US2409259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of conjugated dienes
Assignee: Union Oil Company of California
•
Filing: 1942-07-13
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Granted: 1946-10-15
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Expires: 1962-07-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Doumani
- 👤 Deering Roland Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:07
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/02; C07C13/08; C07C13/15; C07C11/00; C07C11/12; C07C11/16; C07C11/167; C07C11/173; C07C11/18; C07C4/00; C07C4/22; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C2601/00; C07C2601/06; C07C2601/10; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-10-14 | 1950-04-15 | 1950-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-14 | 1954-04-15 | 1954-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-14 | 1958-04-15 | 1958-10-15 | $7700.00 | Window Closed / Lapsed |