Patent US5840343A successfully refreshed from Google Patents.
US5840343A
Expired / Lapsed
US
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Room temperature sterilant for medical devices
Assignee: Medivators Inc
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Filing: 1997-04-08
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Granted: 1998-11-24
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Expires: 2017-04-08
Abstract
Abstract Provided is an anti-microbial composition containing an ester of formic acid, an oxidizer, performic acid and water. Also provided is a premix for making the anti-microbial composition having two parts. One part contains the ester of formic acid and a second part contains the oxidizer. Another method is provided for making the anti-microbial composition in which the ester of formic acid is combined with the oxidizer and water. A further method is provided for sterilizing medical devices, including dialyzer filter modules, wherein the anti-microbial composition is capable of a 1:1 to a 1:12 dilution with water.
Inventors
- 👤 II Robert T. Hall
- 👤 Bradley K. Onstad
- 👤 Daniel B. Carlsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:31
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/18; A61L2/186; A01; A01N; A01N37/00; A01N37/16; A01N59/00; A61L2103/00; A61L2103/15
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
64 words
A method of sterilizing a filter module with an anti-microbial composition comprising contacting the filter module with the anti-microbial composition comprising from about 0.01 to about 10.0 wt. % of an ester of formic acid; from about 0.01 to about 10.0 wt. % of an oxidizer; from about 0.001 to about 5.0 wt. % performic acid and up to about 99.98 wt. % water.
Claim 2
Independent Claim
64 words
A method of sterilizing a filter module with an anti-microbial composition comprising contacting the filter module with the anti-microbial composition comprising from about 0.01 to about 10.0 wt. % of an ester of formic acid; from about 0.01 to about 10.0 wt. % of an oxidizer; from about 0.001 to about 5.0 wt. % performic acid and up to about 99.98 wt. % water.
Claim 3
Dependent Claim
33 words
A method of sterilizing a filter module according to claim 1, wherein the ester of formic acid is selected from the group consisting of ethyl formate, methyl formate, propyl formate, and mixtures thereof.
Claim 4
Dependent Claim
17 words
A method of sterilizing a filter module according to claim 1, wherein the oxidizer is hydrogen peroxide.
Claim 5
Dependent Claim
20 words
A method of sterilizing a filter module according to claim 2, wherein the ester of formic acid is ethyl formate.
Claim 6
Dependent Claim
26 words
A method of sterilizing a filter module according to claim 2, wherein the ester of formic acid is ethyl formate and the oxidizer is hydrogen peroxide.
Claim 7
Dependent Claim
62 words
A method of sterilizing a filter module according to claim 5, wherein ethyl formate is in an amount from about 0.02 to about 5.0 wt. %; hydrogen peroxide is in an amount from about 0.02 to about 5.0 wt. %; performic acid is in an amount from about 0.001 to about 1.0 wt. %; and up to about 99.98 wt. % water.
Claim 8
Independent Claim
42 words
A method of sterilizing a filter module with an anti-microbial composition comprising contacting the filter module with the anti-microbial composition provided by combining about 2.2 wt. % ester of formic acid, about 7.0 wt. % oxidizer, and about 90.8 wt. % water.
Claim 9
Independent Claim
42 words
A method of sterilizing a filter module with an anti-microbial composition comprising contacting the filter module with the anti-microbial composition provided by combining about 2.2 wt. % ester of formic acid, about 7.0 wt. % oxidizer, and about 90.8 wt. % water.
Claim 10
Dependent Claim
33 words
A method of sterilizing a filter module according to claim 7, wherein the ester of formic acid is selected from the group consisting of ethyl formate, methyl formate, propyl formate, and mixtures thereof.
Claim 11
Dependent Claim
17 words
A method of sterilizing a filter module according to claim 7, wherein the oxidizer is hydrogen peroxide.
Claim 12
Dependent Claim
20 words
A method of sterilizing a filter module according to claim 8, wherein the ester of formic acid is ethyl formate.
Claim 13
Dependent Claim
26 words
A method of sterilizing a filter module according to claim 8, wherein the ester of formic acid is ethyl formate and the oxidizer is hydrogen peroxide.
Claim 14
Dependent Claim
38 words
A method of sterilizing a filter module according to claim 11, wherein the anti-microbial composition is capable of dilution with water such that the oxidizer is present in an amount between about 0.1 to about 2.0 wt. %.
Claim 15
Independent Claim
88 words
A method of sterilizing a filter module with an anti-microbial composition comprising: (a) providing an anti-microbial composition comprising from about 0.01 to about 10.0 wt. % of an ester of formic acid; from about 0.01 to about 10.0 wt. % of an oxidizer; from about 0.001 to about 5.0 wt. % performic acid and up to about 99.98 wt. % water; (b) diluting the anti-microbial composition from about 1:1 to about 1:12 with water; and (c) contacting the filter module with a diluted anti-microbial composition from step (b).
Claim 16
Independent Claim
88 words
A method of sterilizing a filter module with an anti-microbial composition comprising: (a) providing an anti-microbial composition comprising from about 0.01 to about 10.0 wt. % of an ester of formic acid; from about 0.01 to about 10.0 wt. % of an oxidizer; from about 0.001 to about 5.0 wt. % performic acid and up to about 99.98 wt. % water; (b) diluting the anti-microbial composition from about 1:1 to about 1:12 with water; and (c) contacting the filter module with a diluted anti-microbial composition from step (b).
Claim 17
Dependent Claim
40 words
A method of sterilizing a filter module with an anti-microbial composition according to claim 13, wherein the diluted anti-microbial composition from step (b) is characterized as including the oxidizer in an amount between about 0.1 to about 2.0 wt. %.
Claim 18
Independent Claim
97 words
A method of sterilizing a filter module comprising contacting the filter module with an anti-microbial composition, the anti-microbial composition made by combining a sufficient amount of an ester of formic acid, an oxidizer and water to provide from about 0.01 to about 10.0 wt. % of the ester of formic acid, from about 0.01 to about 10.0 wt. % of the oxidizer, from about 0.001 to about 5.0 wt. % of performic acid, and up to about 99.98 wt. % of water; and wherein the anti-microbial composition is diluted from about 1:1 to about 1:12 with water.
Claim 19
Independent Claim
97 words
A method of sterilizing a filter module comprising contacting the filter module with an anti-microbial composition, the anti-microbial composition made by combining a sufficient amount of an ester of formic acid, an oxidizer and water to provide from about 0.01 to about 10.0 wt. % of the ester of formic acid, from about 0.01 to about 10.0 wt. % of the oxidizer, from about 0.001 to about 5.0 wt. % of performic acid, and up to about 99.98 wt. % of water; and wherein the anti-microbial composition is diluted from about 1:1 to about 1:12 with water.
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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) | 2001-11-23 | 2002-05-25 | 2002-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-23 | 2006-05-25 | 2006-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-23 | 2010-05-25 | 2010-11-24 | $7700.00 | Window Closed / Lapsed |