US2964574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New cyclododecatri-(1, 5, 9)-enes and a process for the production thereof concurrently with other cyclic hydrocarbons
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1957-02-20
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Granted: 1960-12-13
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Expires: 1977-02-20
Abstract
No abstract record available.
Inventors
- 👤 Wilke Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:32
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/02; C07C13/273; C07C13/275; C07C13/277; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2527/00; C07C2527/06; C07C2527/135; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/26; C07C2531/38; C07C2601/00; C07C2601/18; C07C2601/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
PROCESS FOR THE PRODUCTION OF CYCLODODECATRI(1,5,9)-ENES WHICH COMPRISES CONTACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE, AND PIPERYLENE, WITH A CATALYST COMPRISING A TITANIUM HALIDE AND ALKYL ALUMINUM HALIDE TO THEREBY FORM CYCLODODECATRI-(1,5,9)-ENES WITH OTHER CYCLIC HYDROCARBONS CONTAINING AT LEAST 8 CARBON ATOMS AND AT LEAST TWO DOUBLE BONDS IN THE RING.
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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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |