US3662015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing double bond migration of mono-olefinic hydrocarbons in selective hydrogenation
Assignee: Cosmo Oil Co Ltd
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Filing: 1969-05-27
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Granted: 1972-05-09
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Expires: 1989-05-27
Abstract
Abstract METHOD OF PREVENTING DOUBLE BOND MIGRATION OF A MONOOLEFINIC HYDROCARBON DURING THE SELECTIVE HYDROGENATION OF A POLY-UNSATURAED HYDROCARBON (E.G. POLYOLEFINIC HYDROCARBON, ACETYLENIC HYDROCARBON) COEXISTING WITH A MONOOLEFINIC HYDROCARBON, EACH OF THE MONO-OLEFINIC HYDROCARBONS AND POLY-UNSATURATED HYDROCARBONS HAVING AT LEAST FOUR CARBON ATOMS, IN THE PRESENCE OF HYDROGEN, USING A PALLADIUM- OR NICKEL-HYDROGENATION CATALYST, WHICH COMPRISES ADDING CARBON MONOXIDE TO THE REACTION SYSTEM IN AN AMOUNT 1 TO 50 MOL. PERCENT BASED ON SAID HYDROGEN UNDER SELECTIVELY HYDROGENATION CONDITIONS.
Inventors
- 👤 Youji Komatsu
- 👤 Yasuhiro Furukawa
- 👤 Takashi Yokomizo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:15
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/08; C07C5/03; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/70; C07C2523/74; C07C2523/755
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |