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US2440482A
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Process and apparatus for contacting fluids with powdered solids
Assignee: Standard Oil Development Co
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Filing: 1943-12-15
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Granted: 1948-04-27
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Expires: 1963-12-15
Abstract
No abstract record available.
Inventors
- 👤 Homer Z Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:10
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2340878A
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US2304827A
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US2349574A
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US2349575A
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US2310377A
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US2337684A
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US2327175A
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US2358888A
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US2353731A
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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) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |