Patent US2686208A successfully refreshed from Google Patents.
US2686208A
Expired / Lapsed
US
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Production of cyclo-olefinic compounds
Assignee: Imperial Chemical Industries Ltd
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Filing: 1951-08-30
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Granted: 1954-08-10
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Expires: 1971-08-30
Abstract
No abstract record available.
Inventors
- 👤 Reed Hugh Wilma Boulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:25
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/16; C07C2531/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF CYCLOOLEFINIC COMPOUND CONTAINING AT LEAST EIGHT CARBON ATOMS IN THE RING, WHICH COMPRISES THE STEP OF CONTACTING OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CONJUGATED OPEN CHAIN DIOLEFINIC HYDROCARBONS AND ALKOXY SUBSTITUTED DERIVATIVES THEREOF IN THE PRESENCE OF ACETYLENE AT ELEVATED PRESSURE NOT EXCEEDING 15 ATMOSPHERES AT A TEMPERATURE OF FROM 80* TO 150* C. WITH A NICKEL CARBONYL CATALYST BEARING IN LIEU OF AT LEAST ONE OF ITS CO GROUPS A COMPOUND OF A TRIVALENT ELEMENT SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND PHOSPHORUS.
Claim 2
Dependent Claim
95 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF CYCLOOLEFINIC COMPOUND CONTAINING AT LEAST EIGHT CARBON ATOMS IN THE RING, WHICH COMPRISES THE STEP OF CONTACTING OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CONJUGATED OPEN CHAIN DIOLEFINIC HYDROCARBONS AND ALKOXY SUBSTITUTED DERIVATIVES THEREOF IN THE PRESENCE OF ACETYLENE AT ELEVATED PRESSURE NOT EXCEEDING 15 ATMOSPHERES AT A TEMPERATURE OF FROM 80* TO 150* C. WITH A NICKEL CARBONYL CATALYST BEARING IN LIEU OF AT LEAST ONE OF ITS CO GROUPS A COMPOUND OF A TRIVALENT ELEMENT SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND PHOSPHORUS.
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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |