Patent US3112571A successfully refreshed from Google Patents.
US3371032A
Expired / Lapsed
US
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Fractionation of alkylation effluent
Assignee: Universal Oil Products Co
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Filing: 1966-11-14
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Granted: 1968-02-27
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Paul A Witt
- 👤 James E Gantt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:40
CPC Classifications
C; C07; C07C; C07C9/00; C07C9/14; C07C9/16; C07C7/00; C07C7/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
METHOD FOR SEPARATING A HYDROCARBON FEED MIXTURE CONTAINING C3 HYDROCARBONS, ISO-BUTANE, N-BUTANE AND ALKYLATE BY FRACTIONATION MEANS COMPRISING: (A) INTRODUCING SAID FEED MIXTURE INTO A SINGLE DISTILLATION COLUMN MAINTAINED UNDER DISTILLATION CONDITIONS AT AN INTERMEDIATE LOCUS THEREOF; (B) WITHDRAWING AN OVERHEAD STREAM COMPRISING HYDROCARBONS HAVING LESS THAN 4 CARBON ATOMS PER MOLECULE; (C) WITHDRAWING AN UPPER SIDE-CUT LIQUID STREAM COMPRISING ISO-BUTANE AT A LOCUS ABOVE SAID INTERMEDIATE LOCUS;
Claim 2
Dependent Claim
68 words
METHOD FOR SEPARATING A HYDROCARBON FEED MIXTURE CONTAINING C3 HYDROCARBONS, ISO-BUTANE, N-BUTANE AND ALKYLATE BY FRACTIONATION MEANS COMPRISING: (A) INTRODUCING SAID FEED MIXTURE INTO A SINGLE DISTILLATION COLUMN MAINTAINED UNDER DISTILLATION CONDITIONS AT AN INTERMEDIATE LOCUS THEREOF; (B) WITHDRAWING AN OVERHEAD STREAM COMPRISING HYDROCARBONS HAVING LESS THAN 4 CARBON ATOMS PER MOLECULE; (C) WITHDRAWING AN UPPER SIDE-CUT LIQUID STREAM COMPRISING ISO-BUTANE AT A LOCUS ABOVE SAID INTERMEDIATE LOCUS;
References Cited (Backward Citations)
US2990437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |