# US 2014/0155845 A1 · Application aid

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- Number: US 2014/0155845 A1
- Document ID: US20140155845A1
- Status: Published application
- Kind: A1
- Application number: 14/236,415
- Filed: 2012-08-03
- Published: 2014-06-05
- Earliest claimed: 2011-08-03
- Assignees: Acino AG
- Inventors: Manuela Aigle; Björn Schurad; Holger Piotrowski
- Web page: https://patentgrep.com/patent/US20140155845A1

## CPC

- A61K 9/7084: {Transdermal patches having a drug layer or reservoir, and one or more separate drug-free skin-adhesive layers, e.g. between drug reservoir and skin, or surrounding the drug reservoir; Liquid-filled reservoir patches}
- A61K 9/703: {characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches}
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)

## Abstract

The invention relates to a transdermal therapeutic system (10) comprising an active ingredient depot (11) that contains at least one active ingredient, comprising an application face which is designed for applying on a skin and which is adhesive on at least some parts of the surface, and comprising a protective film (14) which covers the application face and which comprises a first protective film part (14a) and a second protective film part (14b). The first protective film part (14a) differs from the second protective film part (14b) in terms of physical properties.

## Claims

### Claim 1

Transdermal therapeutic system having
an active ingredient depot containing at least one active ingredient,
an application face which is designed for application to a skin and is adhesive on at least some parts of the surface, and
a protective film that covers the application face and comprises a first protective film part and a second protective film part,
wherein the first protective film part differs in terms of its physical properties from the second protective film part.

### Claim 2 (depends on 1)

The transdermal therapeutic system according to claim 1, wherein the different physical properties include different surface tensions of the first and second protective film parts on respective sides of the first and second protective film parts facing the application face.

### Claim 3 (depends on 1)

The transdermal therapeutic system according to claim 1, wherein the different physical properties include different thicknesses of the first and second protective film parts.

### Claim 4 (depends on 1)

The transdermal therapeutic system according to claim 1, wherein the different physical properties include different stiffnesses of the first and second protective film parts.

### Claim 5 (depends on 1)

The transdermal therapeutic system according to claim 1, wherein the different physical properties include different surface structures of the first and second protective film parts on at least sides facing the application face.

### Claim 6 (depends on 5)

The transdermal therapeutic system according to claim 5, wherein the surface structure of at least one of the first and second protective film parts is formed by an embossed structure.

### Claim 7 (depends on 1)

The transdermal therapeutic system according to claim 1, wherein the first protective film part is formed from a different material than the second protective film part.

### Claim 8 (depends on 1)

The transdermal therapeutic system according to claim 1, wherein the first protective film part, the second protective film part, or both, have a coating on a side facing the application face.

### Claim 9 (depends on 1)

The transdermal therapeutic system according to claim 1, wherein the first and second protective film parts differ from one another in the coloration thereof.