Patent US2644839A successfully refreshed from Google Patents.
US2644839A
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Catalytic esterification process
Assignee: FMC Corp
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Filing: 1947-06-18
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Granted: 1953-07-07
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Expires: 1967-06-18
Abstract
No abstract record available.
Inventors
- 👤 Albert C Zettlemoyer
- 👤 William C Walker
- 👤 William L Stump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:17
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/02; C07C69/12; C07C67/00; C07C67/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
IN THE CATALYTIC PRODUCTION OF ESTERS FROM ORGANIC ACIDS AND ALCOHOLS AT HIGH TEMPERATURES, THE IMPROVEMENT WHICH COMPRISES CONDUCTNG MIXED VAPORS CONTAINING THE ACID AND ALCOHOL THROUGH A REACTION ZONE IN CONTACT WITH A HOT FINELY DIVIDED SOLID CATALYTIC MATERIAL COMPOSED OF AN ADSORBENT CARRIER CONTAINING AN ORGANIC SALT OF A HEAVY METAL SELECTED FROM THE GROUP CONSISTING OF LEAD, ZINC AND FERRIC IRON, WITH AN UNSUBSTITUTED CARBOXYLIC ACID, THE ACID RADICAL OF WHICH IS THAT OF THE SAME ACID USED FOR REACTING WITH THE ALCOHOL.
References Cited (Backward Citations)
GB511132A
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CA428307A
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GB131088A
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US1819818A
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US1841430A
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US1881563A
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US2062918A
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US2401261A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |