US3420904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for oligomerizing a conjugated aliphatic diolefin and ethylene
Assignee: Columbian Carbon Co
•
Filing: 1966-05-23
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Granted: 1969-01-07
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Expires: 1986-05-23
Abstract
No abstract record available.
Inventors
- 👤 Langley R Hellwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/50; C07C2/52; C07C2/04; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3004081A
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US3271468A
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US3187062A
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US3249641A
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US3272876A
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US3326990A
Cited
US3277099A
Cited
US3270071A
Cited
US3379706A
Cited
US3349138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |