Patent · US Expired

Transdermal therapeutic system with acetylsalicylic acid in crystalline form as active substance

US5716636A · kind A · utility

16Cited by

5References

11Claims

0Family size

Assignee

LTS Lohmann Therapie-Systeme AG · DE

Inventors

Michael Horstmann · Neuwied, DE
Gerd Hoffmann · Bruchköbel, DE
Heinrich Kindel · Rengsdorf, DE

Key dates

Filing date	Jul 15, 1996
Grant date	Feb 10, 1998
Priority date	—
Expiry date	Jul 15, 2016

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61P29/00
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Transdermal therapeutic system comprising the active substance acetylsalicylic acid, having a layered structure consisting of a backing layer which is substantially impermeable to active substances and moisture and one or several active substance-containing matrix layers, which is characterized in that at least one of said matrix layers comprises acetylsalicylic acid in mainly crystalline form.

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