US2813124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of secondary aromatic amines
Assignee: Individual
•
Filing: 1955-04-18
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Granted: 1957-11-12
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Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Rip G Rice
- 👤 Earl J Kohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:45
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN THE METHOD OF ALKYLATING PRIMARY AROMATIC AMINES WITH PRIMARY ALIPHATIC ALCOHOLS TO FORM SECONDARY AMINES, THE IMPROVEMENT WHICH COMPRISES HEATING THE AROMATIC AMINE TO REFLUX AT ATMOSPHERIC PRESSURE WITH AN AMOUNT OF RANEY NICKEL WHICH IS FROM ABOUT 0.5 TO 6 PARTS BY WEIGHT PER PART OF PRIMARY AMINO GROUP IN THE AROMATIC AMINE AND AN EXCESS OF PRIMARY ALCOHOL OF THE GENERAL FORMULA ROH WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF ALKYL RADICALS HAVING AT LEAST 2 CARBON ATOMS AND ARALKYL RADICALS, SAID PRIMARY AROMATIC AMINE BEING FREE FROM GROUPS WHICH UNDERGO REDUCTION IN THE REACTION.
Claim 2
Dependent Claim
101 words
IN THE METHOD OF ALKYLATING PRIMARY AROMATIC AMINES WITH PRIMARY ALIPHATIC ALCOHOLS TO FORM SECONDARY AMINES, THE IMPROVEMENT WHICH COMPRISES HEATING THE AROMATIC AMINE TO REFLUX AT ATMOSPHERIC PRESSURE WITH AN AMOUNT OF RANEY NICKEL WHICH IS FROM ABOUT 0.5 TO 6 PARTS BY WEIGHT PER PART OF PRIMARY AMINO GROUP IN THE AROMATIC AMINE AND AN EXCESS OF PRIMARY ALCOHOL OF THE GENERAL FORMULA ROH WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF ALKYL RADICALS HAVING AT LEAST 2 CARBON ATOMS AND ARALKYL RADICALS, SAID PRIMARY AROMATIC AMINE BEING FREE FROM GROUPS WHICH UNDERGO REDUCTION IN THE REACTION.
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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |