US2844609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of amides
Assignee: Onyx Oil and Chemical Co
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Filing: 1955-06-29
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Granted: 1958-07-22
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Expires: 1975-06-29
Abstract
No abstract record available.
Inventors
- 👤 Giuliana C Tesoro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
C; C07; C07C; C07C231/00; C07C231/02; C07C233/00; C07C233/01; C07C233/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF PRODUCING AMIDES FROM HIGHER FATTY ACID ESTERS OF THE CLASS CONSISTING OF THE LOWER ALKANOL ESTERS AND GLYCERIDE ESTERS OF HIGHER FATTY ACIDS AND HIGH BOILING ALKANOLAMINES OF THE CLASS CONSISTING OF PRIMARY AND SECONDARY ALKANOLAMINES WHICH COMPRISES HEATING A MIXTURE OF THE HIGH BOILING ALKANOLAMINE AND A SODIUM METHOXIDE CATALYST TO A TEMPERATURE OF ABOUT 55*-75*C. AND GRADUALLY ADDING THE COLD FATTY ACID ESTER TO THE AMINE AND CATALYST WHILE MAINTAINING A VACUUM.
Claim 2
Independent Claim
77 words
THE METHOD OF PRODUCING AMIDES FROM HIGHER FATTY ACID ESTERS OF THE CLASS CONSISTING OF THE LOWER ALKANOL ESTERS AND GLYCERIDE ESTERS OF HIGHER FATTY ACIDS AND HIGH BOILING ALKANOLAMINES OF THE CLASS CONSISTING OF PRIMARY AND SECONDARY ALKANOLAMINES WHICH COMPRISES HEATING A MIXTURE OF THE HIGH BOILING ALKANOLAMINE AND A SODIUM METHOXIDE CATALYST TO A TEMPERATURE OF ABOUT 55*-75*C. AND GRADUALLY ADDING THE COLD FATTY ACID ESTER TO THE AMINE AND CATALYST WHILE MAINTAINING A VACUUM.
References Cited (Backward Citations)
US2464094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |