Patent US2960322A successfully refreshed from Google Patents.
US2960322A
Expired / Lapsed
US
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Apparatus for countercurrent contacting of liquid and vapor streams
Assignee: Gulf Oil Corp
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Filing: 1957-04-03
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Granted: 1960-11-15
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Expires: 1977-04-03
Abstract
No abstract record available.
Inventors
- 👤 Aksel C Eld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:11
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2084768A
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US2222565A
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US2428889A
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US2438536A
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US2564078A
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US2602652A
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US2658737A
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US2658738A
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US2710177A
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GB751215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |