Patent US2953905A successfully refreshed from Google Patents.
US2953905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon separation
Assignee: MW Kellogg Co
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Filing: 1957-03-15
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Granted: 1960-09-27
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Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Chrones James
- 👤 Saverio G Greco
- 👤 Hanisian John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:32
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J3/0247; F25J3/0252; F25J3/0257; F25J2200/00; F25J2200/02; F25J2200/30; F25J2200/74; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/02; F25J2210/04; F25J2210/12; F25J2245/00; F25J2245/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD FOR SEPARATING HYDROCARBONS WHICH COMPRISES PASSING A HYDROCARBON MIXTURE CONTAINING C2, C3 AND C4 HYDROCARBONS TO A FIRST DISTILLATION ZONE, IN SAID FIRST DISTILLATION ZONE FRACTIONATING SAID MIXTURE TO PRODUCE AN OVERHEAD FRACTION COMPRISING C2, C3 AND C4 HYDROCARBONS AND A BOTTOMS FRACTION COMPRISING C3 AND C4 HYDROCARBONS, WITHDRAWING OVERHEAD FRACTION FROM SAID FIRST DISTILLATION ZONE AND SEPARATING C2 HYDROCARBONS THEREFROM, PASSING THE OVERHEAD FRACTION WITHDRAWN FROM SAID FIRST DISTILLATION ZONE AND FREE OF C2 HYDROCARBONS TO A SECOND DISTILLATION ZONE, WITHDRAWING BOTTOMS FRACTION FROM SAID FIRST DISTILLATION ZONE AND PASSING SAID WITHDRAWN BOTTOMS FRACTION TO SAID SECOND DISTILLATION ZONE, IN SAID SECOND DISTILLATION ZONE FRACTIONATING SAID OVERHEAD AND BOTTOMS FRACTIONS OF SAID FIRST DISTILLATION ZONE TO PRODUCE IN SAID SECOND DISTILLATION ZONE AN OVERHEAD FRACTION COMPRISING C3 HYDROCARBONS AND A BOTTOMS FRACTION COMPRISING C4 HYDROCARBONS, AND WITHDRAWING THUS FORMED OVERHEAD AND BOTTOMS FRACTIONS FROM SAID SECOND DISTILLATION ZONE.
Claim 2
Independent Claim
151 words
THE METHOD FOR SEPARATING HYDROCARBONS WHICH COMPRISES PASSING A HYDROCARBON MIXTURE CONTAINING C2, C3 AND C4 HYDROCARBONS TO A FIRST DISTILLATION ZONE, IN SAID FIRST DISTILLATION ZONE FRACTIONATING SAID MIXTURE TO PRODUCE AN OVERHEAD FRACTION COMPRISING C2, C3 AND C4 HYDROCARBONS AND A BOTTOMS FRACTION COMPRISING C3 AND C4 HYDROCARBONS, WITHDRAWING OVERHEAD FRACTION FROM SAID FIRST DISTILLATION ZONE AND SEPARATING C2 HYDROCARBONS THEREFROM, PASSING THE OVERHEAD FRACTION WITHDRAWN FROM SAID FIRST DISTILLATION ZONE AND FREE OF C2 HYDROCARBONS TO A SECOND DISTILLATION ZONE, WITHDRAWING BOTTOMS FRACTION FROM SAID FIRST DISTILLATION ZONE AND PASSING SAID WITHDRAWN BOTTOMS FRACTION TO SAID SECOND DISTILLATION ZONE, IN SAID SECOND DISTILLATION ZONE FRACTIONATING SAID OVERHEAD AND BOTTOMS FRACTIONS OF SAID FIRST DISTILLATION ZONE TO PRODUCE IN SAID SECOND DISTILLATION ZONE AN OVERHEAD FRACTION COMPRISING C3 HYDROCARBONS AND A BOTTOMS FRACTION COMPRISING C4 HYDROCARBONS, AND WITHDRAWING THUS FORMED OVERHEAD AND BOTTOMS FRACTIONS FROM SAID SECOND DISTILLATION ZONE.
References Cited (Backward Citations)
US2571329A
Cited
US2577617A
Cited
US2645104A
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US2705698A
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US2769321A
Cited
US2743590A
Cited
US2744394A
Cited
US2794334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |