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Patent US2494588A successfully refreshed from Google Patents.
US2494588A
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Extruder reactor
Assignee: Standard Oil Development Co
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Filing: 1943-12-01
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Granted: 1950-01-17
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Expires: 1963-12-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Skooglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:44
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1320718A
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US701957A
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US786125A
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US1156096A
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US1614526A
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US2063266A
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US2131905A
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US2078565A
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US2209746A
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US2435228A
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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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |