US3677932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten salt hydroconversion process
Assignee: Shell USA Inc
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Filing: 1971-03-12
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Granted: 1972-07-18
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Expires: 1991-03-12
Abstract
Abstract A NEW HYDROCONVERSION CATALYST SYSTEM COMPRISING MOLTEN ZINC HALIDE IN ADMIXTURE WITH A MODIFYING MOLTNE SALT, SUCH AS AN ALKALI METAL HALIDE, WHICH MARDKEDLY REDUCES THE SOLUBILITY OF HYDROCARBONS IN THE SALT MELT, LOWERS SALT VISCOSITY AND REDUCES TENDENCY TO FOAMING, ALL THESE CHANGES IN SALT PROPERTY BEING ESPECIALLY ADVANTAGESOUS FOR PRACTICAL APPLICATIONS IN CONTINUOUS HYDROCARBON CONVERSION PROCESSES.
Inventors
- 👤 Donald E Hardesty
- 👤 Thomas A Rodgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/40
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |