BUFFALO (AP) - Lawyers for Facebook are expected in federal court in Buffalo, where a New York man has filed a lawsuit claiming part ownership of the social network site.

Paul Ceglia of Wellsville is suing Facebook based on a 2003 contract he says he signed with Facebook founder Mark Zuckerberg. Ceglia claims the contract to develop software and a Web site that eventually became Facebook entitles him to 84 percent ownership.

Facebook attorneys, in court filings, question why Ceglia waited seven years to come forward and said his claim is "outlandish."

A state Supreme Court justice earlier this month signed a temporary restraining order preventing Facebook from transferring assets. The case has since moved to federal court, where Facebook will argue against the order Tuesday.