Patent US3055646A successfully refreshed from Google Patents.
US3055646A
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US
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Vapor-liquid contacting apparatus
Assignee: Gulf Oil Corp
•
Filing: 1959-04-08
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Granted: 1962-09-25
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Expires: 1979-04-08
Abstract
No abstract record available.
Inventors
- 👤 Aksel C Eld
- 👤 William R Lehrian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:50
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/163; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1057576A
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US1453735A
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US2061830A
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US2206356A
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US2428889A
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US2627397A
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US2658737A
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US2650793A
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US2772080A
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US2951691A
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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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |