US2833840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for contacting immiscible liquids
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-06-21
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Granted: 1958-05-06
•
Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 John P Longwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:38
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0446; B01D11/0453; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AN IMPROVED PROCESS FOR CONTACTING A RELATIVELY LIGHT LIQUID WITH A LESSER QUANTITY OF A RELATIVELY DENSE LIQUID IMMISCIBLE THEREWITH WHICH COMPRISES INTRODUCING SAID LIQUIDS INTO ONE END OF AN ELONGATED CYLINDRICAL VESSEL, IMPARTING HELICAL FLOW TO THE LIQUID ALONG THE INNER WALL OF SAID VESSEL, FORMING A SLOW MOVING OF THE HEAVIER
Claim 2
Dependent Claim
53 words
AN IMPROVED PROCESS FOR CONTACTING A RELATIVELY LIGHT LIQUID WITH A LESSER QUANTITY OF A RELATIVELY DENSE LIQUID IMMISCIBLE THEREWITH WHICH COMPRISES INTRODUCING SAID LIQUIDS INTO ONE END OF AN ELONGATED CYLINDRICAL VESSEL, IMPARTING HELICAL FLOW TO THE LIQUID ALONG THE INNER WALL OF SAID VESSEL, FORMING A SLOW MOVING OF THE HEAVIER
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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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |