Eisai files patent infringement suit against Mutual Pharmaceutical, United Research Laboratories

By Lisa Kerner

Charlotte, N.C., Aug. 4 - Eisai Co., Ltd. and Eisai Inc. filed a lawsuit against Mutual Pharmaceutical Co., Ltd. and United Research Laboratories, Inc. following the companies' submission of an abbreviated New Drug Application to the Food and Drug Administration for Aricept ODT Orally Disintegrating Tablets (donepezil hydrochloride).

The action was filed in the U.S. District Court for the District of New Jersey in Newark.

Eisai said it believes its donepezil composition patent is valid until its expiration date of Nov. 25, 2010, according to a company news release.

Eisai Co. is a Tokyo-based pharmaceutical company.

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