US2843607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing esters
Assignee: Air Liquide SA
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Filing: 1954-11-23
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Granted: 1958-07-15
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Expires: 1974-11-23
Abstract
No abstract record available.
Inventors
- 👤 Servigne Marcel
- 👤 Szarvasi Etienne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:50
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07D307/24; C07C; C07C67/00; C07C67/48; C07C67/52; C07C67/54; C07C67/56; C07D307/10; C07D307/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IMPROVEMENT IN THE PROCESS OF PREPARING ESTERS BY REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACETIC ANHYDRIDE AND FUROIC ACID WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HEPTADEHYDE, CINNAMIC ALDEHYDE, FURFURAL, ACETALDEHYDE, ETHYL ALCOHOL, PROPYL ALCOHOL, AND HEPTYL ALCOHOL, COMPRISING THE STEPS OF: SIMULTANEOUSLY ESTERIFYING AND HYDROGENATING THE REACTANTS IN THE SAME REACTION STAGE BY HEATING THEM TOGETHER IN THE PRESENCE OF HYDROGEN AND A HYDROGENATION CATALYST, AND THEREAFTER SEPARATING THE DESIRED ESTER PRODUCT FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
82 words
IMPROVEMENT IN THE PROCESS OF PREPARING ESTERS BY REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACETIC ANHYDRIDE AND FUROIC ACID WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HEPTADEHYDE, CINNAMIC ALDEHYDE, FURFURAL, ACETALDEHYDE, ETHYL ALCOHOL, PROPYL ALCOHOL, AND HEPTYL ALCOHOL, COMPRISING THE STEPS OF: SIMULTANEOUSLY ESTERIFYING AND HYDROGENATING THE REACTANTS IN THE SAME REACTION STAGE BY HEATING THEM TOGETHER IN THE PRESENCE OF HYDROGEN AND A HYDROGENATION CATALYST, AND THEREAFTER SEPARATING THE DESIRED ESTER PRODUCT FROM THE REACTION MIXTURE.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |