HAYWARD, Calif.--(BUSINESS WIRE)--IMPAX Laboratories, Inc. today announced that Warner Chilcott Laboratories Ireland Limited, Warner Chilcott Company, Inc., Warner Chilcott (US) LLC, and Mayne Pharma International PTY. LTD have filed suit for patent infringement in the United States District Court for the District of New Jersey based on the Company’s submission of Abbreviated New Drug Application (“ANDA”) for doxycycline hyclate delayed-release tablets (75 and 100 mg), generic of Doryx®, to the Food and Drug Administration. In connection with this ANDA, IMPAX provided notice that its submission includes a Paragraph IV certification stating the Company believes its product does not infringe U.S. Patent No. 6,958,161, or the patent is invalid or unenforceable.
