Patent US4601831A successfully refreshed from Google Patents.
US4601831A
Expired / Lapsed
US
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Antimicrobial adjustment technique
Assignee: ATK Launch Systems LLC
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Filing: 1984-10-03
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Granted: 1986-07-22
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Expires: 2004-10-03
Abstract
Abstract A system containing beds of polymeric material containing antimicrobial agents are used to adjust the antimicrobial agent concentration of treatment streams used for treating fibers with antimicrobial agents. The adjustment step is performed by passing the stream through a bed which contains the agent in a concentration different than that of the stream.
Inventors
- 👤 Michael M. Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:39
CPC Classifications
A; A01; A01N; A01N39/00; D; D06; D06M; D06M16/00; C; C02; C02F; C02F1/00; C02F1/50; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
A method of adjusting antimicrobial agent concentration of an aqueous media, comprising: obtaining a first stream of antimicrobial agent containing aqueous media from an antimicrobial treatment vessel; passing said first stream through and in contact with a bed of solid polyamide absorbant material, said polyamide absorbant material containing a concentration of the same antimicrobial agent that is different from that in said first stream whereby the antimicrobial agent concentration in said stream is adjusted, said antimicrobial agent having a partition coefficient, defined as the ratio of antimicrobial agent absorbed by the polyamide absorbant relative to that retained in the aqueous media at equilibrium, of at least about 10:1 to either increase or decrease the antimicrobial concentration in said stream; and then returning said adjusted stream to said antimicrobial treatment vessel.
Claim 2
Independent Claim
130 words
A method of adjusting antimicrobial agent concentration of an aqueous media, comprising: obtaining a first stream of antimicrobial agent containing aqueous media from an antimicrobial treatment vessel; passing said first stream through and in contact with a bed of solid polyamide absorbant material, said polyamide absorbant material containing a concentration of the same antimicrobial agent that is different from that in said first stream whereby the antimicrobial agent concentration in said stream is adjusted, said antimicrobial agent having a partition coefficient, defined as the ratio of antimicrobial agent absorbed by the polyamide absorbant relative to that retained in the aqueous media at equilibrium, of at least about 10:1 to either increase or decrease the antimicrobial concentration in said stream; and then returning said adjusted stream to said antimicrobial treatment vessel.
Claim 3
Dependent Claim
44 words
The method of claim 1 wherein: said antimicrobial agent is present in said bed of polyamide material in a concentration greater than that of said first stream whereby the antimicrobial agent concentration of said returned stream is higher than that of the first stream.
Claim 4
Dependent Claim
44 words
The method of claim 1, wherein: said antimicrobial agent is present in said bed of polyamide material in a concentration less than that of said first stream whereby the antimicrobial agent concentration of the returned stream is lower than that of the first stream.
Claim 5
Dependent Claim
11 words
The method of claim 1, wherein: said polyamide material comprises nylon.
Claim 6
Dependent Claim
11 words
The method of claim 4, wherein: said antimicrobial agent comprises 10,10'-oxybisphenoxarsine.
Claim 7
Dependent Claim
35 words
The method of claim 5, wherein: said nylon is in the form of a member selected from the group consisting of a fiber, a granule, a film, a foam, a coated article, and a pellet.
Claim 8
Dependent Claim
15 words
The method of claim 6, wherein: said nylon is in the form of a pellet.
Claim 9
Dependent Claim
11 words
The method of claim 1, wherein: said antimicrobial agent comprises 10,10'-oxybisphenoxarsine.
Claim 10
Independent Claim
145 words
A system for adjusting antimicrobial agent concentration of an aqueous medium, comprising: a vessel for treating a fiber with an aqueous medium containing an antimicrobial agent, having a partition coefficient, defined as the ratio of antimicrobial agent absorbed by the polyamide absorbant relative to that retained in the aqueous media at equilibrium, of at least about 10:1 to either increase or decrease the antimicrobial concentration in said aqueous medium transfer means for passing and returning said medium from said treatment vessel to a second vessel which contains a bed of polyamide absorbant material which contains the same antimicrobial agent as said aqueous medium, and transfer means for passing and returning said medium from said treatment vessel to a third vessel contains a bed of polyamide absorbant material which contains the same antimicrobial agent as said aqueous medium at a concentration less than said second vessel.
Claim 11
Independent Claim
145 words
A system for adjusting antimicrobial agent concentration of an aqueous medium, comprising: a vessel for treating a fiber with an aqueous medium containing an antimicrobial agent, having a partition coefficient, defined as the ratio of antimicrobial agent absorbed by the polyamide absorbant relative to that retained in the aqueous media at equilibrium, of at least about 10:1 to either increase or decrease the antimicrobial concentration in said aqueous medium transfer means for passing and returning said medium from said treatment vessel to a second vessel which contains a bed of polyamide absorbant material which contains the same antimicrobial agent as said aqueous medium, and transfer means for passing and returning said medium from said treatment vessel to a third vessel contains a bed of polyamide absorbant material which contains the same antimicrobial agent as said aqueous medium at a concentration less than said second vessel.
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USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |