Patent US3796653A successfully refreshed from Google Patents.
US3796653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent deasphalting and non-catalytic hydrogenation
Assignee: Universal Oil Products Co
•
Filing: 1972-07-03
•
Granted: 1974-03-12
•
Expires: 1992-07-03
Abstract
Abstract AN ASPHALTENE-CONTAINING HYDROCARBONACEOUS CHARGE STOCK IS PRETREATED VIA A COMBINATION PROCESS TO PREPARE A SUITABLE HYDRODESULFURIZATION FEED STOCK. THE COMBINATION PROCESS INVOLVES THE INTEGRATION OF (I) NON-CATALYTIC HYDROGENATIVE CONVERSION (HYDROCRACKING) AT CONDITIONS WHICH MINIMIZE COKE-FORMING THERMAL CRACKING REACTINS AND (2) SOLVENT EXTRACTION OF THE RESULTING PRODUCT EFFLUENT WITH RECOVERY OF A SUBSTANTIALLY ASPHALTENE-FREE FEED STOCK
Inventors
- 👤 J Gatsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:39
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/22; C10G67/00; C10G67/02; C10G67/04; C10G67/0454; C10G67/049
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |