US4675104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatography column
Assignee: AMF Inc A CORP OF NJ
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Filing: 1985-04-16
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Granted: 1987-06-23
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Expires: 2005-04-16
Abstract
Abstract A chromatography column for effecting chromatographic separation of at least two components of a sample flowing through the column. The column comprises a housing and at least one solid stationary phase within the housing. The stationary phase has chromatographic functionality and is effective for chromatographic separation. Means are provided for distributing the sample through the stationary phase and for collecting the sample after the sample has flowed through the stationary phase. The stationary phase comprises: (a) a plurality of layers of swellable fibrous matrix in sheet form having chromatographic functionality and being effective for chromatographic separation; and (b) a spacer means between each layer for permitting controlled swelling thereof and enhancing the distribution of sample flowing through the stationary phase.
Inventors
- 👤 Vish Rai
- 👤 Kenneth Southall
- 👤 Timothy Webster
- 👤 Gordon Leeke
- 👤 Chaokang Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:50
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6052; G01N30/6069; B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/22; G01N30/6091; G01N33/00; G01N33/26; G01N33/28
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
118 words
A chromatography column for effecting chromatographic separation of at least two components of a sample flowing therethrough comprising: a housing; at least one solid stationary phase in said housing, comprising: (a) a plurality of layers of sheets of swellable fibrous matrix having chromatographic functionality and being effective for chromatographic separation, and (b) a spacer means between each said fibrous matrix layer having open areas and separating said layers for controlling swelling of the matrix and enhancing the distribution of sample flowing through the stationary phase by substantially evenly dispersing the sample across the matrix; means for distributing the sample through the stationary phase; and means for collecting the sample after the sample has flowed through the stationary phase.
Claim 2
Dependent Claim
118 words
A chromatography column for effecting chromatographic separation of at least two components of a sample flowing therethrough comprising: a housing; at least one solid stationary phase in said housing, comprising: (a) a plurality of layers of sheets of swellable fibrous matrix having chromatographic functionality and being effective for chromatographic separation, and (b) a spacer means between each said fibrous matrix layer having open areas and separating said layers for controlling swelling of the matrix and enhancing the distribution of sample flowing through the stationary phase by substantially evenly dispersing the sample across the matrix; means for distributing the sample through the stationary phase; and means for collecting the sample after the sample has flowed through the stationary phase.
Claim 3
Dependent Claim
13 words
The column of claim 1 wherein the swellable fibrous matrix is hydrophilic swellable.
Claim 4
Dependent Claim
54 words
The column of claim 1 wherein the spacer means comprises: (a) means for channeling the sample flow through the matrix and substantially evenly dispersing the sample; or (b) means for providing a spacing between the layers to permit controlled expansion thereof and assist in distributing the sample; or (c) (a) in combination with (b).
Claim 5
Dependent Claim
30 words
The column of claim 3 wherein said means comprises a mesh layer to provide a spacing between the layers to permit controlled expansion thereof and assist in distributing the sample.
Claim 6
Dependent Claim
19 words
The colun of claim 1 wherein the swellable fibrous matrix swells to at least about 25% of its thickness.
Claim 7
Dependent Claim
142 words
A chromatography column for effecting chromatographic separation of at least two components of a sample flowing therethrough comprising: (1) a housing, said housing comprising: (a) an inlet housing member, and (b) an outlet housing member, said inlet housing member and said outlet housing member defining a stationary phase chamber; and (2) a stationary phase within said stationary phase chamber, said stationary phase comprising: (a) a plurality of layers of a swellable fibrous matrix in sheet form having chromatographic functionality and being effective for chromatographic separation, and (b) a space means between each layer of said swellable fibrous matrix having open areas and separating said layers for permitting controlled swelling thereof and enhancing the distribution of sample flowing through said stationary phase, wherein said stationary phase chamber and said stationary phase coact to provide substantially uniform distribution of sample across said stationary phase.
Claim 8
Dependent Claim
142 words
A chromatography column for effecting chromatographic separation of at least two components of a sample flowing therethrough comprising: (1) a housing, said housing comprising: (a) an inlet housing member, and (b) an outlet housing member, said inlet housing member and said outlet housing member defining a stationary phase chamber; and (2) a stationary phase within said stationary phase chamber, said stationary phase comprising: (a) a plurality of layers of a swellable fibrous matrix in sheet form having chromatographic functionality and being effective for chromatographic separation, and (b) a space means between each layer of said swellable fibrous matrix having open areas and separating said layers for permitting controlled swelling thereof and enhancing the distribution of sample flowing through said stationary phase, wherein said stationary phase chamber and said stationary phase coact to provide substantially uniform distribution of sample across said stationary phase.
Claim 9
Dependent Claim
57 words
The column of claim 6 wherein said inlet housing member comprises a sample inlet means and a sample distribution means, said sample inlet means in communication with said sample distribution means, and said outlet housing means comprises a sample collection means and a sample outlet means, said sample collection means in communication with said sample outlet means.
Claim 10
Dependent Claim
15 words
The column of claim 6 wherein said inlet housing member further comprises a venting means.
Claim 11
Dependent Claim
13 words
The column of claim 6 wherein said swellable fibrous matrix is hydrophilic swellable.
Claim 12
Dependent Claim
19 words
The column of claim 6 wherein said swellable fibrous matrix swells to at least about 25% of its thickness.
Claim 13
Dependent Claim
58 words
The column of claim 6 wherein said spacer means comprises: (a) a scrim layer for channeling the sample flow through the matrix and substantially evenly dispersing the sample; or (b) a mesh layer to provide a spacing between the layers to permit controlled expansion thereof and assist in distributing the sample; or (c) (a) in combination with (b).
Claim 14
Dependent Claim
31 words
The column of claim 6, wherein said spacer means comprises a mesh layer to provide spacing between said layers to permit controlled expansion thereof and assist in distribution of the sample.
Claim 15
Dependent Claim
91 words
A solid stationary phase having chromatographic functionality and being effective for chromatographic separation of at least two components of a sample flowing therethrough wherein the stationary phase comprises: (a) a plurality of layers of sheets of a swellable fibrous matrix having chromatographic functionality and being effective for chromatographic separation, and (b) a spacer means between each layer having open areas and separating the layers for permitting controlled swelling of the matrix and enhancing the distribution of sample flowing through the stationary phase by substantially evenly dispersing the sample across the matrix.
Claim 16
Dependent Claim
91 words
A solid stationary phase having chromatographic functionality and being effective for chromatographic separation of at least two components of a sample flowing therethrough wherein the stationary phase comprises: (a) a plurality of layers of sheets of a swellable fibrous matrix having chromatographic functionality and being effective for chromatographic separation, and (b) a spacer means between each layer having open areas and separating the layers for permitting controlled swelling of the matrix and enhancing the distribution of sample flowing through the stationary phase by substantially evenly dispersing the sample across the matrix.
Claim 17
Dependent Claim
18 words
The stationary phase of claim 13 wherein the swellable matrix swells at least about 25% of its thickness.
Claim 18
Dependent Claim
13 words
The stationary phase of claim 13 wherein the swellable matrix is hydrophilic swellable.
Claim 19
Dependent Claim
59 words
The stationary phase of claim 13 wherein said spacer means comprises: (a) a scrim layer for channeling the sample flow through the matrix and substantially evenly dispersing the sample; or (b) a mesh layer to provide a spacing between the layers to permit controlled expansion thereof and assist in distributing the sample; or (c) (a) in combination with (b).
Claim 20
Dependent Claim
15 words
The stationary phase of claim 13 wherein the spacer means comprises said mesh layer (b).
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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |