US3681231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Higher conversion hydrogenation
Assignee: HRI Inc
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Filing: 1971-02-10
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Granted: 1972-08-01
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Expires: 1991-02-10
Abstract
Abstract A PROCESS FOR THE HYDROGENATION OF A PETROLEUM RESIDUUM FEED MATERIAL CONTAINING AT LEAST 25 VOLUME PERCENT MATERIAL BOILING ABOVE 975*F. AND GREATER THAN 5 WEIGHT PERCENT ASPHALTENES BY REACTING THE FEED WITH A HYDROGEN RICH GAS AT ELEVATED TEMPERATURES AND PRESSURES IN AN EBULLATED CATALYTIC BED REACTOR WHEREIN SAID FEED MATERIAL IS BLENDED WITH AN AROMATIC DILUENT HAVING A GRAVITY OF LESS THAN 16* APL, A WATSON CHARACTERIZATION FACTOR OF LESS THAN 11.2 AND A BOILING POINT WITHIN THE RANGE OF FROM ABOUT 700*F. TO ABOUT 1000*F., PRIOR TO HYDROGENATION.
Inventors
- 👤 Seymour B Alpert
- 👤 Ronald H Wolk
- 👤 Michael C Chervenak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:02
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/10; C10G49/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |