US2425532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing inorganic impurities from mineral oils preparatory to catalyticcracking
Assignee: Standard Oil Development Co
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Filing: 1944-05-26
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Granted: 1947-08-12
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Expires: 1964-05-26
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hemminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1965168A
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US1982462A
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US2268094A
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US2247126A
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US2328325A
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US2273075A
Cited
US2312681A
Cited
US2327175A
Cited
US2366792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |