US4549584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for filling chromatography columns
Assignee: Prochrom
•
Filing: 1983-10-05
•
Granted: 1985-10-29
•
Expires: 2003-10-05
Abstract
Abstract A process and apparatus for filling and packing a chromatographic column by the wet route in which a compression chamber is attached to one end of the column having an internal bore equal to the internal diameter of the column and aligned therewith to form a combined chamber, a fluid suspension of packing particles is introduced into the combined chamber and then a piston member is axially displaced within the compression chamber toward the chromatographic column to compact the packing particles in the column. The suspension liquid flows out of the column through a conduit formed through the piston and/or through the cap at the other end of the column. After compression, the compression chamber and piston are separated from the column and the packed column may then be attached to a chromatograph for use. Vibrators may be provided on the column or compression chamber to promote transverse rearrangement of the particles during compression. The liquid suspension of packing particles may be introduced into the combined chamber via a channel through the piston, or through the compression chamber after removing the piston, or through the opposite end of the chromatographic column. A porous plate may be placed over the conduit to prevent packing particles from exiting the combined chamber with the suspension liquid.
Inventors
- 👤 Daniel Morin
- 👤 Roland Prechner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:13
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/20; B01D15/206; G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/56; G01N30/52; G01N2030/522; G01N2030/562; G01N2030/565
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
134 words
Apparatus for filling and packing a chromatographic column having a defined bore, said apparatus comprising: a compression chamber having the same bore as said chromatographic column, said compression chamber being selectively attachable at and detachable from one end of said chromatographic column such that the interior of said compression chamber is aligned with the interior of said chromatogragraphic column to form a combined chamber; a piston sealingly fitting in said compression chamber; means for selectively moving said piston in said compression chamber toward and away from said chromatographic column; means for closing the other end of said chromatographic column; and a conduit extending through at least one of said piston and said other end closing means through which a suspending liquid for packing particles for said chromatographic column may exit from said combined chamber
Claim 2
Dependent Claim
134 words
Apparatus for filling and packing a chromatographic column having a defined bore, said apparatus comprising: a compression chamber having the same bore as said chromatographic column, said compression chamber being selectively attachable at and detachable from one end of said chromatographic column such that the interior of said compression chamber is aligned with the interior of said chromatogragraphic column to form a combined chamber; a piston sealingly fitting in said compression chamber; means for selectively moving said piston in said compression chamber toward and away from said chromatographic column; means for closing the other end of said chromatographic column; and a conduit extending through at least one of said piston and said other end closing means through which a suspending liquid for packing particles for said chromatographic column may exit from said combined chamber
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1, further comprising a porous member interposed across said conduit for preventing packing particles from exiting said combined chamber with said suspending liquid through said conduit.
Claim 4
Dependent Claim
54 words
Apparatus according to claim 1, wherein a junction element having the same bore as said chromatographic column and said compression chamber is interposed in alignment therebetween to form part of said combined chamber, said junction element being pivotable about an axis located outside of said combined chamber and extending parallel to the combined chamber.
Claim 5
Dependent Claim
33 words
Apparatus according to claim 1, further comprising vibrating means associated with at least one of said chromatographic column and said compression chamber for promoting transverse rearrangement of said packing particles during compression thereof.
Claim 6
Dependent Claim
38 words
Apparatus according to claim 1, wherein a filling channel is formed through said piston for introducing a suspension of packing particles into said combined chamber, and a valve is provided for selectively opening and closing said filling channel.
Claim 7
Dependent Claim
28 words
Apparatus according to claim 1, wherein both said piston and said other end closure means are provided with conduits through which suspending liquid may exit said combined chamber.
Claim 8
Dependent Claim
28 words
Apparatus according to claim 1, wherein a collector depression is formed on the inside face of said piston communicating with said conduit and covered by a porous sheet.
Claim 9
Dependent Claim
16 words
Apparatus according to claim 1, further comprising a valve for selectively opening and closing said conduit.
Claim 10
Dependent Claim
137 words
A process for filling a chromatographic column having a defined bore, said process comprising the steps of: attaching a compression chamber having a bore the same as the bore of the chromatographic column to be filled to one end of said chromatographic column in alignment therewith to form a combined chamber; filling said combined chamber with a suspension of packing particles in a suspending liquid; urging a piston sealingly disposed in the bore of said compression chamber axially toward said chromatographic column whereby said packing particles are compacted in said combined chamber and said suspending liquid is forced to exit said combined chamber through a conduit formed through at least one of said piston and means for closing the other end of said chromatographic column; and detaching said compression chamber and a piston from said chromatographic column.
Claim 11
Dependent Claim
137 words
A process for filling a chromatographic column having a defined bore, said process comprising the steps of: attaching a compression chamber having a bore the same as the bore of the chromatographic column to be filled to one end of said chromatographic column in alignment therewith to form a combined chamber; filling said combined chamber with a suspension of packing particles in a suspending liquid; urging a piston sealingly disposed in the bore of said compression chamber axially toward said chromatographic column whereby said packing particles are compacted in said combined chamber and said suspending liquid is forced to exit said combined chamber through a conduit formed through at least one of said piston and means for closing the other end of said chromatographic column; and detaching said compression chamber and a piston from said chromatographic column.
Claim 12
Dependent Claim
33 words
A process according to claim 9, wherein said suspension is filled into said combined chamber through a filling channel formed through said piston, and said filling channel is thereafter closed by a valve.
Claim 13
Dependent Claim
36 words
A process according to claim 9, wherein said suspension is filled into said combined chamber through said other end of said chromatographic column after which said other end is closed by said other end closing means.
Claim 14
Dependent Claim
38 words
A process according to claim 9, further comprising the step of vibrating said combined chamber to promote transverse rearrangement of said packing particles as the piston is urged toward the chromtographic column and said packing particles are compacted.
Claim 15
Dependent Claim
26 words
A process according to claim 12, wherein said vibrating is effected by a piezoelectric vibrator associated with one of said chromatographic column and said compression chamber.
Claim 16
Dependent Claim
29 words
A process according to claim 12, wherein said vibrating is effected by a liquid pressure activated mechanical vibrator associated with one of said chromatographic column and said compression chamber.
Claim 17
Dependent Claim
29 words
A process according to claim 12, wherein said vibrating is effected by application of fluid pressure to the side of one of said chromatographic column and said compression chamber.
Claim 18
Dependent Claim
30 words
A process according to claim 9, further comprising the steps of attaching an end closure to said one end of said chromatographic column and connecting the column to a chromatograph.
Claim 19
Dependent Claim
43 words
A process according to claim 9, wherein said suspension is filled into said combined chamber by removing said piston from said compression chamber, introducing the liquid suspension of packing particles through said compression chamber, and thereafter replacing said piston in said compression chamber.
Claim 20
Dependent Claim
36 words
A process according to claim 9, further comprising the step of leveling off the top of the packing particles after compaction by pivoting a pivotable junction element interposed between said chromatographic column and said compression chamber.
References Cited (Backward Citations)
US2998036A
Cited
US3300849A
Cited
US3511377A
Cited
US3398512A
Cited
US3440864A
Cited
US3615235A
Cited
US3966609A
Cited
US3935884A
Cited
US4280905A
Cited
US4361482A
Cited
US4451365A
Cited
US4483374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |