US2471647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of olefins in the presence of hydrogen fluoride impregnated alumina
Assignee: ExxonMobil Oil Corp
•
Filing: 1946-03-04
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Granted: 1949-05-31
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Expires: 1966-03-04
Abstract
No abstract record available.
Inventors
- 👤 Alex G Oblad
- 👤 Joseph U Messenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2525; C07C5/2543; B; B01; B01J; B01J27/00; B01J27/06; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2194186A
Cited
GB534151A
Cited
US2353552A
Cited
US2388510A
Cited
US2406869A
Cited
US2397085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |