US2821543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of unsaturated aliphatic esters
Assignee: Celanese Corp
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Filing: 1955-01-10
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Granted: 1958-01-28
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Expires: 1975-01-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert W Etherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:36
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
PROCESS FOR THE PRODUCTION OF UNSATURATED ESTERS WHICH COMPRISES REACTING, IN THE VAPOR PHASE AND AT ELEVATED TEMPERATURE, FORMALDEHYDGE AND AN ESTER OF AN ALKANOL AND AN ALKANOIC ACID, SAID ACID HAVING A PLURALITY OF CARBON ATOMS AND HAVING A PLURALITY OF HYDROGEN ATOMS ON ITS ALPHA CARBON ATOM, IN THE PRESENCE OF A SOLID FLUIDIZED CATALYST FOR THE REACTION, THE PROPORTIONS OF THE REACTANTS BEING ABOUT 0.3 TO 3 MOLS OF FORMALDEHYDE FOR EACH MOL OF SAID ALKANOIC ESTER, TO PRODUCE AN ESTER OF AN A,B-ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID CONTAINING ONE MORE CARBON ATOM THAN THE ACID OF THE ESTER USED AS A RECTANT.
Claim 2
Dependent Claim
105 words
PROCESS FOR THE PRODUCTION OF UNSATURATED ESTERS WHICH COMPRISES REACTING, IN THE VAPOR PHASE AND AT ELEVATED TEMPERATURE, FORMALDEHYDGE AND AN ESTER OF AN ALKANOL AND AN ALKANOIC ACID, SAID ACID HAVING A PLURALITY OF CARBON ATOMS AND HAVING A PLURALITY OF HYDROGEN ATOMS ON ITS ALPHA CARBON ATOM, IN THE PRESENCE OF A SOLID FLUIDIZED CATALYST FOR THE REACTION, THE PROPORTIONS OF THE REACTANTS BEING ABOUT 0.3 TO 3 MOLS OF FORMALDEHYDE FOR EACH MOL OF SAID ALKANOIC ESTER, TO PRODUCE AN ESTER OF AN A,B-ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID CONTAINING ONE MORE CARBON ATOM THAN THE ACID OF THE ESTER USED AS A RECTANT.
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |