Patent US5589507A successfully refreshed from Google Patents.
US5589507A
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US
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Method for sterilizing medical devices utilizing a room temperature sterilant
Assignee: Minntech Corp
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Filing: 1995-11-17
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Granted: 1996-12-31
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Expires: 2015-11-17
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. Also provided is a method for sterilizing devices by contacting the surface of the device with the anti-microbial composition containing the ester of formic acid, an oxidizer, performic acid and water.
Inventors
- 👤 II Robert T. Hall
- 👤 Bradley K. Onstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:53
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/18; A01; A01N; A01N37/00; A01N37/02; A01N37/16; A61L2/186
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
92 words
A method of sterilizing a medical device comprising contacting a surface to be sterilized of the medical device with an anti-microbial composition having improved anti-corrosive properties, wherein the anti-microbial composition is made by combining sufficient amount of an ester of formic acid, an oxidizer and water to provide about 0.01 to about 10 wt. % of the ester of formic acid, from about 0.01 to about 10 wt. % of the oxidizer, from about 0.001 to about 5 wt. % of performic acid, and up to about 99.98 wt. % of water.
Claim 2
Independent Claim
92 words
A method of sterilizing a medical device comprising contacting a surface to be sterilized of the medical device with an anti-microbial composition having improved anti-corrosive properties, wherein the anti-microbial composition is made by combining sufficient amount of an ester of formic acid, an oxidizer and water to provide about 0.01 to about 10 wt. % of the ester of formic acid, from about 0.01 to about 10 wt. % of the oxidizer, from about 0.001 to about 5 wt. % of performic acid, and up to about 99.98 wt. % of water.
Claim 3
Dependent Claim
28 words
A method 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
12 words
A method according to claim 1, wherein the oxidizer is hydrogen peroxide.
Claim 5
Dependent Claim
13 words
A method according to claim 1, wherein the oxidizer is urea hydrogen peroxide.
Claim 6
Dependent Claim
26 words
A method according to claim 1, wherein the anti-microbial composition further comprises an additive selected from the group consisting of corrosion inhibitors, stabilizers, and mixtures thereof.
Claim 7
Dependent Claim
145 words
A method according to claim 5, wherein the additive comprises: (a) about 20% to about 45% by weight mono sodium salt of phosphoric acid and mono (2-ethyl hexyl) ester of phosphoric acid; (b) about 20% to about 30% by weight pyrophosphonic acid, bis (2-ethyl hexyl) esters of pyrophosphonic acid, and sodium salts of pyrophosphonic acid; (c) about 10% to about 25% by weight polyphosphonic acids, (2-ethyl hexyl) esters of polyphosphonic acids, and sodium salts of polyphosphonic acids; (d) about 20% to 25% by weight water; (e) less than 10% by weight phosphoric acid, bis (2-ethyl hexyl) esters of phosphoric acid, sodium salt of bis (2-ethyl hexyl) esters of phosphoric acid, and sodium salt of phosphoric acid; (f) less than 3% by weight 2-ethyl hexanol; and (g) less than 5% by weight phosphoric acid, mono sodium salt of phosphoric acid, and disodium salt of phosphoric acid.
Claim 8
Dependent Claim
11 words
A method according to claim 5, wherein the additive comprises 1,2,3-Benzotriazole.
Claim 9
Dependent Claim
12 words
A method according to claim 2, wherein the ester is ethyl formate.
Claim 10
Dependent Claim
12 words
A method according to claim 2, wherein the oxidizer is hydrogen peroxide.
Claim 11
Dependent Claim
18 words
A method according to claim 2, wherein the ester is ethyl formate and the oxidizer is hydrogen peroxide.
Claim 12
Independent Claim
87 words
A method of reprocessing a catheter comprising contacting a surface of the catheter with an anti-microbial composition having improved anti-corrosive properties, wherein the anti-microbial composition is made by combining sufficient amount of an ester of formic acid, an oxidizer and water to provide about 0.01 to about 10 wt. % of the ester of formic acid, from about 0.01 to about 10 wt. % of the oxidizer, from about 0.001 to about 5 wt. % of performic acid, and up to about 99.98 wt. % of water.
Claim 13
Independent Claim
87 words
A method of reprocessing a catheter comprising contacting a surface of the catheter with an anti-microbial composition having improved anti-corrosive properties, wherein the anti-microbial composition is made by combining sufficient amount of an ester of formic acid, an oxidizer and water to provide about 0.01 to about 10 wt. % of the ester of formic acid, from about 0.01 to about 10 wt. % of the oxidizer, from about 0.001 to about 5 wt. % of performic acid, and up to about 99.98 wt. % of water.
Claim 14
Dependent Claim
28 words
A method according to claim 11, wherein the ester of formic acid is selected from the group consisting of ethyl formate, methyl formate, propyl formate, and mixtures thereof.
Claim 15
Dependent Claim
12 words
A method according to claim 11, wherein the oxidizer is hydrogen peroxide.
Claim 16
Dependent Claim
13 words
A method according to claim 11, wherein the oxidizer is urea hydrogen peroxide.
Claim 17
Dependent Claim
26 words
A method according to claim 11, wherein the anti-microbial composition further comprises an additive selected from the group consisting of corrosion inhibitors, stabilizers, and mixtures thereof.
Claim 18
Dependent Claim
145 words
A method according to claim 15, wherein the additive comprises: (a) about 20% to about 45% by weight mono sodium salt of phosphoric acid and mono (2-ethyl hexyl) ester of phosphoric acid; (b) about 20% to about 30% by weight pyrophosphonic acid, bis (2-ethyl hexyl) esters of pyrophosphonic acid, and sodium salts of pyrophosphonic acid; (c) about 10% to about 25% by weight polyphosphonic acids, (2-ethyl hexyl) esters of polyphosphonic acids, and sodium salts of polyphosphonic acids; (d) about 20% to 25% by weight water; (e) less than 10% by weight phosphoric acid, bis (2-ethyl hexyl) esters of phosphoric acid, sodium salt of bis (2-ethyl hexyl) esters of phosphoric acid, and sodium salt of phosphoric acid; (f) less than 3% by weight 2-ethyl hexanol; and (g) less than 5% by weight phosphoric acid, mono sodium salt of phosphoric acid, and disodium salt of phosphoric acid.
Claim 19
Dependent Claim
11 words
A method according to claim 15, wherein the additive comprises 1,2,3-Benzotriazole.
Claim 20
Dependent Claim
12 words
A method according to claim 12, wherein the ester is ethyl formate.
Claim 21
Dependent Claim
12 words
A method according to claim 12, wherein the oxidizer is hydrogen peroxide.
Claim 22
Dependent Claim
18 words
A method according to claim 12, wherein the ester is ethyl formate and the oxidizer is hydrogen peroxide.
Claim 23
Independent Claim
102 words
A method of reprocessing a catheter comprising contacting a surface of the catheter with an anti-microbial composition having improved anti-corrosive properties, wherein the anti-microbial composition is made by combining sufficient amount of an ester of formic acid selected from the group consisting of ethyl formate, methyl formate, propyl formate and mixtures thereof, an oxidizer and water to provide about 0.01 to about 10 wt. % of said ester of formic acid, from about 0.01 to about 10 wt. % of the oxidizer, from about 0.001 to about 5 wt. % of performic acid, and up to about 99.98 wt. % of water.
Claim 24
Independent Claim
102 words
A method of reprocessing a catheter comprising contacting a surface of the catheter with an anti-microbial composition having improved anti-corrosive properties, wherein the anti-microbial composition is made by combining sufficient amount of an ester of formic acid selected from the group consisting of ethyl formate, methyl formate, propyl formate and mixtures thereof, an oxidizer and water to provide about 0.01 to about 10 wt. % of said ester of formic acid, from about 0.01 to about 10 wt. % of the oxidizer, from about 0.001 to about 5 wt. % of performic acid, and up to about 99.98 wt. % of water.
Claim 25
Dependent Claim
12 words
A method according to claim 21, wherein the oxidizer is hydrogen peroxide.
Claim 26
Dependent Claim
13 words
A method according to claim 21, wherein the oxidizer is urea hydrogen peroxide.
Claim 27
Dependent Claim
26 words
A method according to claim 21, wherein the anti-microbial composition further comprises an additive selected from the group consisting of corrosion inhibitors, stabilizers, and mixtures thereof.
Claim 28
Dependent Claim
145 words
A method according to claim 24, wherein the additive comprises: (a) about 20% to about 45% by weight mono sodium salt of phosphoric acid and mono (2-ethyl hexyl) ester of phosphoric acid; (b) about 20% to about 30% by weight pyrophosphonic acid, bis (2-ethyl hexyl) esters of pyrophosphonic acid, and sodium salts of pyrophosphonic acid; (c) about 10% to about 25% by weight polyphosphonic acids, (2-ethyl hexyl) esters of polyphosphonic acids, and sodium salts of polyphosphonic acids; (d) about 20% to 25% by weight water; (e) less than 10% by weight phosphoric acid, bis (2-ethyl hexyl) esters of phosphoric acid, sodium salt of bis (2-ethyl hexyl) esters of phosphoric acid, and sodium salt of phosphoric acid; (f) less than 3% by weight 2-ethyl hexanol; and (g) less than 5% by weight phosphoric acid, mono sodium salt of phosphoric acid, and disodium salt of phosphoric acid.
Claim 29
Dependent Claim
11 words
A method according to claim 24, wherein the additive comprises 1,2,3-Benzotriazole.
Claim 30
Dependent Claim
12 words
A method according to claim 21, wherein the ester is ethyl formate.
Claim 31
Dependent Claim
18 words
A method according to claim 21, wherein the ester is ethyl formate and the oxidizer is hydrogen peroxide.
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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) | 1999-12-31 | 2000-07-01 | 2000-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-31 | 2004-07-01 | 2004-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-31 | 2008-07-01 | 2008-12-31 | $7700.00 | Window Closed / Lapsed |