US2979543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of cyclododecatri(1, 5, 9)-enes concurrently with other cyclic hydrocarbons
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1958-01-22
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Granted: 1961-04-11
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Expires: 1978-01-22
Abstract
No abstract record available.
Inventors
- 👤 Wilke Gunther
- 👤 Muller Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2527/00; C07C2527/06; C07C2527/132; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2601/00; C07C2601/18; C07C2601/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 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 CHROMIUM HALIDE AND AN ORGANO-ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, ALUMINUM ALKYL HYDRIDES AND ALUMINUM DIALKYL MONOHALIDES TO THEREBY PRODUCE CYCLODODECATRI-(1,5,9)-ENE WITH OTHER CYCLOHYDROCARBONS HAVING AT LEAST 8 CARBON ATOMS AND AT LEAST TWO DOUBLE BONDS IN THE RING.
Claim 2
Dependent Claim
70 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 CHROMIUM HALIDE AND AN ORGANO-ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, ALUMINUM ALKYL HYDRIDES AND ALUMINUM DIALKYL MONOHALIDES TO THEREBY PRODUCE CYCLODODECATRI-(1,5,9)-ENE WITH OTHER CYCLOHYDROCARBONS HAVING AT LEAST 8 CARBON ATOMS AND AT LEAST TWO DOUBLE BONDS IN THE RING.
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |