US2525812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination hf-treating-catalytic cracking process
Assignee: Standard Oil Co
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Filing: 1946-12-23
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Granted: 1950-10-17
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Expires: 1966-12-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 Bernard L Evering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:19
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/02; C10G11/04; C10G21/00; C10G21/06; C10G21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PROCESS FOR CONVERTING A GAS OIL CHARGING STOCK CONTAINING SULFUR COMPOUNDS AND POLYCYCLIC AROMATIC HYDROCARBONS TO LOW SULFUR GASOLINE WHILE MINIMIZING COKE FORMATION BY A COMBINATION OF STEPS COMPRISING SELECTIVE EXTRACTION OF SAID SULFUR COMPOUNDS AND POLYCYCLIC AROMATIC HYDROCARBONS FROM SAID GAS OIL CHARGING STOCK AND CRACKING CONVERSION OF THE RESULTANT PURIFIED GAS OIL WITH A SILICA-ALUMINA TYPE CATALYST, THE STEPS CONSISTING ESSENTIALLY OF CONTACTING SAID GAS OIL CHARGING STOCK WITH BETWEEN ABOUT 0.1 AND ABOUT 2 VOLUMES OF LIQUID HYDROGEN FLUORIDE PER VOLUME OF SAID CHARGING STOCK AT A TEMPERATURE BETWEEN ABOUT 50*F. AND ABOUT 150*F., STRATIFYING
Claim 2
Dependent Claim
100 words
IN A PROCESS FOR CONVERTING A GAS OIL CHARGING STOCK CONTAINING SULFUR COMPOUNDS AND POLYCYCLIC AROMATIC HYDROCARBONS TO LOW SULFUR GASOLINE WHILE MINIMIZING COKE FORMATION BY A COMBINATION OF STEPS COMPRISING SELECTIVE EXTRACTION OF SAID SULFUR COMPOUNDS AND POLYCYCLIC AROMATIC HYDROCARBONS FROM SAID GAS OIL CHARGING STOCK AND CRACKING CONVERSION OF THE RESULTANT PURIFIED GAS OIL WITH A SILICA-ALUMINA TYPE CATALYST, THE STEPS CONSISTING ESSENTIALLY OF CONTACTING SAID GAS OIL CHARGING STOCK WITH BETWEEN ABOUT 0.1 AND ABOUT 2 VOLUMES OF LIQUID HYDROGEN FLUORIDE PER VOLUME OF SAID CHARGING STOCK AT A TEMPERATURE BETWEEN ABOUT 50*F. AND ABOUT 150*F., STRATIFYING
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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) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |