Patent · US Expired

Absorbing agents and cover layer which is impermeable to active substances and which contains channel-formers or removable protective layer of a transdermal therapeutic system

US7220473B2 · kind B2 · utility

11Cited by

1References

8Claims

0Family size

Assignee

Hexal AG · DE

Inventors

Cornelia Beier · Holzkirchen, DE
Ralf Kibele · Bruckmühl, DE

Key dates

Filing date	Dec 5, 2001
Grant date	May 22, 2007
Priority date	—
Expiry date	May 18, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/254
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

This present invention concerns a cover layer that is impermeable to the active substances and/or a removable protective layer of a transdermal therapeutic system, comprising a thermoplastic film which either directly contains the absorbing agents and channel-forming agents or is coated with a polymer support (thermoplast) containing these substances. The polymer support can either be applied over the entire surface of the film or in patterns, directly during production. The thermoplastic film that is used and the polymer support can be made from either the same or different materials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.