US4435180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric active agent delivery system and method of use
Assignee: Alza Corp
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Filing: 1982-05-25
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Granted: 1984-03-06
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Expires: 2002-05-25
Abstract
Abstract A transdermal therapeutic system is formed from a body member surrounding means at least a portion of which is an active agent loaded elastomer which is in a stretched condition during use. The tension created by the stretching of the elastomer is preferably from 20 to 35 psi and maintains the agent transferring contact between the skin and the transdermal therapeutic system. The transdermal therapeutic system may be in the form of a glove, sock, sleeve, cuff or band, for example.
Inventors
- 👤 Harold M. Leeper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:18
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/70; A61K9/7023; A61K9/703; A61K9/7038; A61K9/7046; A61K9/7053; A61K9/7076; A61M; A61M35/00; Y; Y10; Y10S; Y10S2/00; Y10S2/901
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
A transdermal therapeutic system for delivering active agent to the skin comprising body member surrounding means, at least a portion of said means being formed from an elastomeric matrix having active agent dispersed therethrough at a concentration greater than the saturation concentration of said agent in said elastomer, the skin proximal surface area of said matrix being smaller in its relaxed condition than in its condition of use when applied around a body member whereby the elastomeric matrix creates a compressive force on said body member sufficient to establish and maintain active agent transferring contact between said transdermal therapeutic system and the skin of said body member.
Claim 2
Dependent Claim
107 words
A transdermal therapeutic system for delivering active agent to the skin comprising body member surrounding means, at least a portion of said means being formed from an elastomeric matrix having active agent dispersed therethrough at a concentration greater than the saturation concentration of said agent in said elastomer, the skin proximal surface area of said matrix being smaller in its relaxed condition than in its condition of use when applied around a body member whereby the elastomeric matrix creates a compressive force on said body member sufficient to establish and maintain active agent transferring contact between said transdermal therapeutic system and the skin of said body member.
Claim 3
Dependent Claim
15 words
The transdermal therapeutic system of claim 1 wherein said elastomer matrix surrounds said body member.
Claim 4
Dependent Claim
26 words
The transdermal therapeutic system of claim 1 wherein said elastomer matrix comprises material selected from the group consisting of natural rubbers, synthetic elastomers and mixtures thereof.
Claim 5
Dependent Claim
51 words
The transdermal therapeutic system of claim 3 wherein said synthetic elastomers are selected from the group consisting of polybutadiene, polyisoprene, polyisobutylene, polyurethane, ethylene/propylene, ethylene/propylene/diene, polyester, polychloroprene, chlorinated polyethylene, polyepichlorohydrin, and silicone rubbers; copolymers of vinyl acetate and ethylene, alkyl acrylates and ethylene, butadiene and styrene, butadiene and acrylonitrile and mixtures thereof.
Claim 6
Dependent Claim
32 words
The transdermal therapeutic system of claim 2 wherein the elongation of said matrix from its relaxed condition to its condition of use produces a stress of from about 10 to 50 psi.
Claim 7
Dependent Claim
16 words
The transdermal therapeutic system of claim 5 wherein said stress is from 20 to 35 psi.
Claim 8
Dependent Claim
23 words
The transdermal therapeutic system of claim 5 or 6 wherein said elastomeric exhibits a relatively low stress decay within the range of elongation.
Claim 9
Dependent Claim
28 words
The transdermal therapeutic system of claim 1 wherein the skin proximal surface of said elastomer matrix is provided with means for controlling rate of release of said agent.
Claim 10
Dependent Claim
16 words
The therapeutic system of claim 1 wherein said structure is in the form of a sock.
Claim 11
Dependent Claim
17 words
The elastomeric member of claim 1 wherein the elastomer is in the form of a tubular sheath.
Claim 12
Dependent Claim
16 words
The elastomeric member of claim 1 wherein the member is in the form of a glove.
Claim 13
Independent Claim
90 words
A method for delivering active agent to the skin which comprises applying around a body member an active agent delivery device, at least a portion of which is an elastomeric element, loaded with an active agent at a concentration above the saturation concentration of said agent in said elastomeric element and maintaining said elastomeric element in contact with the skin and in tension during the period of active agent delivery whereby the stress produced by said elastomeric element provides active agent transferring contact between the skin and the elastomeric element.
Claim 14
Independent Claim
90 words
A method for delivering active agent to the skin which comprises applying around a body member an active agent delivery device, at least a portion of which is an elastomeric element, loaded with an active agent at a concentration above the saturation concentration of said agent in said elastomeric element and maintaining said elastomeric element in contact with the skin and in tension during the period of active agent delivery whereby the stress produced by said elastomeric element provides active agent transferring contact between the skin and the elastomeric element.
Claim 15
Dependent Claim
21 words
The method of claim 12 wherein the stress in the elastomer is in the range of from 10 to 50 psi.
Claim 16
Dependent Claim
16 words
The method of claim 13 wherein the stress is in the range of from 20-35 psi.
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |