Patent US3595780A successfully refreshed from Google Patents.
US3595780A
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US
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Process for stabilization of diolefin-containing hydrocarbons
Assignee: Shell USA Inc
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Filing: 1969-05-01
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Granted: 1971-07-27
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Expires: 1989-05-01
Abstract
Abstract A PROCESS FOR STABILIZING DIOLEFINS IN CRACKED HYDROCARBON OILS BY REACTION WITH HYDROGEN SULFIDE IN THE PRESENCE OF HYDROGEN TO PREVENT OR REDUCE POLYMERIZATION AND GUM FORMATION ON SUBSEQUENT HEATING. IN ONE EMBODIMENT THE PROCESS IS USED IN CONNECTION WITH CONVENTIONAL HYDROGENATION/HYDROSULFURIZATION TO STABILIZE DIOLEFIN-CONTAINING CRACKED OILS BY CONVERSION, AT LEAST IN PART, OF DIOLEFINS TO ORGANIC SULFUR COMPOUNDS FOLLOWED BY SUBSEQUENT HYDROGENATION AND DESULFURIZATION. D R A W I N G
Inventors
- 👤 Charles T Adams
- 👤 Richard E Fruit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:02
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; C10G65/06; C10G29/00; C10G29/04; C10G29/20; C10G29/28; C10G45/00; C10G45/32
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 |