Patent US4882047A successfully refreshed from Google Patents.
US4882047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zero-void column end plate for chromatography
Assignee: Alltech Associates Inc
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Filing: 1989-03-27
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Granted: 1989-11-21
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Expires: 2009-03-27
Abstract
Abstract In chromatography columns, a pair of end plates mounting upon integral column flanges provided at either end of said chromatography column, each end plate mounting a series of frits and O-rings in place within cylindrical grooves provided within each end of the column, each end plate arranged contiguously with the enclosed frits incorporating a series of radially disposed grooves, to provide for dissemination of the incoming chemicals uniformly about the entire cross-section of the column chamber, to provide for efficient dispersion of said chemicals throughout the entire slurry packing contained therein, and incorporating equivalent grooves upon the inner surface of the end plate connecting with the outlet end of the column, to assure uniformity of collection of the chromatography treated chemicals as they are discharged to a location for usage or collection.
Inventors
- 👤 Yehuda Shalon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:47
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/14; G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/603; G01N30/6034; G01N30/6039; G01N30/6052; G01N30/6069; G01N30/6017; G01N30/6026
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
322 words
A high-pressure liquid chromatography column comprising: (a) a column member, said column member having a first end and a second end, the interior of said column member being a chamber adapted to retain a media; (b) a first flange member, said first flange member being positioned at said first end of said column member; (c) a second flange member, said second flange member being located at said second end of said column member; (d) a first end plate, said first end plate being adapted to be mounted at said first end of said column member and having an inlet port; (e) a second end plate, said second end plate being adapted to be mounted at said second end of said column member and having an outlet port; (f) a first frit means, said first frit means being adapted to be mounted at said first end of said column member, between said first end plate and the interior of said column member, said first frit means being porous and comprising means for providing fluid communication between said inlet port and the interior of said column member; wherein at least said first end plate includes dispersion means, said dispersion means comprising radially extending grooves in a surface of said first end plate proximate said first frit means, said grooves extending radially toward the periphery of said plate and increasing in volume towards the periphery of said plate, wherein each groove increases in depth in a direction toward the periphery of said plate and wherein each groove also increases in width in a direction towards the periphery of said plate, whereby fluid is adapted to flow uniformly across the surface of said first frit means and consequently uniformly from said column member first end to said column member second end, thereby enhancing the separation attributes of the column during performance of a chromatography process, wherein said first end plate surface includes no other grooves thereon.
Claim 2
Dependent Claim
322 words
A high-pressure liquid chromatography column comprising: (a) a column member, said column member having a first end and a second end, the interior of said column member being a chamber adapted to retain a media; (b) a first flange member, said first flange member being positioned at said first end of said column member; (c) a second flange member, said second flange member being located at said second end of said column member; (d) a first end plate, said first end plate being adapted to be mounted at said first end of said column member and having an inlet port; (e) a second end plate, said second end plate being adapted to be mounted at said second end of said column member and having an outlet port; (f) a first frit means, said first frit means being adapted to be mounted at said first end of said column member, between said first end plate and the interior of said column member, said first frit means being porous and comprising means for providing fluid communication between said inlet port and the interior of said column member; wherein at least said first end plate includes dispersion means, said dispersion means comprising radially extending grooves in a surface of said first end plate proximate said first frit means, said grooves extending radially toward the periphery of said plate and increasing in volume towards the periphery of said plate, wherein each groove increases in depth in a direction toward the periphery of said plate and wherein each groove also increases in width in a direction towards the periphery of said plate, whereby fluid is adapted to flow uniformly across the surface of said first frit means and consequently uniformly from said column member first end to said column member second end, thereby enhancing the separation attributes of the column during performance of a chromatography process, wherein said first end plate surface includes no other grooves thereon.
Claim 3
Dependent Claim
26 words
The high pressure liquid chromatography column of claim 1, wherein said first end plate has twenty-four grooves radially spaced around the center of the end plate.
Claim 4
Dependent Claim
21 words
The high pressure liquid chromatography column of claim 1, wherein adjacent grooves are separated from each other by approximately fifteen degrees.
Claim 5
Dependent Claim
30 words
The high pressure liquid chromatography column of claim 1, wherein said grooves are separated from any media adapted to be positioned in said column member by a pair of frits.
Claim 6
Dependent Claim
73 words
The high pressure liquid chromatography column of claim 1, wherein said first end plate is contiguous with said first flange member and said second end plate is contiguous with said second flange member, and further comprising a first O-ring to provide a fluid seal between said first end plate and said first flange member and a second O-ring to provide a fluid seal between said second end plate and said second flange member.
Claim 7
Dependent Claim
23 words
The high pressure liquid chromatography column of claim 1, wherein each pair of frit means comprises an inner and an outer porous frit.
Claim 8
Dependent Claim
21 words
The high pressure liquid chromatography column of claim 6, wherein said outer frit has a high density center portion formed therein.
Claim 9
Dependent Claim
25 words
The high pressure liquid chromatography column of claim 6, further comprising an O-ring, said O-ring being positioned between said inner and said outer porous frit.
Claim 10
Dependent Claim
103 words
The high pressure liquid chromatography column of claim 8, and further comprising a first adapter means in fluid communication with said inlet port and second adaptor means in fluid communication with said outlet port, and wherein each adaptor means includes a seal, a head portion and a body portion, said body portion including threads thereon, and designed for threaded engagement within an end plate, each of said head portions being adapted to have a shoulder formed proximate its body portion, said shoulder being designed for cooperating with said seal to form a fluid tight seal between said adaptor and a respective end plate.
Claim 11
Dependent Claim
28 words
The high pressure liquid chromatography column of claim 9, wherein each said adaptor shoulder has a groove formed therein, said groove being designed for accommodating said seal therein.
Claim 12
Dependent Claim
63 words
The high pressure liquid chromatography column of claim 1, further comprising a second frit means, said second frit means being mounted at said second end of said column member, between said second end plate and the interior of said column member, said second frit means being porous and providing for fluid communication between said outlet port and the interior of said column member.
Claim 13
Dependent Claim
26 words
The high pressure liquid chromatography column of claim 1, wherein a chromatography separation media is packed into said chamber between said first and second end plates.
Claim 14
Dependent Claim
53 words
The high pressure liquid chromatography column of claim 1, wherein said first end plate is mounted onto said first end of said column member, said second end plate is mounted on the second end of said column member, and said first frit means is mounted at said first end of said column member.
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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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |