US2426706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segregation of olefinic hydrocarbons by extractive distillation
Assignee: Standard Oil Development Co
•
Filing: 1943-10-26
•
Granted: 1947-09-02
•
Expires: 1963-10-26
Abstract
No abstract record available.
Inventors
- 👤 John A Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1948777A
Cited
US2186524A
Cited
US2113965A
Cited
US2288126A
Cited
US2302608A
Cited
US2290636A
Cited
US2316126A
Cited
US2371342A
Cited
US2372941A
Cited
US2380019A
Cited
US2408922A
Cited
US2325379A
Cited
US2377049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |