US2640070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Higher alkyl ester production
Assignee: Shell Development Co
•
Filing: 1950-06-26
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Granted: 1953-05-26
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Expires: 1970-06-26
Abstract
No abstract record available.
Inventors
- 👤 Edouard A M F Dahmen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:31
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A PROCESS OF ESTERIFYING AN OLEFIN HAVING AT LEAST FIVE CARBON ATOMS PER MOLECULE WITH A STRONG POLYBASIC INORGANIC OXY-ACID, THE IMPROVEMENT WHICH COMPRISES ESTERIFYING SAID OLEFIN BY REACTION WITH SAID ACID IN THE PRESENCE OF ABOUT 0.5% TO 10% BY WEIGHT OF SAID OLEFIN OF AN ORGANIC COMPOUND OF THE GROUP CONSISTING OF HYDROXYL COMPOUNDS HAVING A ALIPHATIC GROUP CONTAINING AT LEAST FIVE CARBON ATOMS AND SULFITE ESTERS OF SAID HYDROXYL COMPOUNDS.
Claim 2
Dependent Claim
74 words
IN A PROCESS OF ESTERIFYING AN OLEFIN HAVING AT LEAST FIVE CARBON ATOMS PER MOLECULE WITH A STRONG POLYBASIC INORGANIC OXY-ACID, THE IMPROVEMENT WHICH COMPRISES ESTERIFYING SAID OLEFIN BY REACTION WITH SAID ACID IN THE PRESENCE OF ABOUT 0.5% TO 10% BY WEIGHT OF SAID OLEFIN OF AN ORGANIC COMPOUND OF THE GROUP CONSISTING OF HYDROXYL COMPOUNDS HAVING A ALIPHATIC GROUP CONTAINING AT LEAST FIVE CARBON ATOMS AND SULFITE ESTERS OF SAID HYDROXYL COMPOUNDS.
References Cited (Backward Citations)
US2049055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |