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US4946673A Expired / Lapsed US ⏱️ 0.0 years remaining

Iodine-containing germicidal preparations and method of controlling germicidal activity

Assignee: Euro Celtique SA
•
Filing: 1989-01-23
•
Granted: 1990-08-07
•
Expires: 2009-01-23
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Abstract

Abstract Iodine-containing germicidal preparations are provided with assured control of the content of equilibrium iodine in aqueous solution to be between 1 and 20 ppm, preferably 2-15 ppm so as to provide predetermined germicidal activity. The invention further comprises the determination of the content of equilibrium iodine in an aqueous iodophor solution by subjecting such solution to several extractions with different amounts of a water immiscible solvent for iodine, determining the concentrations of the equilibrium iodine in each of the amounts of the water immiscible solvent and extrapolating the concentration to a theoretical zero value which is a measure of the equilibrium iodine in the aqueous iodophor solution. The invention further comprises improved germicidal iodophor compositions comprising an iodophor, citric acid and iodate.

Inventors

  • 👤 William Pollack
  • 👤 Oliver Iny

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 13:55
CPC Classifications
A; A01; A01N; A01N59/00; A01N59/12

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 41 words
Germicidal composition, said composition comprising an aqueous solution of povidone-iodine with the concentration of between about 4 and 10 ppm equilibrium iodine and an iodate compound in solution, the ratio of iodine to iodate compound being between about 2:1 and 1:1.
Claim 2
Dependent Claim 41 words
Germicidal composition, said composition comprising an aqueous solution of povidone-iodine with the concentration of between about 4 and 10 ppm equilibrium iodine and an iodate compound in solution, the ratio of iodine to iodate compound being between about 2:1 and 1:1.
Claim 3
Dependent Claim 11 words
Composition according to claim 1 further comprising citric acid in solution.
Claim 4
Dependent Claim 45 words
Method of effecting improved germicidal activity, which comprises applying a solution of an iodate compound to a site requiring germicidal action, and then applying an iodophor solution to said site, the prior application of the iodate solution increasing the germicidal action of the iodophor solution.
Claim 5
Dependent Claim 45 words
Method of effecting improved germicidal activity, which comprises applying a solution of an iodate compound to a site requiring germicidal action, and then applying an iodophor solution to said site, the prior application of the iodate solution increasing the germicidal action of the iodophor solution.
Claim 6
Dependent Claim 62 words
Method of effecting improved germicidal activity, which comprises applying to a site requiring germicidal action, an aqueous solution to povidone-iodine containing between about 4 and 10 ppm equilibrium iodine in contact at said site with an iodate compound, the ratio of iodine to iodate compound being between about 2:1 and 1:1, said iodate compound increasing the germicidal action of the povidone-iodine solution.
Claim 7
Dependent Claim 62 words
Method of effecting improved germicidal activity, which comprises applying to a site requiring germicidal action, an aqueous solution to povidone-iodine containing between about 4 and 10 ppm equilibrium iodine in contact at said site with an iodate compound, the ratio of iodine to iodate compound being between about 2:1 and 1:1, said iodate compound increasing the germicidal action of the povidone-iodine solution.

References Cited (Backward Citations)

US3355386A Cited
US4148884A Cited
US4045364A Cited
DE2718385A1 Cited
US4113857A Cited
US4271149A Cited
US4271149B1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-08-06 1994-02-05 1994-08-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-08-06 1998-02-05 1998-08-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-08-06 2002-02-05 2002-08-07 $7700.00 Window Closed / Lapsed

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