Patent US3663429A successfully refreshed from Google Patents.
US3663429A
Expired / Lapsed
US
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Process for hydroconversion of raw shale oil
Assignee: Atlantic Richfield Co
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Filing: 1970-04-09
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Granted: 1972-05-16
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Expires: 1990-04-09
Abstract
Abstract THE PROCESS OF CATALYTICALLY HYDROGENATING AND/OR HYDROCRACKING RAW SHALE OIL IS IMPROVED BY INCORPORATING IN THE FEEDSTOCK A HEAVY MINERAL OIL SUCH AS HIGH BOILING SHALE OIL FRACTIONS AND HIGH BOILING PRETROLEUM FRACTIONS OF DESIRABLE PROPERTIES TO PREVENT SUBSTANTIAL AMOUNTS OF DEPOSITS FROM ACCUMULATING IN THE PREHEATER AND IN THE REACTOR CATALYST BED.
Inventors
- 👤 Barney Vallino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:19
CPC Classifications
C; C10; C10G; C10G47/00
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |