Patent US2789087A successfully refreshed from Google Patents.
US2789087A
Expired / Lapsed
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Separation of cyclic and acyclic hydrocarbons with perfluorocarbons
Assignee: Phillips Petroleum Co
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Filing: 1950-12-20
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Granted: 1957-04-16
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Expires: 1970-12-20
Abstract
No abstract record available.
Inventors
- 👤 Martin R Cines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:50
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR SEPARATING HYDROCARBON MIXTURES COMPRISING AROMATIC AND NON-AROMATIC COMPONENTS WHICH ARE ORDINARILY NOT SEPARABLE BY SIMPLE FRACTIONAL DISTILLATION WHICH COMPRISES AZEOTROPICALLY DISTILLING SAID MIXTURE IN THE PRESENCE OF SUFFICIENT OF AN ADDED PERFLUOROCARBON SELECTED FROM THE GROUP CONSISTING OF PERFLUOROMETHYLCYCLOHEXANE, PERFLUORO-N-HEPTANE, AND PERFLUOROCYCLOHEXANE TO VAPORIZE THE AROMATIC COMPONENT
Claim 2
Dependent Claim
50 words
A PROCESS FOR SEPARATING HYDROCARBON MIXTURES COMPRISING AROMATIC AND NON-AROMATIC COMPONENTS WHICH ARE ORDINARILY NOT SEPARABLE BY SIMPLE FRACTIONAL DISTILLATION WHICH COMPRISES AZEOTROPICALLY DISTILLING SAID MIXTURE IN THE PRESENCE OF SUFFICIENT OF AN ADDED PERFLUOROCARBON SELECTED FROM THE GROUP CONSISTING OF PERFLUOROMETHYLCYCLOHEXANE, PERFLUORO-N-HEPTANE, AND PERFLUOROCYCLOHEXANE TO VAPORIZE THE AROMATIC COMPONENT
References Cited (Backward Citations)
US2348726A
Cited
US2290636A
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US2376104A
Cited
US2432771A
Cited
US2477303A
Cited
US2442589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |