US4259186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gel filtration column
Assignee: Roehm GmbH Darmstadt
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Filing: 1979-02-13
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Granted: 1981-03-31
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Expires: 1999-02-13
Abstract
Abstract What is disclosed is an elongated gel filtration column having an outer wall and at least one gel chamber defined therein and adapted to be filled with a filter gel, said gel chamber being subdivided by a plurality of interior partition walls arranged parallel to the column wall, said partition walls being of a length shorter than the length of the gel chamber.
Inventors
- 👤 Joseph Boeing
- 👤 Hermann A. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/22; B01D15/26; B01D15/34; G01N30/60; G01N30/6052; G01N30/6069; G01N30/6034; G01N30/6043
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
An elongated gel filtration column having an outer wall and opposed inlet and outlet ends, said outer wall defining at least one gel chamber adapted to be filled with a filter gel, a pair of perforated trays respectively secured to said wall at said inlet and outlet ends, and inlet and outlet chambers respectively secured to said outer wall at said inlet and outlet ends in communication with said gel chamber through said perforated trays, said gel chamber being subdivided by a plurality of interior longitudinally extending partition walls arranged parallel to each other, said partition walls being of a length which is shorter than the length of the gel chamber and having free ends respectively inwardly spaced from said trays whereby the filter gel in said filter chamber is located between said partition walls and in the space between the ends of said walls and said trays and is subjected to substantially uniform pressure throughout the column.
Claim 2
Dependent Claim
158 words
An elongated gel filtration column having an outer wall and opposed inlet and outlet ends, said outer wall defining at least one gel chamber adapted to be filled with a filter gel, a pair of perforated trays respectively secured to said wall at said inlet and outlet ends, and inlet and outlet chambers respectively secured to said outer wall at said inlet and outlet ends in communication with said gel chamber through said perforated trays, said gel chamber being subdivided by a plurality of interior longitudinally extending partition walls arranged parallel to each other, said partition walls being of a length which is shorter than the length of the gel chamber and having free ends respectively inwardly spaced from said trays whereby the filter gel in said filter chamber is located between said partition walls and in the space between the ends of said walls and said trays and is subjected to substantially uniform pressure throughout the column.
Claim 3
Dependent Claim
33 words
A gel filtration column as in claim 1, wherein said plurality of partition walls are spaced from each other and from the column wall by distances of from 20 mm to 120 mm.
Claim 4
Dependent Claim
33 words
A gel filtration column as in claim 2 wherein said plurality of partition walls are spaced from each other and from the column wall by distances of from 40 mm to 80 mm.
Claim 5
Dependent Claim
22 words
A gel filtration column as in claim 1 wherein said plurality of partition walls are present in said column as concentric tubes.
Claim 6
Dependent Claim
41 words
A gel filtration column as in claim 1 wherein said gel chamber is filled with a filter gel in an amount such that the volume of the filter gel, when swollen, is greater than the free volume of the gel chamber.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |