Patent US2518236A successfully refreshed from Google Patents.
US2518236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of aromatic hydrocarbons
Assignee: Sunoco Inc
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Filing: 1947-05-10
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Granted: 1950-08-08
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Expires: 1967-05-10
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Hirschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:47
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR SEPARATING TWO AROMATIC HYDROCARBONS HAVING THE SAME NUMBER OF DOUBLE BONDS PER MOLECULE AND THE SAME NUMBER OF AROMATIC RINGS PER MOLECULE WHICH COMPRISES PASSING A LIQUID HYDROCARBON MIXTURE COMPOSED AT LEAST MAINLY OF SUCH AROMATIC COMPONENTS THROUGH A BODY OF ACTIVATED CARBON, THEREBY SELECTIVELY ADSORBING ONE OF SAID AROMATIC HYDROCARBONS, AND SEPARATING FROM THE ACTIVATED CARBON A FILTRATE FRACTION WHICH CONTAINS ONLY A PORTION OF THE TOTAL AROMATICS IN THE STARTING MIXTURE, THEREBY OBTAINING A PRODUCT IN WHICH THE PROPORTION OF ONE OF SAID HYDROCARBONS TO THE OTHER IS HIGHER THAN IN THE STARTING MIXTURE.
Claim 2
Dependent Claim
99 words
A PROCESS FOR SEPARATING TWO AROMATIC HYDROCARBONS HAVING THE SAME NUMBER OF DOUBLE BONDS PER MOLECULE AND THE SAME NUMBER OF AROMATIC RINGS PER MOLECULE WHICH COMPRISES PASSING A LIQUID HYDROCARBON MIXTURE COMPOSED AT LEAST MAINLY OF SUCH AROMATIC COMPONENTS THROUGH A BODY OF ACTIVATED CARBON, THEREBY SELECTIVELY ADSORBING ONE OF SAID AROMATIC HYDROCARBONS, AND SEPARATING FROM THE ACTIVATED CARBON A FILTRATE FRACTION WHICH CONTAINS ONLY A PORTION OF THE TOTAL AROMATICS IN THE STARTING MIXTURE, THEREBY OBTAINING A PRODUCT IN WHICH THE PROPORTION OF ONE OF SAID HYDROCARBONS TO THE OTHER IS HIGHER THAN IN THE STARTING MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |