US2454149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of normal butane
Assignee: Gulf Oil Corp
•
Filing: 1945-10-31
•
Granted: 1948-11-16
•
Expires: 1965-10-31
Abstract
No abstract record available.
Inventors
- 👤 Leslie U Franklin
- 👤 Charles F Plumhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:32
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786; C07C5/2789
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2417201A
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US2409260A
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US2378734A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |