Patent US5649029A successfully refreshed from Google Patents.
US2644009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous esterification process
Assignee: Distillers Co Yeast Ltd
•
Filing: 1949-10-06
•
Granted: 1953-06-30
•
Expires: 1969-10-06
Abstract
No abstract record available.
Inventors
- 👤 Cash Wilfrid Ernest
- 👤 Gell William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:24
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J14/00; C; C07; C07C; C07C67/00; C07C67/08; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/00065; B01J2219/00074; B01J2219/00076; B01J2219/00083; B01J2219/00121; B01J2219/00128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR THE PRODUCTION OF AN ESTER WHICH COMPRISES PASSING A MIXTURE OF A MONOHYDRIC ALCOHOL AND AN ORGANIC REAGENT TOGETHER WITH AN ESTERIFICATION CATALYST CONCURRENTLY THROUGH A SERIES OF CONSECUTIVE REACTION ZONES OF WHICH AT LEAST THREE ARE SEPARATELY HEATED, SAID REAGENT BEING SUFFICIENTLY NON-VOLATILE TO PERMIT REMOVAL OF THE HYDROXY COMPOUND PRODUCED BY THE ESTERIFICATION OF THE ALCOHOL WITH THE REAGENT WITHOUT REMOVAL OF SAID REAGENT, SAID REAGENT BEING SELECTED FROM THE GROUP CONSISTING OF ACIDS, ACID ANHYDRIDES, ACID ESTERS AND NEUTRAL ESTERS OF RELATIVELY VOLATILE ALCOHOLS, INTRODUCING FRESH ENTRAINER INTO SAID MIXTURE IN EACH OF SAID HEATED ZONES AND VOLATILLIZING AND REMOVING SAID HYDROXY COMPOUND AND ENTRAINER FROM EACH REACTION ZONE WITHOUT PASSING THE VAPOUR THEREOF THROUGH THE LIQUID REACTION MIXTURE IN ANY OTHER REACTION ZONE.
Claim 2
Dependent Claim
130 words
A PROCESS FOR THE PRODUCTION OF AN ESTER WHICH COMPRISES PASSING A MIXTURE OF A MONOHYDRIC ALCOHOL AND AN ORGANIC REAGENT TOGETHER WITH AN ESTERIFICATION CATALYST CONCURRENTLY THROUGH A SERIES OF CONSECUTIVE REACTION ZONES OF WHICH AT LEAST THREE ARE SEPARATELY HEATED, SAID REAGENT BEING SUFFICIENTLY NON-VOLATILE TO PERMIT REMOVAL OF THE HYDROXY COMPOUND PRODUCED BY THE ESTERIFICATION OF THE ALCOHOL WITH THE REAGENT WITHOUT REMOVAL OF SAID REAGENT, SAID REAGENT BEING SELECTED FROM THE GROUP CONSISTING OF ACIDS, ACID ANHYDRIDES, ACID ESTERS AND NEUTRAL ESTERS OF RELATIVELY VOLATILE ALCOHOLS, INTRODUCING FRESH ENTRAINER INTO SAID MIXTURE IN EACH OF SAID HEATED ZONES AND VOLATILLIZING AND REMOVING SAID HYDROXY COMPOUND AND ENTRAINER FROM EACH REACTION ZONE WITHOUT PASSING THE VAPOUR THEREOF THROUGH THE LIQUID REACTION MIXTURE IN ANY OTHER REACTION ZONE.
References Cited (Backward Citations)
US1854731A
Cited
US1960855A
Cited
US2246264A
Cited
US2384793A
Cited
US2460083A
Cited
US2426968A
Cited
US2457111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |