US4133562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation column
Assignee: Cytiva Sweden AB
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Filing: 1977-04-05
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Granted: 1979-01-09
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Expires: 1997-04-05
Abstract
Abstract A separation column comprising a column tube and terminal flanges, wherein the terminal flanges are attached to the column tube by means of a two-layer material which encloses a portion of the column tube and a portion of one of said terminal flanges, said two-layer material comprising a fusible plastic layer in contact with the column tube and said terminal flange and an outer hose of shrinking plastic, having been subjected to a heat treatment causing the fusible plastic layer to fuse and the shrinking plastic hose to shrink.
Inventors
- 👤 Lars-Goran H. Andren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:14
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/6021; B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/22; G01N30/26; G01N30/28; G01N30/30; G01N30/6026
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A separation column comprising a column tube and terminal flanges, said terminal flanges being sealed relative to the column tube by means of a two-layer material which encloses a portion of the column tube and a portion of one of said terminal flanges, said two-layer material comprising an inner fusible plastic tubular layer in contact with the column tube and said terminal flange and a concentric outer tubular layer of shrinking plastic, having been subjected to a heat treatment causing the fusible plastic layer to fuse and adhere to said terminal flange and column tube, and the shrinking plastic hose to shrink and exert a radially directed force against said fusible layer.
Claim 2
Dependent Claim
112 words
A separation column comprising a column tube and terminal flanges, said terminal flanges being sealed relative to the column tube by means of a two-layer material which encloses a portion of the column tube and a portion of one of said terminal flanges, said two-layer material comprising an inner fusible plastic tubular layer in contact with the column tube and said terminal flange and a concentric outer tubular layer of shrinking plastic, having been subjected to a heat treatment causing the fusible plastic layer to fuse and adhere to said terminal flange and column tube, and the shrinking plastic hose to shrink and exert a radially directed force against said fusible layer.
Claim 3
Dependent Claim
41 words
The apparatus of claim 1 wherein said separation column includes a mantle tube, and said column tube is positioned internal of and concentric with said mantle tube and is spaced therefrom and sealed with respect thereto by means of said flanges.
Claim 4
Dependent Claim
35 words
The apparatus of claim 2 wherein the surface of said one terminal flange in contact with said inner fusible plastic tubular layer includes a beaded portion about which said fusible plastic is fused and adhered.
Claim 5
Dependent Claim
41 words
The apparatus of claim 3 wherein said terminal flanges comprise a terminal sleeve positioned internal of and concentric with said mantle tube and in sealing engagement therewith, and said one terminal flange extends into said terminal sleeve in sealing engagement therewith.
Claim 6
Dependent Claim
37 words
The apparatus of claim 4 wherein said separation column includes an upper terminal piece attached to said terminal sleeve and having an axially extending bore, and a flow adapter extending through said bore into said column tube.
Claim 7
Dependent Claim
30 words
The apparatus of claim 5 wherein said terminal piece includes a radially extending threaded bore through which a mounting screw having a control knob extends for controlling said flow adapter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |