Patent US4284374A successfully refreshed from Google Patents.
Patent US2959540A successfully refreshed from Google Patents.
US2959540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light ends absorption system
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1958-12-02
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Granted: 1960-11-08
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Expires: 1978-12-02
Abstract
No abstract record available.
Inventors
- 👤 Robert P Cahn
- 👤 Arthur L Baron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:50
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN A PROCESS WHEREIN AN INITIAL STREAM OF RELATIVELY LIGHT HYDROCARBONS WHICH CONTAINS SOME C5 AND HIGHER CONSTITUENTS IS TO BE SEPARATED INTO COMPONENT FRACTIONS, WHEREIN SAID C5 AND HIGHER CONSTITUENTS ARE REMOVED FROM SAID LIGHT HYDROCARBONS BY ABSORPTION IN AN OIL STREAM, AND WHEREIN ISOBUTANE IS EMPLOYED TO CONTACT SAID LIGHT HYDROCARBONS IN A TREATING ZONE AFTER REMOVAL OF SAID C5 AND HIGHER CONSTITUENTS, A MINOR PORTION OF SAID ISOBUTANE PASSING OVERHEAD FROM SAID TREATING ZONE, THE IMPROVED METHOD OF SEPARATING LIGHT HYDROCARBONS WHICH COMPRISES, CONTACTING THE OVERHEAD OF SAID TREATING ZONE WITH A SPONGE OIL HAVING A BOILING POINT OF AT LEAST 200*F. SO AS TO ABSORB ISOBUTANE IN SAID SPONGE OIL, THEREAFTER CONTACTING SAID SPONGE OIL CONTAINING ISOBUTANE WITH SAID INITIAL STREAM IN AN ABSORPTION ZONE SO AS TO VAPORIZE ISOBUTANE WHILE ABSORBING C5 AND HIGHER CONSTITUENTS, REMOVING SPONGE OIL CONTAINING C5 AND HIGHER CONSTITUENTS FROM SAID ABSORPTION ZONE, AND RE-
Claim 2
Dependent Claim
154 words
IN A PROCESS WHEREIN AN INITIAL STREAM OF RELATIVELY LIGHT HYDROCARBONS WHICH CONTAINS SOME C5 AND HIGHER CONSTITUENTS IS TO BE SEPARATED INTO COMPONENT FRACTIONS, WHEREIN SAID C5 AND HIGHER CONSTITUENTS ARE REMOVED FROM SAID LIGHT HYDROCARBONS BY ABSORPTION IN AN OIL STREAM, AND WHEREIN ISOBUTANE IS EMPLOYED TO CONTACT SAID LIGHT HYDROCARBONS IN A TREATING ZONE AFTER REMOVAL OF SAID C5 AND HIGHER CONSTITUENTS, A MINOR PORTION OF SAID ISOBUTANE PASSING OVERHEAD FROM SAID TREATING ZONE, THE IMPROVED METHOD OF SEPARATING LIGHT HYDROCARBONS WHICH COMPRISES, CONTACTING THE OVERHEAD OF SAID TREATING ZONE WITH A SPONGE OIL HAVING A BOILING POINT OF AT LEAST 200*F. SO AS TO ABSORB ISOBUTANE IN SAID SPONGE OIL, THEREAFTER CONTACTING SAID SPONGE OIL CONTAINING ISOBUTANE WITH SAID INITIAL STREAM IN AN ABSORPTION ZONE SO AS TO VAPORIZE ISOBUTANE WHILE ABSORBING C5 AND HIGHER CONSTITUENTS, REMOVING SPONGE OIL CONTAINING C5 AND HIGHER CONSTITUENTS FROM SAID ABSORPTION ZONE, AND RE-
References Cited (Backward Citations)
US2324954A
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US2439021A
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US2710278A
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US2745889A
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US2848522A
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US2857018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |