US4424127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Column for liquid and gas chromatography
Assignee: Individual
•
Filing: 1980-03-06
•
Granted: 1984-01-03
•
Expires: 2000-03-06
Abstract
Abstract Column for carrying out gas or liquid chromatography comprising several capillaries coupled in parallel the capillaries being arranged side by side or woven or pleated together in the form of a flat band-like device, whereby the column can be bent and rolled up without tensions arising in same.
Inventors
- 👤 Johan Roeraade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6052; G01N30/6065; G01N30/6034; G01N30/6043; G01N30/6047
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
74 words
A gas or liquid chromatography column comprising a plurality of capillary tubes coupled in parallel, the capillary tubes being arranged in the form of a flat band-like device, allowing the column to be bent and rolled up without tensions arising in same, the capillary tubes being adapted at a first end of the column to receive a supply of carrier fluid and at a second end of the column for discharge of separated products.
Claim 2
Dependent Claim
74 words
A gas or liquid chromatography column comprising a plurality of capillary tubes coupled in parallel, the capillary tubes being arranged in the form of a flat band-like device, allowing the column to be bent and rolled up without tensions arising in same, the capillary tubes being adapted at a first end of the column to receive a supply of carrier fluid and at a second end of the column for discharge of separated products.
Claim 3
Dependent Claim
14 words
The column of claim 1, wherein the capillary tubes are laterally held together mechanically.
Claim 4
Dependent Claim
19 words
The column of claim 2, wherein the capillary tubes are held together by baking same into a binding material.
Claim 5
Dependent Claim
13 words
The column of claim 3, wherein the binding material is a thermosetting resin.
Claim 6
Dependent Claim
21 words
The column of claim 2, wherein the capillary tubes are held together by being glued side by side onto a support.
Claim 7
Dependent Claim
12 words
The column of claim 5 wherein the support is a plastic foil.
Claim 8
Dependent Claim
16 words
The column of claim 2, wherein the capillary tubes are held together by laterally extending threads.
Claim 9
Dependent Claim
21 words
The column of claim 2, wherein the capillary tubes are held together by weaving or pleating the individual capillary tubes together.
Claim 10
Dependent Claim
35 words
The column of claim 1, wherein the capillary tubes at least at one end of the column, are left free over part of their lengths to enable trimming and to facilitate manifolding the capillary tubes.
Claim 11
Dependent Claim
13 words
The column of claim 1, wherein the capillary tubes are made of silica.
Claim 12
Dependent Claim
21 words
The column of claim 10, wherein the capillary tubes are coated on their exterior with a thin polymer or metal layer.
Claim 13
Dependent Claim
13 words
The column of claim 1, wherein the capillary tubes are made from steel.
Claim 14
Dependent Claim
19 words
The column of claim 1, wherein a plurality of flat band-like devices are positioned on top of each other.
Claim 15
Dependent Claim
14 words
The column of claim 1, wherein the capillary tubes are arranged side by side.
References Cited (Backward Citations)
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US3442002A
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US3570673A
Cited
SE374210B
Cited
SE375156B
Cited
US4031012A
Cited
DE2821105A1
Cited
US4293415A
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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) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |