The lawyers said in a legal brief they plan to file their motion to dismiss by Friday.
One of the women, Tamara Green, a California lawyer who says Cosby drugged and sexually assaulted her in the 1970s, originally brought the lawsuit in December 2014. Two women from Florida later joined the suit: Therese Serignese says Cosby drugged and raped her in 1976, and Linda Traitz alleges he tried to drug her and then sexually groped her in 1970.