US2500918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylation of hydroxylated esters
Assignee: Goodrich Corp
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Filing: 1945-08-10
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Granted: 1950-03-14
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Expires: 1965-08-10
Abstract
No abstract record available.
Inventors
- 👤 Louis F Reuter
- 👤 Syverson Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:36
CPC Classifications
C; C11; C11C; C11C3/00; C11C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN THE PROCESS OF ACYLATING CASTOR OIL WITH A SATURATED MONOBASIC FATTY ACID ANHYDRIDE CONTAINING FROM 4 TO 8 CARBON ATOMS, THE STEPS WHICH INCLUDE RAPIDLY PREHEATING A QUANTITY OF LIQUID CASTOR OIL TO A TEMPERATURE IN THE RANGE OF 175 TO 260*C., INTRODUCING VAPORS OF SAID ANHYDRIDE INTO SAID PREHEATED CASTOR OIL, MAINTAINING THE RESULTING LIQUID-VAPOR MIXTURE IN A ZONE OF REACTIVE CONTACT AT A TEMPERATURE IN SAID RANGE FOR A PERIOD OF TIME SUFFICIENT FOR SUBSTANTIAL COMPLETION OF REACTION THEREBETWEEN BUT LESS THAN 20 MINUTES, WHILE REMOVING VAPORS OF FATTY ACID FORMED BY THE REACTION FROM SAID ZONE, RAPIDLYU COOLING THE LIQUID ACETYLATED CASTOR OIL FORMED BY THE REACTION SO THAT THE TOTAL TIME DURING WHICH THE SAID CASTOR OIL REACTANT AND THE RESULTING ACYLATED PRODUCT ARE A BOVE A TEMPERATURE OF 150*C. IS LESS THAN 30 MINUTES, AND FINALLY SEPARATING THE ACETYLATED CASTOR OIL FROM ANY UNREACTED ACID ANHYDRIDE AND FROM ANY REMAINING FATTY ACID FORMED BY THE REACTION.
Claim 2
Dependent Claim
162 words
IN THE PROCESS OF ACYLATING CASTOR OIL WITH A SATURATED MONOBASIC FATTY ACID ANHYDRIDE CONTAINING FROM 4 TO 8 CARBON ATOMS, THE STEPS WHICH INCLUDE RAPIDLY PREHEATING A QUANTITY OF LIQUID CASTOR OIL TO A TEMPERATURE IN THE RANGE OF 175 TO 260*C., INTRODUCING VAPORS OF SAID ANHYDRIDE INTO SAID PREHEATED CASTOR OIL, MAINTAINING THE RESULTING LIQUID-VAPOR MIXTURE IN A ZONE OF REACTIVE CONTACT AT A TEMPERATURE IN SAID RANGE FOR A PERIOD OF TIME SUFFICIENT FOR SUBSTANTIAL COMPLETION OF REACTION THEREBETWEEN BUT LESS THAN 20 MINUTES, WHILE REMOVING VAPORS OF FATTY ACID FORMED BY THE REACTION FROM SAID ZONE, RAPIDLYU COOLING THE LIQUID ACETYLATED CASTOR OIL FORMED BY THE REACTION SO THAT THE TOTAL TIME DURING WHICH THE SAID CASTOR OIL REACTANT AND THE RESULTING ACYLATED PRODUCT ARE A BOVE A TEMPERATURE OF 150*C. IS LESS THAN 30 MINUTES, AND FINALLY SEPARATING THE ACETYLATED CASTOR OIL FROM ANY UNREACTED ACID ANHYDRIDE AND FROM ANY REMAINING FATTY ACID FORMED BY THE REACTION.
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |