US4151275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized iodine tincture
Assignee: West Labs Inc
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Filing: 1977-10-11
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Granted: 1979-04-24
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Expires: 1997-10-11
Abstract
Abstract An improved iodine tincture is provided by incorporating therein a small amount, preferably about 0.25 to 2.5 parts, per part by weight of iodine, of povidone, 1-vinyl-2-pyrrolidone polymer. In these proportions , the povidone modified tincture of iodine exhibits markedly reduced tendency to burn or sensitize skin areas on which it dries, is stable, and at the same time retains the essential germicidal activity of unmodified tincture of iodine. The new products can be formulated directly, or as concentrates yielding the improved tincture upon extension with a prescribed amount of aqueous-ethanolic diluent.
Inventors
- 👤 Abraham Cantor
- 👤 Murray W. Winicov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:56
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/18; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
63 words
A povidone modified iodine tincture comprising an aqueous ethanolic solution containing per 100 ml 1.8-2.2 grams of iodine, 2.1 to 2.6 grams of sodium iodide, an amount of povidone within the range of 0.25 to 2.5 parts per part by weight of iodine, and the amount of ethanol in said aqueous ethanolic solution being 25-95% V/V of the solvents of said modified tincture.
Claim 2
Dependent Claim
63 words
A povidone modified iodine tincture comprising an aqueous ethanolic solution containing per 100 ml 1.8-2.2 grams of iodine, 2.1 to 2.6 grams of sodium iodide, an amount of povidone within the range of 0.25 to 2.5 parts per part by weight of iodine, and the amount of ethanol in said aqueous ethanolic solution being 25-95% V/V of the solvents of said modified tincture.
Claim 3
Dependent Claim
24 words
A povidone modified iodine tincture as defined in claim 1 wherein the amount of ethanol in said solution is 44-50% of said modified tincture.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |