Patent US5169522A successfully refreshed from Google Patents.
US5169522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Column slurry packing compressor
Assignee: Alltech Associates Inc
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Filing: 1990-09-25
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Granted: 1992-12-08
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Expires: 2010-09-25
Abstract
Abstract A liquid chromatography column that can be rapidly packed without a reservoir column is disclosed. The column includes a double sealed compressor piston with a mixture delivery bore extending through the body of the piston. Resilient sealing means are provided in annular grooves provided in the piston. The piston retains a frit and slurry scraper is mounted to the piston. A method of packing such a column is also disclosed. An outlet end plate including solvent drainage bores is provided. A threaded end cap including radial slots in an inner surface for a threaded column is disclosed, as is an adaptor for joining flanged and threaded columns.
Inventors
- 👤 Yehuda Shalon
- 👤 Tadmor Shalon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:48
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; G01N30/60; G01N30/6004; G01N30/6021; G01N30/52; G01N2030/522; G01N2030/562; G01N2030/565; G01N30/6017; G01N30/6034
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
A slurry packing compressor for use in a chromatographic column adapted to contain a bed of particles comprising a slurry, said packing compressor comprising: a generally cylindrical metallic piston; means for receiving resilient means adapted to seal an interface of said chromatographic column and said piston; means for enabling material to be separated to be injected into said bed of particles; means for dispersing the material to be separated throughout the chromatography column, said dispersing means comprising a plurality of radially extending grooves provided in a slurry facing end surface of said generally cylindrical metallic piston; and means for retaining a frit comprising a threaded portion, said piston including a threaded portion adjacent the slurry contacting end face of said piston and adapted to engage said threaded portion of said frit retaining means, said frit retaining means further comprising means for receiving a frit sealing means.
Claim 2
Dependent Claim
146 words
A slurry packing compressor for use in a chromatographic column adapted to contain a bed of particles comprising a slurry, said packing compressor comprising: a generally cylindrical metallic piston; means for receiving resilient means adapted to seal an interface of said chromatographic column and said piston; means for enabling material to be separated to be injected into said bed of particles; means for dispersing the material to be separated throughout the chromatography column, said dispersing means comprising a plurality of radially extending grooves provided in a slurry facing end surface of said generally cylindrical metallic piston; and means for retaining a frit comprising a threaded portion, said piston including a threaded portion adjacent the slurry contacting end face of said piston and adapted to engage said threaded portion of said frit retaining means, said frit retaining means further comprising means for receiving a frit sealing means.
Claim 3
Dependent Claim
34 words
The slurry packing compressor according to claim 1, said receiving means comprising a plurality of annular grooves provided in a cylindrical surface of said piston, each said groove adapted to receive resilient sealing means.
Claim 4
Dependent Claim
22 words
The slurry packing compressor according to claim 2, each said resilient sealing means comprising a resilient O-ring and a backup spacer member.
Claim 5
Dependent Claim
20 words
The slurry packing compressor of claim 3, wherein said backup spacer member comprises a split ring of glass loaded polymer.
Claim 6
Dependent Claim
30 words
The slurry packing compressor of claim 3, wherein said resilient O-ring is positioned within each said groove to be closer to a slurry bed facing end surface of said piston.
Claim 7
Dependent Claim
24 words
The slurry packing compressor of claim 3, said piston further comprising means for applying a hydraulic packing pressure against a slurry in said column.
Claim 8
Dependent Claim
25 words
The slurry packing compressor of claim 6, said piston further comprising means for maintaining a packed slurry bed during use of said column for separation.
Claim 9
Dependent Claim
31 words
The slurry packing compressor of claim 1, said frit means further comprising means for mating with a tool for tightening and loosening said frit retaining means with respect to said piston.
Claim 10
Dependent Claim
21 words
The slurry packing compressor according to claim 1, said frit retaining means further comprising means for receiving a slurry scraping member.
Claim 11
Dependent Claim
28 words
The slurry packing compressor according to claim 9, said slurry scraping means comprising an annular member threadably engageable with a mating threaded portion of said frit retaining means.
Claim 12
Dependent Claim
18 words
The slurry packing compressor of claim 1, said means for enabling comprising a bore extending through said piston.
Claim 13
Dependent Claim
36 words
The slurry packing compressor according to claim 11, said bore comprising means for sealably mating with a supply line for delivering material to be separated through said piston into a packed bed retained in said column.
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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) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |