US2389250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization
Assignee: ExxonMobil Oil Corp
•
Filing: 1941-10-01
•
Granted: 1945-11-20
•
Expires: 1961-10-01
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Francis
- 👤 William H James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/271; C07C5/2718; C07C5/2721; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786; C07C5/2789
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) | 1948-11-19 | 1949-05-21 | 1949-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-11-19 | 1953-05-21 | 1953-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-11-19 | 1957-05-21 | 1957-11-20 | $7700.00 | Window Closed / Lapsed |