Patent · US Expired

Transdermal therapeutic system exhibiting an increased active substance flow and process for the production thereof

US5230898A · kind A · utility

62Cited by

7References

13Claims

0Family size

Assignee

LTS Lohmann Therapie-Systeme GmbH Co. KG · DE

Inventors

Michael Horstmann · Neuwied, DE
Fritz Herrmann · Rodgau, DE

Key dates

Filing date	Mar 28, 1990
Grant date	Jul 27, 1993
Priority date	—
Expiry date	Mar 28, 2010

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K9/7084
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A transdermal therapeutic system exhibiting layered structure consists of a backing layer which is impermeable to active substances, a matrix having water-insoluble basic material and islands (inclusions) divided therein, and a layer controlling the access of cutaneous liquid by means of which the matrix is activatable. Process for the production are described.

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