US3595965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of petroleum coke
Assignee: Texaco Inc
•
Filing: 1969-06-27
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Granted: 1971-07-27
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Expires: 1989-06-27
Abstract
Abstract PURIFICATION OF PETROLEUM COKE HIGH IN SULFUR AND CONTAINING METALLIC IMPURITIES BY PASSING AN EXCESS OF SYNTHESIS GAS IN CONTACT WITH THE PREOXIDIZED COKE AT A TEMPERATURE AND PRESSURE AT WHICH THE CARBON MONOXIDE OF THE SYNTHESIS GAS IS CAUSED TO COMBINE WITH THE METALS, UNDER THE CATALYTIC EFFECT OF THE SULFUR IN THE COKE, TO FORM GASIFORM METAL CARBONYLS WHICH ARE READILY SEPARATED. THE RESULTING SYNTHESIS GAS IS THEN USED TO HYDRODESULFURIZE THE COKE UNDER APPROPRIATE CONDITIONS.
Inventors
- 👤 William F Franz
- 👤 Howard V Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:10
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/02; C10B; C10B55/00
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |