The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1999
Filed:
Aug. 14, 1998
Applicant:
Inventors:
Assignee:
LTS Lohmann Therapie-Systeme GmbH & Co. KG, Neuwied, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61L / ; A61F / ;
U.S. Cl.
CPC ...
424447 ; 424449 ;
Abstract
This invention relates to a process for the production of a transdermal therapeutic system containing the active substance 17-.beta.-estradiol and optionally further active substances having a laminated structure positioned on a backing layer which is essentially impermeable to active substance and moisture, one or more matrix layers and optionally an adhesive layer, characterized in that at least one of the matrix layers or the adhesive layer contains anhydrous 17-.beta.-estradiol in crystalline form.