Patent US2902431A successfully refreshed from Google Patents.
US2902431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocracking of asphalt-containing materials
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-02-28
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Granted: 1959-09-01
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 James A Dinwiddie
- 👤 Max A Mosesman
- 👤 Charles L Thorpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:53
CPC Classifications
C; C10; C10G; C10G47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE HYDROCRACKING OF AN ASPHALTIC MATERIAL COMPRISING ASPHALTIC HYDROCARBONS AND LOWER BOILING NORMALLY LIQUID HYDROCARBONS WHEREIN SAID ASPHALT IS CONTACTED IN A CONVERSION ZONE WITH A FOXED BED OF CATALYST IN THE PRESENCE OF ADDED HYDROGEN AT A PRESSURE WITHIN THE RANGE OF ABOUT 300 TO 600 P.S.I.G. AND AT A TEMPERATURE IN THE RANGE OF ABOUT 775* TO 850*F., SAID CATAPYST CONSISTING OF ABOUT 10% TO 20% BY WEIGHT OF COBALT MOLYBDATE SUPPORTED ON FROM ABOUT 90 TO ABOUT 80 WEIGHT PER CENT OF SILICA GEL.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE HYDROCRACKING OF AN ASPHALTIC MATERIAL COMPRISING ASPHALTIC HYDROCARBONS AND LOWER BOILING NORMALLY LIQUID HYDROCARBONS WHEREIN SAID ASPHALT IS CONTACTED IN A CONVERSION ZONE WITH A FOXED BED OF CATALYST IN THE PRESENCE OF ADDED HYDROGEN AT A PRESSURE WITHIN THE RANGE OF ABOUT 300 TO 600 P.S.I.G. AND AT A TEMPERATURE IN THE RANGE OF ABOUT 775* TO 850*F., SAID CATAPYST CONSISTING OF ABOUT 10% TO 20% BY WEIGHT OF COBALT MOLYBDATE SUPPORTED ON FROM ABOUT 90 TO ABOUT 80 WEIGHT PER CENT OF SILICA GEL.
References Cited (Backward Citations)
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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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |