US4162977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for removably securing separation column within column chromatography apparatus
Assignee: Prolabo SA
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Filing: 1978-02-28
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Granted: 1979-07-31
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Expires: 1998-02-28
Abstract
Abstract A separation column is removably affixed within a column chromatography apparatus by means of a column engaging member, e.g., a concentric tube, and by securing a dispensing head of the apparatus to such member and engaged column via substantially axial compressive strength applied through said column engaging member.
Inventors
- 👤 Claude Guillemin
- 👤 Christian Mayen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6047; G01N30/6034
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
185 words
In chromatography apparatus including a dispensing head, a device for removably securing chromatography separation column means in operative relationship to said dispensing head, said device including: a generally tubular engagement column adapted to receive and carry said separation column means, and including means at one end thereof defining a first bearing surface arranged to be engageable with one axial end of separation column means carried thereby; means for removably connecting the other end of said engagement column with said dispensing head, said dispensing head having a second bearing surface thereon arranged to confront the other axial end of separation column means carried by said engagement column when said engagement column is connected with said dispensing head; and adjustable means for applying a selected, substantially axial compressive stress to separation column means carried by said engagement column when the other end of said engagement column is connected with said dispensing head, said stress being applied through said engagement column and said first and said second bearing surfaces, whereby to secure said separation column means carried by said engagement column in operative relationship with said dispensing head.
Claim 2
Dependent Claim
185 words
In chromatography apparatus including a dispensing head, a device for removably securing chromatography separation column means in operative relationship to said dispensing head, said device including: a generally tubular engagement column adapted to receive and carry said separation column means, and including means at one end thereof defining a first bearing surface arranged to be engageable with one axial end of separation column means carried thereby; means for removably connecting the other end of said engagement column with said dispensing head, said dispensing head having a second bearing surface thereon arranged to confront the other axial end of separation column means carried by said engagement column when said engagement column is connected with said dispensing head; and adjustable means for applying a selected, substantially axial compressive stress to separation column means carried by said engagement column when the other end of said engagement column is connected with said dispensing head, said stress being applied through said engagement column and said first and said second bearing surfaces, whereby to secure said separation column means carried by said engagement column in operative relationship with said dispensing head.
Claim 3
Dependent Claim
30 words
In chromatography apparatus as recited in claim 1, wherein said connecting means comprises interengageable thread means carried by said other end of said engagement column and by said dispensing head.
Claim 4
Dependent Claim
37 words
In chromatography apparatus as recited in claim 2, wherein said adjustable means for applying a selected substantial axial compressive stress to separation column means carried by said engagement column comprises thread means engageable with said engagement column.
Claim 5
Dependent Claim
35 words
In chromatography apparatus as recited in claim 3, wherein said thread means for applying a selected substantial axial compressive stress is combined with said thread means for connecting said engagement column with said dispensing head.
Claim 6
Dependent Claim
24 words
In chromatography apparatus as recited in claim 1, wherein said first bearing surface is formed by an integral end wall of said engagement column.
Claim 7
Dependent Claim
29 words
In chromatography apparatus as recited in claim 1, wherein said generally tubular engagement columm has an internal diameter only slightly larger than separation column means to be received therein.
Claim 8
Dependent Claim
32 words
In chromatography apparatus as recited in claim 1, further including: seal means located between said second bearing surface and the other axial end of separation column means received in said engagement column.
Claim 9
Dependent Claim
25 words
In chromatography apparatus as recited in claim 1, wherein said engagement column is provided with viewing openings therein, for viewing separation column means received therein.
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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |