US3088985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New open-chain trimer and the production thereof
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1958-08-28
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Granted: 1963-05-07
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Expires: 1978-08-28
Abstract
No abstract record available.
Inventors
- 👤 Wilke Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:14
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/21; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2/40; C07C2/403; C07C2/406; C07C2527/00; C07C2527/06; C07C2527/132; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/26; C07C2531/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
PROCESS FOR THE TRIMERIZATION OF 2,3-DIMETHYL-BUTADI1,3-ENE TO FORM AN OPEN-CHAIN TRIMER, WHICH COMPRISES CONTACTING 2,3-DIMETHYL-BUTADI-1,3-ENE UNDER POLYMERIZATION CONDITIONS INCLUDING A TEMPERATURE OF FROM 0 TO 100* C. WITH A CATALYST COMPRISING A MIXTURE OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF CHLORIDES AND OXYCHLORIDES OF CHROMIUM WITH AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, DIALKYL ALUMINUM HYDRIDES AND ALKYL ALUMINUM CHLORIDES, THE MOLAR RATIO OF CHROMIUM ALUMINUM IN SAID CATALYST MIXTURE BEING FROM 1:3 TO 5, AND RECOVERING THE OPEN-CHAIN TRIMER, OF 2,3-DIMETHYL-BUTADI-1,3-ENE.
Claim 2
Dependent Claim
91 words
PROCESS FOR THE TRIMERIZATION OF 2,3-DIMETHYL-BUTADI1,3-ENE TO FORM AN OPEN-CHAIN TRIMER, WHICH COMPRISES CONTACTING 2,3-DIMETHYL-BUTADI-1,3-ENE UNDER POLYMERIZATION CONDITIONS INCLUDING A TEMPERATURE OF FROM 0 TO 100* C. WITH A CATALYST COMPRISING A MIXTURE OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF CHLORIDES AND OXYCHLORIDES OF CHROMIUM WITH AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, DIALKYL ALUMINUM HYDRIDES AND ALKYL ALUMINUM CHLORIDES, THE MOLAR RATIO OF CHROMIUM ALUMINUM IN SAID CATALYST MIXTURE BEING FROM 1:3 TO 5, AND RECOVERING THE OPEN-CHAIN TRIMER, OF 2,3-DIMETHYL-BUTADI-1,3-ENE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |