US3679577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten salt hydrofining process
Assignee: Shell USA Inc
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Filing: 1968-11-29
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Granted: 1972-07-25
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Expires: 1988-11-29
Abstract
Abstract A PROCESS FOR CONVERSION OF HEAVY HYDROCARBON FRACTIONS CONTAINING HETERO-ATOM IMPURITIES COMPRISING CONTACTING THE FRACTIONS IN THE PRESENCE OF HYDROGEN, AT ELEVATED TEMPERATURE AND PRESSURE WITH A MOLTEN SALT COMPRISING CADMIUM HALIDES, AN ALKALI METAL HALIDE AND OPTIONALLY ONE OR MORE ADDITIONAL SALTS AS DILUENTS OR CO-CATALYSTS.
Inventors
- 👤 Charles F Wantland
- 👤 Frank E Juge Jr
- 👤 William H Hinds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/08; C10G2300/00; C10G2300/10; C10G2300/107
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |