Patent US2643971A successfully refreshed from Google Patents.
US2643971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination hf treating catalytic cracking process
Assignee: Standard Oil Co
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Filing: 1950-06-14
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Granted: 1953-06-30
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Expires: 1970-06-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 Bernard L Evering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:33
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF OBTAINING VALUABLE PRODUCTS FROM A HYDROCARBON CHARGING STOCK WHICH IS HIGHER BOILING THAN GASOLINE AND WHICH CONTAINS SUBSTANTIAL AMOUNTS OF POLYCYCLIC AROMATICS WHICH ARE INSOLUBLE IN HYDROGEN FLUORIDE BUT WHICH ARE CONDENSABLE IN THE PRESENCE OF HYDROGEN FLUORIDE INTO HIGHER MOLECULAR WEIGHT HYDROGEN FLUORIDE-SOLUBLE HYDROCARBONS WITH LIBERATION OF HYDROGEN, WHICH METHOD COMPRISES TREATING SAID CHARGING STOCK WITH A CATALYST CONSISTING ESSENTIALLY OF HYDROGEN FLUORIDE IN A FIRST CONVERSION ZONE AT A TEMPERATURE ABOVE 150* F. BUT NOT SUBSTANTIALLY ABOVE 40* F. UNDER CONDITIONS FOR EFFECTING INTERMOLECULAR CHEMICAL CONDENSATION OF SAID POLYCYCLIC AROMATIC HYDROCARBONS INTO HYDROGEN FLUORIDE-SOLUBLE CONDENSED AROMATICS OF HIGHER MOLECULAR WEIGHT WITH SIMULTANEOUS LIBERATION OF HYDROGEN, SEPARATING THE CONDENSED POLYCYCLIC AROMATICS AND THE HYDROGEN FLUORIDE IN WHICH THEY ARE DISSOLVED FROM HYDRO-
Claim 2
Independent Claim
126 words
THE METHOD OF OBTAINING VALUABLE PRODUCTS FROM A HYDROCARBON CHARGING STOCK WHICH IS HIGHER BOILING THAN GASOLINE AND WHICH CONTAINS SUBSTANTIAL AMOUNTS OF POLYCYCLIC AROMATICS WHICH ARE INSOLUBLE IN HYDROGEN FLUORIDE BUT WHICH ARE CONDENSABLE IN THE PRESENCE OF HYDROGEN FLUORIDE INTO HIGHER MOLECULAR WEIGHT HYDROGEN FLUORIDE-SOLUBLE HYDROCARBONS WITH LIBERATION OF HYDROGEN, WHICH METHOD COMPRISES TREATING SAID CHARGING STOCK WITH A CATALYST CONSISTING ESSENTIALLY OF HYDROGEN FLUORIDE IN A FIRST CONVERSION ZONE AT A TEMPERATURE ABOVE 150* F. BUT NOT SUBSTANTIALLY ABOVE 40* F. UNDER CONDITIONS FOR EFFECTING INTERMOLECULAR CHEMICAL CONDENSATION OF SAID POLYCYCLIC AROMATIC HYDROCARBONS INTO HYDROGEN FLUORIDE-SOLUBLE CONDENSED AROMATICS OF HIGHER MOLECULAR WEIGHT WITH SIMULTANEOUS LIBERATION OF HYDROGEN, SEPARATING THE CONDENSED POLYCYCLIC AROMATICS AND THE HYDROGEN FLUORIDE IN WHICH THEY ARE DISSOLVED FROM HYDRO-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |