Patent US3331644A successfully refreshed from Google Patents.
Patent US3689401A successfully refreshed from Google Patents.
US3689401A
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US
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Process for treating by-product heavy fractions formed in the production of olefins
Assignee: Kureha Corp
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Filing: 1970-12-11
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Granted: 1972-09-05
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Expires: 1990-12-11
Abstract
Abstract TREATED WITH ORGANIC SULFUR COMPOUNDS, TO THEREBY IMPART THERMAL STABILITY TO THE OIL, THEN SUBJECTING THE RESULTING OIL TO A HYDROREFINING FOLLOWED BY REACTION WITH AN OLEFIN AND/OR A HYDROGENATION IS DISCLOSED. A PROCESS FOR OBTAINING IMPROVED HYDROCARBON OIL PRODUCTS BY TREATING BY-PRODUCT HEAVY FRACTIONS, FORMED IN THE PRODUCTION OF OLEFINS AND HAVING INITIAL BOILING POINT OF ABOVE 160*C. AND A 75% DISTIL-OFF POINT OF BELOW 450*C., WITH HYDROGEN AT TEMPERATURE OF FROM 40 TO 200*C. AND A PRESSURE OF FROM 5 TO 300 KG./CM.2 G USING A NICKEL-CONTAINING CATALYST WHICH HAS BEEN PRE-
Inventors
- 👤 Shinpei Gomi
- 👤 Masaaki Takahashi
- 👤 Tadashi Ishiguro
- 👤 Akio Okagami
- 👤 Kunihiko Uemoto
- 👤 Hiroshi Kuribayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:47
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; C10G65/08; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08; C10G45/32; C10G45/34; C10G45/36; C10G67/00; C10G67/02; C10G67/06; C10G69/00; C10G69/02; C10G69/06; C10G69/12; C10G69/123
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |