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US2772780A
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Apparatus for contacting liquids with granular solid materials
Assignee: ExxonMobil Oil Corp
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Filing: 1951-07-17
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Granted: 1956-12-04
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Expires: 1971-07-17
Abstract
No abstract record available.
Inventors
- 👤 Joe E Penick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; C; C10; C10G; C10G25/00; C10G25/06; C10G25/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US401057A
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US473011A
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US523585A
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US1566058A
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US1703451A
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US2412135A
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US2629632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |