US2588056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of propene and propane by extractive distillation
Assignee: Sinclair Refining Co
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Filing: 1947-09-30
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Granted: 1952-03-04
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Expires: 1967-09-30
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
- 👤 Edwin W Shand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:44
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE METHOD OF SEPARATING PROPENE AND PROPANE WHICH COMPRISES EXTRACTIVELY DISTILLING THE PROPENE-PROPANE MIXTURE WITH A RELATIVELY LESS VOLATILE MULTICOMPONENT SOLVENT WHICH COMPRISES, AS A FIRST COMPONENT, ACETONITRILE, AND, AS A SECOND COMPONENT, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND MONOCHLOROACETONITRILE, SAID FIRST AND SECOND COMPONENTS BEING PRESENT IN ABOUT EQUAL VOLUME PROPORTIONS, REMOVING A VAPOR FRACTION RELATIVELY
Claim 2
Independent Claim
61 words
THE METHOD OF SEPARATING PROPENE AND PROPANE WHICH COMPRISES EXTRACTIVELY DISTILLING THE PROPENE-PROPANE MIXTURE WITH A RELATIVELY LESS VOLATILE MULTICOMPONENT SOLVENT WHICH COMPRISES, AS A FIRST COMPONENT, ACETONITRILE, AND, AS A SECOND COMPONENT, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND MONOCHLOROACETONITRILE, SAID FIRST AND SECOND COMPONENTS BEING PRESENT IN ABOUT EQUAL VOLUME PROPORTIONS, REMOVING A VAPOR FRACTION RELATIVELY
References Cited (Backward Citations)
US2379696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |