US2594481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of alcohols
Assignee: Standard Oil Co
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Filing: 1948-09-30
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Granted: 1952-04-29
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Expires: 1968-09-30
Abstract
No abstract record available.
Inventors
- 👤 Norman J Bowman
- 👤 Alfred W Weitkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:47
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/88; C07C29/92; C07C67/00; C07C67/14; C07C67/48; C07C67/52; C07C67/54; C07C67/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN A PROCESS OF SEPARATING AN ALIPHATIC ALCOHOL, UNBRANCED EXCEPT FOR A MAXIMUM OF ONE METHYL GROUP, FROM A MIXTURE THEREOF WITH A UREA-UNREACTIVE ORGANIC COMPOUND, THE STEPS WHICH COMPRISE CONVERTING SAID ALCOHOL IN SAID MIXTURE INTO A MONOMETHYL-BRANCED ALIPHATIC ESTER WHEREIN THE STRAIGHT-CHAIN TERMINAL PORTION CONTAINING THE CHARACTERISTIC CARBONYLOXY GROUP CONTAINS ALSO A TOTAL OF AT LEAST FOUR MEHTYLENE GROUPS, CONTACTING SAID MIXTURE WITH UREA, AND WITHDRAWING A SOLID ADDUCT CONTAINING UREA AND SAID ESTER.
Claim 2
Dependent Claim
76 words
IN A PROCESS OF SEPARATING AN ALIPHATIC ALCOHOL, UNBRANCED EXCEPT FOR A MAXIMUM OF ONE METHYL GROUP, FROM A MIXTURE THEREOF WITH A UREA-UNREACTIVE ORGANIC COMPOUND, THE STEPS WHICH COMPRISE CONVERTING SAID ALCOHOL IN SAID MIXTURE INTO A MONOMETHYL-BRANCED ALIPHATIC ESTER WHEREIN THE STRAIGHT-CHAIN TERMINAL PORTION CONTAINING THE CHARACTERISTIC CARBONYLOXY GROUP CONTAINS ALSO A TOTAL OF AT LEAST FOUR MEHTYLENE GROUPS, CONTACTING SAID MIXTURE WITH UREA, AND WITHDRAWING A SOLID ADDUCT CONTAINING UREA AND SAID ESTER.
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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |