US3629159A
Expired / Lapsed
US
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Regeneration of spent zinc halide catalyst using preliminary high pressure hydrogen solvent extraction
Assignee: Consolidation Coal Co
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Filing: 1969-12-03
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Granted: 1971-12-21
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Expires: 1989-12-03
Abstract
Abstract SPENT ZINC HALIDE HYDROCRACKING CATALYST IS CONTACTED WITH A NONPOLAR HYDROCARBON SOLVENT IN THE PRESENCE OF HIGH PRESSURE HYDROGEN TO EXTRACT UNCONVERTED HYDROCARBONACEOUS RESIDUE FROM THE SPENT CATALYST.
Inventors
- 👤 Everett Gorin
- 👤 Robert T Struck
- 👤 Metro D Kulik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:22
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/08; B; B01; B01J; B01J27/00; B01J27/06
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |