Patent US2423833A successfully refreshed from Google Patents.
US2423833A
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US
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Fluid catalytic conversion of hydrocarbon oils
Assignee: Foster Wheeler Inc
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Filing: 1944-08-19
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Granted: 1947-07-15
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Expires: 1964-08-19
Abstract
No abstract record available.
Inventors
- 👤 Joel H Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:34
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2351793A
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US2253486A
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US2343852A
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US2335717A
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US2348576A
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US2353399A
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US2349574A
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US2353505A
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US2355831A
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US2340974A
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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) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |