US3408418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing diolefins containing six carbon atoms by the reaction of ethylene with 1, 3 butadiene in the presence of a catalyst system of ferric chloride, a tertiary phosphine, and a trialkylaluminum
Assignee: Toray Industries Inc
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Filing: 1965-09-07
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Granted: 1968-10-29
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Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 Iwamoto Masao
- 👤 Yuguchi Sadao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:02
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2527/00; C07C2527/06; C07C2527/128; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/24; C07C2531/26; C07C2531/28; C07C2531/30
Claims Analysis
Total Claims: 0
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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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |