Patent US3770592A successfully refreshed from Google Patents.
US3770592A
Expired / Lapsed
US
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Distillation column
Assignee: Societe des Verreries Industrielles Reunies du Loing
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Filing: 1971-04-27
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Granted: 1973-11-06
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Expires: 1991-04-27
Abstract
Abstract In a cylindrical distillation column a central shaft is provided and a helical ribbon of flexible material is wound about the shaft and secured thereto to define a ramp having the desired pitch. The wound shaft is then inserted in the cylindrical column in fluid tight engagement therewith to provide a helical path for contact between the liquid phase and the vapor phase.
Inventors
- 👤 M Noirot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:53
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; Y; Y10; Y10S; Y10S159/00; Y10S159/15
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A distillation column comprising a hollow cylindrical column, a shaft non-rotatably, removably and concentrically disposed in said column, a thin, removable & replacable helicoidal resilient packing strip wrapped about said shaft in fluid tight engagement with said shaft and said column and means for detachably securing said packing strip to said shaft at opposite ends thereof whereby said packing strip may be disposed in contact with said shaft and said cylindrical column and the packing strip is selected so that its pitch is suited to the material being distilled and its diameters to engage said shaft and column.
Claim 2
Dependent Claim
98 words
A distillation column comprising a hollow cylindrical column, a shaft non-rotatably, removably and concentrically disposed in said column, a thin, removable & replacable helicoidal resilient packing strip wrapped about said shaft in fluid tight engagement with said shaft and said column and means for detachably securing said packing strip to said shaft at opposite ends thereof whereby said packing strip may be disposed in contact with said shaft and said cylindrical column and the packing strip is selected so that its pitch is suited to the material being distilled and its diameters to engage said shaft and column.
Claim 3
Dependent Claim
76 words
A distillation column as set forth in claim 1 wherein said means for securing said packing strip is comprised of a slot in one end of said shaft along the axis thereof for securing one end of said packing strip, clip means for securing the other end of said packing strip to the other end of said shaft, said other end of said packing strip being provided with ring means for cooperating with said clip means.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |