US4250141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Column for the removal of undesired substances from a liquid mixture
Assignee: Gambro Dialysatoren GmbH and Co KG
•
Filing: 1978-12-15
•
Granted: 1981-02-10
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Expires: 1998-12-15
Abstract
Abstract A column for removing poisons and/or other undesired substances from a liquid mixture. The column has a mixture of inactive filler particles and active granules positioned therein, with said filler particles being substantially larger than said active granules, (which are selected from adsorbing material and ion-exchanging material). The filler particles are in fixed contact relationship with each other and the active granules completely fill the spaces between the filler particles.
Inventors
- 👤 Hans-Dieter Lehmann
- 👤 Peter Konstantin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:07
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3679; B; B01; B01D; B01D15/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
140 words
A column for removal of undesired substances from a liquid mixture, comprising an outer casing having an inlet and an outlet for the liquid mixture; filler particles partially filling said casing, which filler particles are substantially inactive to said liquid mixture; and active granules filling the remainder of said casing, said active granules being capable of removing said undesired substances from said liquid mixture as said liquid mixture passes through said casing from said inlet to said outlet and being formed of a material selected from the group consisting of adsorbing material and ion-exchanging material, wherein said filler particles are substantially larger than said active granules and wherein said filler particles are in fixed contact relationship with each other and extend from said inlet to said outlet with said active granules essentially completely filling in spaces between said filler particles.
Claim 2
Dependent Claim
140 words
A column for removal of undesired substances from a liquid mixture, comprising an outer casing having an inlet and an outlet for the liquid mixture; filler particles partially filling said casing, which filler particles are substantially inactive to said liquid mixture; and active granules filling the remainder of said casing, said active granules being capable of removing said undesired substances from said liquid mixture as said liquid mixture passes through said casing from said inlet to said outlet and being formed of a material selected from the group consisting of adsorbing material and ion-exchanging material, wherein said filler particles are substantially larger than said active granules and wherein said filler particles are in fixed contact relationship with each other and extend from said inlet to said outlet with said active granules essentially completely filling in spaces between said filler particles.
Claim 3
Dependent Claim
14 words
A column according to claim 1, wherein said active granules consist of activated charcoal.
Claim 4
Dependent Claim
16 words
A column according to claim 1, wherein said active granules consists of an adsorbing polymer material.
Claim 5
Dependent Claim
23 words
A column according to claim 1, wherein said filler particles are about 5 to about 50 times as large as said active granules.
Claim 6
Dependent Claim
23 words
A column according to claim 1, wherein said filler particles are about 10 to about 25 times as large as said active granules.
Claim 7
Dependent Claim
23 words
A column according to claim 1, wherein said filler particles occupy from about 25 to about 75% by volume of said coulmn casing.
Claim 8
Dependent Claim
23 words
A column according to claim 1, wherein said filler particles occupy from about 40 to about 60% by volume of said column casing.
Claim 9
Dependent Claim
21 words
A column according to claim 1, wherein said filler particles and said casing are formed of a biocompatible synthetic polymeric material.
Claim 10
Dependent Claim
18 words
A column according to claim 1 or 8, wherein said filler particles have hydrodynamically and hemodynamically favourable shapes.
Claim 11
Dependent Claim
13 words
A column according to claim 9, wherein said filler particles are spherically shaped.
Claim 12
Dependent Claim
77 words
A column according to claim 1, wherein said casing consists of a substantially cylindrical central casing part; two end parts, one on each end of said central casing part, said end parts being conically shaped and defining connecting nozzles which serve as said inlet and said outlet; and supporting means arranged at the connection between said end parts and said central casing part for supporting said filler particles and said active granules in said central casing part.
Claim 13
Dependent Claim
76 words
A column according to claim 1, wherein said casing consists of a double-conical central casing part; two end parts, one on each end of said central casing part, said end parts being conically shaped and defining connecting nozzles which serve as said inlet and said outlet; and supporting means arranged at the connection between said end parts and said central casing part for supporting said filler particles and said active granules in said central casing part.
Claim 14
Dependent Claim
25 words
A column according to claim 11 or 12, wherein said filler particles completely fill the space in said central casing part between said supporting means.
Claim 15
Dependent Claim
21 words
A column according to claim 1 or 12, wherein said casing consists of two substantially identical halves which are joined together.
Claim 16
Dependent Claim
13 words
A column according to claim 14, wherein said two halves are welded together.
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |