US3390963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countercurrent mass transfer between two phases at least one of which is a fluid
Assignee: IFP Energies nouvelles
•
Filing: 1963-08-07
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Granted: 1968-07-02
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Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Wiegandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:45
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0269; B01D11/04; B01D11/0476; B01D11/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A COUNTERCURRENT CONTACT PROCESS BETWEEN TWO PHASES OF WHICH AT LEAST ONE IS A LIQUID AND THE OTHER IS SELECTED FROM THE GROUP CONSISTING OF SOLID AND LIQUID, WHICH PROCESS COMPRISES PASSING SAID KTWO PHASES IN COUNTERCOURRNET CONTACT THROUGH A CONTINUOUS HELICOIDAL ZONE HAVING ITS LONGITUDINAL AXIS INCLINED TO THE HORIZONTAL AND WITH PASSAGE FROM ONE HELICOIDAL TURN TO THE NEXT BEING POSSIBLE ONLY THROUGH THE HELICOIDAL PATH, AND ROTATING THE HELICOIDAL ZONE ABOUT SAID LONGITUNINAL AXIS.
Claim 2
Dependent Claim
77 words
A COUNTERCURRENT CONTACT PROCESS BETWEEN TWO PHASES OF WHICH AT LEAST ONE IS A LIQUID AND THE OTHER IS SELECTED FROM THE GROUP CONSISTING OF SOLID AND LIQUID, WHICH PROCESS COMPRISES PASSING SAID KTWO PHASES IN COUNTERCOURRNET CONTACT THROUGH A CONTINUOUS HELICOIDAL ZONE HAVING ITS LONGITUDINAL AXIS INCLINED TO THE HORIZONTAL AND WITH PASSAGE FROM ONE HELICOIDAL TURN TO THE NEXT BEING POSSIBLE ONLY THROUGH THE HELICOIDAL PATH, AND ROTATING THE HELICOIDAL ZONE ABOUT SAID LONGITUNINAL AXIS.
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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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |