US3654129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrorefining of coke-forming hydrocarbon distillates
Assignee: Universal Oil Products Co
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Filing: 1970-04-20
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Granted: 1972-04-04
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Expires: 1990-04-20
Abstract
Abstract AN OLEFIN POLYMERIZATION INHIBITOR IS ADDED TO AN UNSATURATED COKE-FORMING HYDROCARON DISTILLATE PRIO TO SUBJECTING THE SAME TO HYDROREFINING, TO RETARD THE THERMAL POLYMERIZATION CHAINS SUFFICIENTLY TO INSURE FORMATION ONLY OF SOLUBLE POLYMERS AND THEREAFTER HYDROGENATING SAID SOLUBLE POLYMERS IN A HYDROEFINING (HYDROGULATION ZONE. SUITABEL INHIBITORS ARE SELECTED FROM THE GROUP CONSISTING OF PHENOLS, AROMATIC AMINES AND THIOPHENOLS, AND ARE EMPLOYED IN AN AMOUNT OF FROM 0.005% TO 1.0% BY WEIGHT OF THE HYDROCARBONACEOUS CHARGE STOCK.
Inventors
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:03
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/005
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |