US5194261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaper rash treatment
Assignee: Individual
•
Filing: 1992-05-04
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Granted: 1993-03-16
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Expires: 2012-05-04
Abstract
Abstract An improved method of treating diaper rash in both infants and adults is described. The method entails coating the affected area with a composition containing a copolymer of a lower alkyl vinyl ether and maleic acid, or a derivative of the copolymer.
Inventors
- 👤 Virgil Pichierri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:42
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61K; A61K31/00; A61K31/74; A61K31/765; A61L15/42; A61L15/46; A61L2300/00; A61L2300/20; A61L2300/21; A61L2300/40; A61L2300/412; A61L2300/428; A61L2300/442; A61L2300/452; A61L2300/80; A61L2300/802
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
194 words
A method of treating a diaper rash which comprises: applying to an area of diaper rash a composition comprising about 10 to about 40% by weight of a copolymer of an alkyl vinyl ether, having about 1 to 3 carbon atoms in the alkyl group, and maleic acid, wherein about 20% to about 90% of acid groups of the maleic acid are reacted to convert them to a group selected from the group consisting of a metal salt and an alkyl ester having about 2 to 6 carbon atoms, the copolymer being dispersed in a topically-acceptable carrier, the copolymer capable of reacting with waste by-products during use to become partially hydrated to thereby adhere to the skin and to form a barrier against diaper rash causative and irritant agents; over-coating the composition with a layer consisting essentially of semi-solid ointment; wherein when the copolymer becomes partially hydrated the over-coat layer prevents the composition from substantially adhering to a diaper surface; and removing and reapplying the over-coat layer during successive diaper changes while allowing the composition underlying said layer to remain essentially undistributed throughout said successive diaper changes to thereby enable the skin to heal.
Claim 2
Independent Claim
194 words
A method of treating a diaper rash which comprises: applying to an area of diaper rash a composition comprising about 10 to about 40% by weight of a copolymer of an alkyl vinyl ether, having about 1 to 3 carbon atoms in the alkyl group, and maleic acid, wherein about 20% to about 90% of acid groups of the maleic acid are reacted to convert them to a group selected from the group consisting of a metal salt and an alkyl ester having about 2 to 6 carbon atoms, the copolymer being dispersed in a topically-acceptable carrier, the copolymer capable of reacting with waste by-products during use to become partially hydrated to thereby adhere to the skin and to form a barrier against diaper rash causative and irritant agents; over-coating the composition with a layer consisting essentially of semi-solid ointment; wherein when the copolymer becomes partially hydrated the over-coat layer prevents the composition from substantially adhering to a diaper surface; and removing and reapplying the over-coat layer during successive diaper changes while allowing the composition underlying said layer to remain essentially undistributed throughout said successive diaper changes to thereby enable the skin to heal.
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein the copolymer composition is removed after about one day and reapplied if healing is not complete.
Claim 4
Dependent Claim
31 words
The method of claim 1, wherein about 70 to 90% of the acid groups are converted to metal salts selected from the group consisting essentially of calcium, sodium, and mixtures thereof.
Claim 5
Dependent Claim
37 words
The method of claim 1, wherein about 30 to 45% of the acid groups are converted to alkyl esters wherein the alkyl group is selected from the group consisting of propyl, isopropyl, butyl, isobutyl, and mixtures thereof.
Claim 6
Dependent Claim
22 words
The method of claim 1, wherein the topically-acceptable carrier is selected from the group consisting essentially of petrolatum, white petrolatum, and lanolin.
Claim 7
Dependent Claim
21 words
The method of claim 1, wherein the over-coat layer is selected from the group consisting of petrolatum, white petrolatum, and lanolin.
Claim 8
Dependent Claim
29 words
The method of claim 1, wherein the composition further contains at least one additive selected from the group consisting of oils, emollients, fillers, vitamins, astringents, coloring agents, and odorants.
Claim 9
Dependent Claim
20 words
The method of claim 1, wherein the composition comprises about 20 to about 35% of the copolymer and derivatives thereof.
Claim 10
Dependent Claim
10 words
The method of claim 1, wherein the composition is alcohol-free.
Claim 11
Independent Claim
148 words
A method of treating a diaper rash which comprises the steps of: applying to an area of diaper rash a composition comprising about 10 to about 40% by weight of a calcium, sodium partial mixed salt of a copolymer of vinyl methyl ether and maleic acid dispersed in a topically-acceptable carrier, the copolymer capable of reacting with waste by-products during use to become partially hydrated to thereby adhere to the skin and to form a barrier against diaper rash causative and irritant agents; over-coating the composition with a layer consisting essentially of semi-solid ointment; wherein when the copolymer becomes partially hydrated the over-coat layer prevents the composition from substantially adhering to a diaper surface; and removing and reapplying the over-coat layer during successive diaper changes while allowing the composition underlying said layer to remain essentially undistributed throughout said successive diaper changes to thereby enable the skin to heal.
Claim 12
Independent Claim
148 words
A method of treating a diaper rash which comprises the steps of: applying to an area of diaper rash a composition comprising about 10 to about 40% by weight of a calcium, sodium partial mixed salt of a copolymer of vinyl methyl ether and maleic acid dispersed in a topically-acceptable carrier, the copolymer capable of reacting with waste by-products during use to become partially hydrated to thereby adhere to the skin and to form a barrier against diaper rash causative and irritant agents; over-coating the composition with a layer consisting essentially of semi-solid ointment; wherein when the copolymer becomes partially hydrated the over-coat layer prevents the composition from substantially adhering to a diaper surface; and removing and reapplying the over-coat layer during successive diaper changes while allowing the composition underlying said layer to remain essentially undistributed throughout said successive diaper changes to thereby enable the skin to heal.
Claim 13
Dependent Claim
75 words
A composition suitable for use in treating a diaper rash, comprising: about 30.75% of a calcium, sodium partial mixed salt of a copolymer of vinyl methyl ether and maleic acid; about 15.4% of cellulose gum; about 5% of mineral oil; and a petrolatum base; wherein the copolymer reacts with waste by-products during use to become partially hydrated to thereby adhere to the skin and to form a barrier against diaper rash causative and irritant agents.
Claim 14
Dependent Claim
75 words
A composition suitable for use in treating a diaper rash, comprising: about 30.75% of a calcium, sodium partial mixed salt of a copolymer of vinyl methyl ether and maleic acid; about 15.4% of cellulose gum; about 5% of mineral oil; and a petrolatum base; wherein the copolymer reacts with waste by-products during use to become partially hydrated to thereby adhere to the skin and to form a barrier against diaper rash causative and irritant agents.
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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) | 1996-03-15 | 1996-09-14 | 1997-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-15 | 2000-09-14 | 2001-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-15 | 2004-09-14 | 2005-03-16 | $7700.00 | Window Closed / Lapsed |