Patent US603161A successfully refreshed from Google Patents.
USRE36064E
Expired / Lapsed
US
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Disinfection method and composition therefor
Assignee: Ecolab USA Inc
•
Filing: 1993-04-23
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Granted: 1999-01-26
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Expires: 2013-04-23
Abstract
Abstract There is disclosed, in one aspect, chlorous acid generating compositions useful for disinfecting substrates. The compositions comprise aqueous solutions containing a suitable amount of a protic acid, such as citric or malic acid, and a suitable amount of a metal chlorite, such as sodium chlorite. The chlorite ion concentration which is in the form of chlorous acid in the composition is no more than about 15 percent by weight of the total amount of chlorite ion concentration. In a preferred embodiment, the composition also contains a vicinal dihydroxy or polyhydroxy compound. In another preferred embodiment, the composition contains at least a 10-fold molar excess of a water soluble chloride ion compared to the total concentration of chlorite ion. In another aspect, there is disclosed a process for disinfecting substrates. This process comprises applying the compositions described above to a substrate. In yet another aspect, there is disclosed a process for preparing the compositions described above. This process comprises contacting the protic acid with the metal chlorite to form the disinfecting composition.
Inventors
- 👤 Eugene A. Davidson
- 👤 Robert D. Kross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:20
CPC Classifications
A; A01; A01N; A01N59/00
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
101 words
A process for disinfecting a substrate comprising contacting said substrate with an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.2, and wherein the organic acid is not lactic acid, and from about 0.0001% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 2
Dependent Claim
101 words
A process for disinfecting a substrate comprising contacting said substrate with an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.2, and wherein the organic acid is not lactic acid, and from about 0.0001% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the metal chlorite is sodium chlorite.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the organic acid is selected from the group consisting of citric acid, malic acid, tartaric acid, glycolic acid, mandelic acid, salicyclic acid, carbonic acid, and combinations thereof.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the organic acid is citric acid.
Claim 6
Dependent Claim
76 words
A process for disinfecting a substrate comprising contacting said substrate with an aqueous solution consisting essentially of from about 0.01% to about 6% by weight glycolic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 7
Dependent Claim
76 words
A process for disinfecting a substrate comprising contacting said substrate with an aqueous solution consisting essentially of from about 0.01% to about 6% by weight glycolic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 8
Dependent Claim
21 words
The process of claim 5 wherein glycolic acid ranges from about 0.05% to about 3% by weight of the total composition.
Claim 9
Dependent Claim
21 words
The process of claim 5 wherein glycolic acid ranges from about 0.1% to about 2% by weight of the total composition.
Claim 10
Dependent Claim
22 words
The process of claim 5 wherein the metal chlorite ranges from about 0.03% to about 0.3% by weight of the total composition.
Claim 11
Dependent Claim
15 words
The process of any one of claims 5-8 wherein the metal chlorite is sodium chlorite.
Claim 12
Dependent Claim
18 words
The process of claim 1 wherein the substrate is selected from skin, tissue, body fluids and mucous membranes.
Claim 13
Dependent Claim
101 words
A process for disinfecting a substrate comprising contacting said substrate with an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.2, and wherein the organic acid is not lactic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 14
Dependent Claim
101 words
A process for disinfecting a substrate comprising contacting said substrate with an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.2, and wherein the organic acid is not lactic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 15
Dependent Claim
22 words
The process of claim 11 wherein the organic acid ranges from about 0.05% to about 3% by weight of the total composition.
Claim 16
Dependent Claim
22 words
The process of claim 11 wherein the organic acid ranges from about 0.1% to about 2% by weight of the total composition.
Claim 17
Dependent Claim
22 words
The process of claim 11 wherein the metal chlorite ranges from about 0.03% to about 0.3% by weight of the total composition.
Claim 18
Dependent Claim
15 words
The process of any one of claims 11-14 wherein the metal chlorite is sodium chlorite.
Claim 19
Dependent Claim
36 words
The process of any one of claims 11-14 wherein the organic acid is selected from the group consisting of citric acid, malic acid, tartaric acid, glycolic acid, mandelic acid, salicylic acid, carbonic acid, and combinations thereof.
Claim 20
Dependent Claim
18 words
The process of claim 11 wherein the substrate is selected from skin, tissue, body fluids and mucous membranes.
Claim 21
Dependent Claim
96 words
A chlorous acid generating composition comprising an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.1, and wherein the organic acid is not lactic acid, and from about 0.0001% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% of weight of the total amount of chlorite ion concentration.
Claim 22
Dependent Claim
96 words
A chlorous acid generating composition comprising an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.1, and wherein the organic acid is not lactic acid, and from about 0.0001% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% of weight of the total amount of chlorite ion concentration.
Claim 23
Dependent Claim
12 words
The composition of claim 18 wherein the metal chlorite is sodium chlorite.
Claim 24
Dependent Claim
33 words
The composition of claim 18 wherein the organic acid is selected from the group consisting of citric acid, malic acid, tartaric acid, glycolic acid, mandelic acid, salicylic acid, carbonic acid, and combinations thereof.
Claim 25
Dependent Claim
12 words
The composition of claim 18 wherein the organic acid is citric acid.
Claim 26
Dependent Claim
96 words
A chlorous acid generating composition comprising an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.2, and wherein the organic acid is not lactic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chloride ion concentration.
Claim 27
Dependent Claim
96 words
A chlorous acid generating composition comprising an aqueous solution consisting essentially of from about 0.01% to about 6% by weight of an organic acid, wherein the pK of the organic acid is from about 2.8 to about 4.2, and wherein the organic acid is not lactic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chloride ion concentration.
Claim 28
Dependent Claim
22 words
The composition of claim 22 wherein the organic acid ranges from about 0.05% to about 3% by weight of the total composition.
Claim 29
Dependent Claim
22 words
The composition of claim 22 wherein the organic acid ranges from about 0.1% to about 2% by weight of the total composition.
Claim 30
Dependent Claim
22 words
The composition of claim 22 wherein the metal chlorite ranges from about 0.03% to about 0.3% by weight of the total composition.
Claim 31
Dependent Claim
15 words
The composition of any one of claim 22-25 wherein the metal chlorite is sodium chlorite.
Claim 32
Dependent Claim
36 words
The composition of any one of claim 22-25 wherein the organic acid is selected from the group consisting of citric acid, malic acid, tartaric acid, glycolic acid, mandelic acid, salicyclic acid, carbonic acid, and combinations thereof.
Claim 33
Dependent Claim
71 words
A chlorous acid generating composition comprising an aqueous solution consisting essentially of from about 0.01% to about 6% by weight glycolic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 34
Dependent Claim
71 words
A chlorous acid generating composition comprising an aqueous solution consisting essentially of from about 0.01% to about 6% by weight glycolic acid, and from about 0.01% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration.
Claim 35
Dependent Claim
21 words
The composition of claim 28 wherein glycolic acid ranges from about 0.05% to about 3% by weight of the total composition.
Claim 36
Dependent Claim
21 words
The composition of claim 28 wherein glycolic acid ranges from about 0.1% to about 2% by weight of the total composition.
Claim 37
Dependent Claim
22 words
The composition of claim 28 wherein the metal chlorite ranges from about 0.03% to about 0.3% by weight of the total composition.
Claim 38
Dependent Claim
16 words
The composition of any one of claims 28-31 wherein the metal chloride is sodium chlorite. .Iadd.
Claim 39
Dependent Claim
385 words
A process for disinfecting a substrate comprising contacting said substrate with an aqueous composition consisting essentially of a mixture of from about 0.01% to about 6% based upon the total weight of said composition of a protic acid, wherein the protic acid is not lactic acid, and from about 0.0001% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration..Iaddend..Iadd.34. The process of claim 33 wherein the erotic acid ranges from about 0.05% to about 3% by weight of the total composition..Iaddend..Iadd.35. The process of claim 33 wherein the protic acid ranges from about 0.1% to about 2% by weight of the total composition..Iaddend..Iadd.36. The process of claim 33 wherein the metal chlorite ranges from about 0.01% to about 0.45% by weight of the total composition..Iaddend..Iadd.37. The process of claim 33 wherein the metal chlorite ranges from about 0.03% to about 0.3% by weight of the total composition..Iaddend..Iadd.38. The process of claim 33 wherein the metal chlorite is sodium chlorite..Iaddend..Iadd.39. A chlorous acid generating composition comprising an aqueous composition consisting essentially of a mixture of from about 0.01% to about 6% based upon the total weight of said composition of a protic acid, wherein the protic acid is not lactic acid, and from about 0.0001% to about 0.45% by weight based upon the total weight of said composition of a metal chlorite, such that the chlorite ion concentration in the form of chlorous acid is not more than about 15% by weight of the total amount of chlorite ion concentration..Iaddend..Iadd.40. The composition of claim 39 wherein the protic acid ranges from about 0.05% to about 3% by weight of the total composition..Iaddend..Iadd.41. The composition of claim 39 wherein the protic acid ranges from about 0.1% to about 2% by weight of the total composition..Iaddend..Iadd.42. The composition of claim 39 wherein the metal chlorite ranges from about 0.01% to about 0.45% by weight of the total composition..Iaddend..Iadd.43. The composition of claim 39 wherein the metal chlorite ranges from about 0.03% to about 0.3% by weight of the total composition..Iaddend..Iadd.44. The composition of claim 39 wherein the metal chlorite is sodium chlorite..Iaddend.
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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) | 2002-01-25 | 2002-07-27 | 2003-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-25 | 2006-07-27 | 2007-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-25 | 2010-07-27 | 2011-01-26 | $7700.00 | Window Closed / Lapsed |