US3770839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing cyclododecatriene-1,5,9
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1970-06-29
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Granted: 1973-11-06
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Expires: 1990-06-29
Abstract
Abstract CYCLODODECATRIENE-1,5,9 IS PREPARED BY CATALYZING THE TRIMERIZATION OF BUTADIENE-1,3 WITH THE REACTION PRODUCT OF AN ORGANIC TITANATE, PHOSPHORIC ACID, AND ALUMINUM ALKYL HALIDE THAT HAS A TI-O-P LINKAGE.
Inventors
- 👤 S Matsushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:24
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0255; B01J31/0257; B01J31/0258; B01J31/0201; B01J31/0211; B01J31/0212; B01J31/12; B01J31/14; B01J31/143; B01J31/26; C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/324; B01J2231/328; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2601/00; C07C2601/18; C07C2601/20
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |