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:
Apr. 18, 2017
Filed:
Feb. 26, 2013
SK Chemicals Co., Ltd., Gyeonggi-do, KR;
Jong-Seob Im, Gyeonggi-do, KR;
Yong-Youn Hwang, Gyeonggi-do, KR;
Won-No Youn, Seoul, KR;
Yeo-Jin Park, Seoul, KR;
Hye-Min Kim, Gyeonggi-do, KR;
Joon-Gyo Oh, Gyeonggi-do, KR;
Hun-Taek Kim, Seoul, KR;
Bong-Yong Lee, Seoul, KR;
SK Chemicals Co., Ltd., Seongnam-si, Gyeonggi-do, KR;
Abstract
Provided is a transdermal delivery system (for example, in the form of a patch) having a double-layer structure including a drug-containing matrix layer and an adhesive layer, wherein the drug-containing matrix layer is obtained by completely dissolving donepezil using a certain polymer and then formulating along with an adhesive; and a process for preparing the same. The transdermal delivery system according to the present invention does not show any crystallization of donepezil in the formulation, can release donepezil at a uniform rate for a long time, and can inhibit the release dumping phenomenon that occurs in a transdermal delivery system having a single-layer structure.