US4238426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal-whirling contact tray
Assignee: Individual
•
Filing: 1979-07-30
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Granted: 1980-12-09
•
Expires: 1999-07-30
Abstract
Abstract The present invention relates to equipment designed for carrying out heat- and mass transfer processes between gas or vapor and liquid and deals with centrifugal-whirling contact trays installed in rectification, absorption, washing and contact vertical columns in which liquid moves in a downward direction and contacts gas or vapor rising upwards along the column, the liquid phase containing the solid phase or polymerization products.
Inventors
- 👤 Ivan P. Slobodyanik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:40
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; B01D3/22; B01D47/00; B01D47/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR613550A
Cited
GB682721A
Cited
AT174048B
Cited
BE518215A
Cited
US3338566A
Cited
US3364988A
Cited
US3784175A
Cited
US4036917A
Cited
US4065528A
Cited
US4151232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |