Patent US2461545A successfully refreshed from Google Patents.
US2461545A
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Isomerization process
Assignee: Phillips Petroleum Co
•
Filing: 1944-08-07
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Granted: 1949-02-15
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Expires: 1964-08-07
Abstract
No abstract record available.
Inventors
- 👤 Harold J Hepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:53
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786
Claims Analysis
Total Claims: 0
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US2357495A
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US2315078A
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US2408752A
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US2402807A
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US2355198A
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US2394797A
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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) | 1952-02-15 | 1952-08-16 | 1953-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-15 | 1956-08-16 | 1957-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-15 | 1960-08-16 | 1961-02-15 | $7700.00 | Window Closed / Lapsed |