US2468432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimerization of butadiene
Assignee: Sunoco Inc
•
Filing: 1946-02-12
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Granted: 1949-04-26
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Expires: 1966-02-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; B; B01; B01J; B01J27/00; B01J27/20; B01J27/22; C07C2/50; C07C2/52; C07C2527/00; C07C2527/20; C07C2527/22; C07C2527/224
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) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |