Patent US2460019A successfully refreshed from Google Patents.
US2460019A
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US
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Method and apparatus for countercurrent contacting of liquids
Assignee: Standard Oil Development Co
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Filing: 1944-08-23
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Granted: 1949-01-25
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Expires: 1964-08-23
Abstract
No abstract record available.
Inventors
- 👤 John D Long
- 👤 Jr Cyril O Rhys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:55
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1320396A
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US1170658A
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GB156490A
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US1621728A
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US1782735A
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US2009510A
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US2153507A
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US2144797A
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US2274030A
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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) | 1952-01-25 | 1952-07-26 | 1953-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-25 | 1956-07-26 | 1957-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-25 | 1960-07-26 | 1961-01-25 | $7700.00 | Window Closed / Lapsed |