US5231975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasound-enhanced delivery of materials into and through the skin
Assignee: Janssen Pharmaceuticals Inc
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Filing: 1992-03-02
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Granted: 1993-08-03
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Expires: 2012-03-02
Abstract
Abstract A method for enhancing the permeability of the skin or other biological membrane to a material such as a drug is disclosed. In the method, the drug is delivered in conjunction with ultrasound having a frequency of above about 10 MHz. The method may also be used in conjunction with chemical permeation enhancers and/or with iontophoresis.
Inventors
- 👤 Durairaj Bommannan
- 👤 Hirohisa Okuyama
- 👤 Richard H. Guy
- 👤 Paul Stauffer
- 👤 Gordon L. Flynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
A; A61; A61M; A61M37/00; A61M37/0092; A61K; A61K9/00; A61K9/0002; A61K9/0009; A61N; A61N7/00; A61B; A61B10/00; A61B10/0045; A61B10/02; A61B17/00; A61B2017/00743; A61B2017/00747; A61B2017/00765; A61M2037/0007; A61N1/00; A61N1/18; A61N1/20; A61N1/30
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
71 words
A method for increasing the permeability of the stratum corneum comprising the steps of: (a) applying to an area of the stratum corneum a material which allows for the transmission of ultrasound; and (b) applying ultrasound to the material wherein the ultrasound applied has a frequency of above 10 MHz and is applied at an intensity and for a period of time effective to increase the permeability of the stratum corneum.
Claim 2
Independent Claim
71 words
A method for increasing the permeability of the stratum corneum comprising the steps of: (a) applying to an area of the stratum corneum a material which allows for the transmission of ultrasound; and (b) applying ultrasound to the material wherein the ultrasound applied has a frequency of above 10 MHz and is applied at an intensity and for a period of time effective to increase the permeability of the stratum corneum.
Claim 3
Dependent Claim
20 words
The method of claim 1, wherein said ultrasound frequency is in the range of about 15 MHz to 50 MHz.
Claim 4
Dependent Claim
19 words
The method of claim 2, wherein said ultrasound frequency is in the range of about 15 to 25 MHz.
Claim 5
Dependent Claim
20 words
The method of claim 1, wherein said period of time is in the range of about 5 to 45 minutes.
Claim 6
Dependent Claim
20 words
The method of claim 4, wherein said period of time is in the range of about 5 to 30 minutes.
Claim 7
Dependent Claim
16 words
The method of claim 1, wherein said period of time is less than about 10 minutes.
Claim 8
Dependent Claim
19 words
The method of claim 1, wherein said intensity of said ultrasound is less than about 5.0 W/cm 2 .
Claim 9
Dependent Claim
23 words
The method of claim 7, wherein said intensity of said ultrasound is in the range of about 0.01 to 5.0 W/cm 2 .
Claim 10
Dependent Claim
23 words
The method of claim 8, wherein said intensity of said ultrasound is in the range of about 0.05 to 3.0 W/cm 2 .
Claim 11
Dependent Claim
24 words
The method of claim 1, wherein said area of the stratum corneum is in the range of about 1 to 100 cm 2 .
Claim 12
Dependent Claim
24 words
The method of claim 10, wherein said area of the stratum corneum is in the range of about 5 to 100 cm 2 .
Claim 13
Dependent Claim
24 words
The method of claim 11, wherein said area of the stratum corneum is in the range of about 10 to 50 cm 2 .
Claim 14
Dependent Claim
20 words
The method of claim 1 wherein material which allows for the transmission of ultrasound is a polymer or a gel.
Claim 15
Dependent Claim
21 words
The method of claim 13 wherein said material which allows for the transmission of ultrasound further comprises a chemical permeation enhancer.
Claim 16
Dependent Claim
27 words
The method of claim 1 wherein said material which allows for the transmission of ultrasound is selected from the group consisting of glycerin, water, and propylene glycol.
Claim 17
Dependent Claim
15 words
The method of claim 1, wherein steps (a) and (b) are carried out approximately simultaneously.
Claim 18
Dependent Claim
14 words
The method of claim 1, wherein step (b) is carried out before step (a).
Claim 19
Dependent Claim
14 words
The method of claim 1, wherein step (a) is carried out before step (b).
Claim 20
Dependent Claim
11 words
The method of claim 1, wherein the ultrasound is applied continuously.
Claim 21
Dependent Claim
10 words
The method of claim 1, wherein the ultrasound is pulsed.
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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) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |