Patent US3810972A successfully refreshed from Google Patents.
US3810972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of sulphur oxides
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1972-02-24
•
Granted: 1974-05-14
•
Expires: 1992-02-24
Abstract
Abstract A SUBSTRATE IS COKED BY CONTACT WITH OIL AT CRACKING TEMPERATURE, AND THE COKED SUBSTRATE IS THEN CONTACTED WITH SULPHUR OXIDES-CONTAINING GASES TO REDUCE THE SULPHUR OXIDES TO SULPHUR (WHICH IS RECOVERED) AND TO OXIDIZE COKE TO CARBON OXIDES. THE CRACKED OIL VAPORS ARE ALSO RECOVERED. THE PROCESS IS OPERATED EITHER CYCLICALLY. INTERMITTTENLY OR CONTINOUSLY.
Inventors
- 👤 R Humphrey
- 👤 G Moss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:06
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0473; C01B17/0482; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |