US3629347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloco-oligomerization to form multicyclic olefinic rings
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1969-07-29
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Granted: 1971-12-21
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Expires: 1989-07-29
Abstract
Abstract PROCESS OF CYCLOCO-OLIGOMERIZATION OF A CONJUGATED DIOLEFIN, SUCH AS BUTADIENE OR A SUBSTITUTED BUTADIENE, WITH A DIFFERENT CYCLIC UNSATURATED HYDROCARBON, WHICH IS AN ACETYLENE AND/OR A NON-CONJUGATED OLEFIN, PREFERABLY A MONOOLEFIN, TO PRODUCE MULTICYCLIC PRODUCTS HAVING OLEFINIC UNSATURATION IN AT LEAST ONE OF THE RINGS. THESE PRODUCTS ARE MADE BY REACTING THE ABOVE-MENTIONED REACTANTS TOGETHER IN CONTACT WITH A CARBONYL-FREE, O-VALENT NICKEL COMPOUND CATALYST. MANY OF THE NEW PRODUCTS FORMED BY THIS PROCESS ARE DESCRIBED, CHARACTERIZED AND CLAIMED.
Inventors
- 👤 Gunther Wilke
- 👤 Paul Heimbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:28
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/54; C07C13/605; C07C13/02; C07C13/16; C07C13/20; C07C13/26; C07C13/263; C07C13/271; C07C13/273; C07C13/275; C07C13/277; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16; C07C2601/18; C07C2601/20; C07C2603/00; C07C2603/56; C07C2603/58; C07C2603/76; C07C2603/84
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |