08/17/2011 07:09 EDT | Updated 10/17/2011 05:12 EDT

Facebook appears poised to seek dismissal of upstate NY man's lawsuit claiming part ownership

BUFFALO, N.Y. - Facebook attorneys appear poised to ask a judge to throw out a western New York man's lawsuit claiming ownership in the social network after finding what they say is proof the case is baseless.

Lawyers for Palo Alto, California-based Facebook and its founder, Mark Zuckerberg, are due in federal court in Buffalo Wednesday opposite attorneys for Paul Ceglia, who says he's got a 2003 contract making him half owner of Facebook.

Facebook says that contract's a fake — a doctored version of an actual document their experts found on Ceglia's computer from when the two men worked together on an unrelated project.

Ceglia's attorneys aren't commenting.