Eisai Sues To Protect Popular Alzheimer's Treatment
The lawsuit was filed in federal court in New Jersey by Eisai Co. Ltd. and its U.S. subsidiary Eisai Inc. against Mutual Pharmaceutical Co. Ltd. and United Research Laboratories Inc.
At issue is U.S. Patent No. 4,895,841—which covers compounds used for the treatment of senile dementia, including donepezil hydrochloride, Aricept’s active ingredient. The ‘841 patent, which was issued in January 1990, is owned by Eisai...
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