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Patent US4208404A successfully refreshed from Google Patents.
US4208404A
Expired / Lapsed
US
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Glutaraldehyde sterilizing compositions
Assignee: Individual
•
Filing: 1978-10-23
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Granted: 1980-06-17
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Expires: 1998-10-23
Abstract
Abstract Aqueous solutions of glutaraldehyde of acid pH value contain dissolved quantities of certain highly ionized salts and have the ability to kill dormant spores at room temperature.
Inventors
- 👤 Stanley M. Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:50
CPC Classifications
A; A01; A01N; A01N35/00; A01N35/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A method of killing dormant spores, which consists of contacting said spores with a sporicidally-effective amount of a liquid sterilizing composition having a pH from about 2 to less than 7 at a temperature of about 15° C. up to the boiling point of the composition, said sterilizing composition consisting of: a solvent selected from water and a mixture of water and a lower alkanol, 0.05 to 10% by weight of glutaraldehyde, and at least 0.01% by weight up to saturation of the composition thereby of at least one highly ionizable neutral salt dissolved in the solvent and selected from the group consisting of lithium, sodium, potassium and ammonium salts of sulphuric acid, hydrochloric acid, nitric acid, citric acid or acetic acid, or mixtures thereof.
Claim 2
Independent Claim
125 words
A method of killing dormant spores, which consists of contacting said spores with a sporicidally-effective amount of a liquid sterilizing composition having a pH from about 2 to less than 7 at a temperature of about 15° C. up to the boiling point of the composition, said sterilizing composition consisting of: a solvent selected from water and a mixture of water and a lower alkanol, 0.05 to 10% by weight of glutaraldehyde, and at least 0.01% by weight up to saturation of the composition thereby of at least one highly ionizable neutral salt dissolved in the solvent and selected from the group consisting of lithium, sodium, potassium and ammonium salts of sulphuric acid, hydrochloric acid, nitric acid, citric acid or acetic acid, or mixtures thereof.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said composition has a pH of 3 to 6.5.
Claim 4
Dependent Claim
15 words
The method of claim 2, wherein said composition has a pH of 4.5 to 5.5.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein said glutaraldehyde concentration is 1 to 2% by weight.
Claim 6
Dependent Claim
15 words
The method of claim 1 effected at a temperature of about 20° to 25° C.
Claim 7
Dependent Claim
17 words
The method of claim 1 wherein said highly ionizable salt concentration is 0.5 to 1% by weight.
Claim 8
Dependent Claim
48 words
The method of claim 1 effected at a temperature of 20° to 25° C. and wherein said composition has a pH of 3 to 6.5, the glutaraldehyde has a concentration of 1 to 2% by weight and the highly ionizable salt concentration is 0.5 to 1% by weight.
Claim 9
Dependent Claim
54 words
The method of claim 7 wherein said at least one highly ionizable salt is selected from the group consisting of sodium chloride, ammonium chloride, lithium chloride, potassium chloride, sodium nitrate, potassium nitrate, sodium sulphate, potassium sulphate, sodium citrate, sodium acetate and mixtures of sodium chloride and sodium nitrate and sodium chloride and potassium nitrate.
Claim 10
Dependent Claim
22 words
The method of claim 7 wherein said at least one highly-ionizable salt is sodium chloride and said pH is 4.5 to 5.5.
Claim 11
Dependent Claim
30 words
The method of claim 1 including diluting a concentrated form of sterilizing composition containing solvent, glutaraldehyde and salt with solvent to provide said sterilizing composition for utilization in said method.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |