US2642424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating hydrocarbons
Assignee: —
•
Filing: —
•
Granted: 1953-06-16
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Expires: 1970-06-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:29
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07C335/00; C07C335/02; C10; C10L; C10L1/00; C10L1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN THE METHOD FOR FRACTIONATING A MIXTURE OF HYDROCARBONS WHEREIN A CRYSTALLINE COMPLEX IS FORMED BETWEEN A HYDROCARBON (I) THEREOF AND THIOUREA, SAID MIXTURE ALSO CONTAINING A HYDROCARBON (II) NOT FORMING A CRYSTALLINE COMPLEX WITH THIOUREA UNDER THE FRACTIONATING CONDITIONS, AND WHEREIN THE CRYSTALLINE COMPLEX THUS FORMED OF THIOUREA AND HYDROCARBON (I) IS SEPARATED FROM THE REMAINDER OF THE RESULTING MIXTURE, SAID HYDROCARBON (I) BEING SELECTED FROM THE GROUP CONSISTING OF: A HIGHLY BRANCHED CHAIN ALIPHATIC HYDROCARBON, A CYCLOPARAFFIN AND A CYCLOOLEFIN, SAID CYCLOPARAFFIN AND SAID CYCLOOLEFIN HAVING AT LEAST FIVE CARBON ATOMS, AND METHYL-, ISOPROPYL- AND TERTIARY BUTYL-SUBSTITUTED DERIVATIVES OF SAID CYCLOPARAFFIN AND OF SAID CYCLOOLEFIN, THE IMPROVEMENT WHICH COMPRISES: CONDUCTING SAID COMPLEX FORMATION AT A TEMPERATURE BETWEEN ABOUT -10* C. AND ABOUT -30* C.
Claim 2
Dependent Claim
126 words
IN THE METHOD FOR FRACTIONATING A MIXTURE OF HYDROCARBONS WHEREIN A CRYSTALLINE COMPLEX IS FORMED BETWEEN A HYDROCARBON (I) THEREOF AND THIOUREA, SAID MIXTURE ALSO CONTAINING A HYDROCARBON (II) NOT FORMING A CRYSTALLINE COMPLEX WITH THIOUREA UNDER THE FRACTIONATING CONDITIONS, AND WHEREIN THE CRYSTALLINE COMPLEX THUS FORMED OF THIOUREA AND HYDROCARBON (I) IS SEPARATED FROM THE REMAINDER OF THE RESULTING MIXTURE, SAID HYDROCARBON (I) BEING SELECTED FROM THE GROUP CONSISTING OF: A HIGHLY BRANCHED CHAIN ALIPHATIC HYDROCARBON, A CYCLOPARAFFIN AND A CYCLOOLEFIN, SAID CYCLOPARAFFIN AND SAID CYCLOOLEFIN HAVING AT LEAST FIVE CARBON ATOMS, AND METHYL-, ISOPROPYL- AND TERTIARY BUTYL-SUBSTITUTED DERIVATIVES OF SAID CYCLOPARAFFIN AND OF SAID CYCLOOLEFIN, THE IMPROVEMENT WHICH COMPRISES: CONDUCTING SAID COMPLEX FORMATION AT A TEMPERATURE BETWEEN ABOUT -10* C. AND ABOUT -30* C.
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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |