US3591489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage desulfurization utilizing hydrogen in the second stage reaction
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1969-01-24
•
Granted: 1971-07-06
•
Expires: 1989-01-24
Abstract
Abstract PETROLEUM FRACTIONS BOILING ABOVE 200*F. ARE DESULFURIZED IN TWO STAGES IN THE PRESENCE OF A SULFUR-RESISTANT CATALYST, THE FIRST STAGE BEING CARRIED OUT IN THE ABSENCE OF HYDROGEN AND THE SECOND IN THE PRESENCE OF HYDROGEN. THE CATALYST DEACTIVATES RAPIDLY IN THE FIRST STAGE AND IS REGENERATED BY STRIPPING WITH HYDROGEN OR MIXTURES OF HYDROGEN AND HYDROGEN SULFIDE.
Inventors
- 👤 Clark E Adams
- 👤 Charles N Kimberlin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |