AN EIGHT GROUP ELEMENT OF ATOMIC NUMBER BETWEEN 27 AND 44 AND INSOLATING SUCH N-ALKYLATED AROMATIC AMINO COMPOUND.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |