A federal judge yesterday upheld the $68.4 million verdict awarded to LePage’s Inc. in its antitrust suit against office supply giant 3M, but threw out LePage’s claim for “attempted maintenance of monopoly power” after finding that no such cause of action exists under the Sherman Act.

In April 1999, a jury found that 3M used its monopoly power to drive LePage’s out of the market for transparent tape, but cleared 3M on claims that it had engaged in exclusive dealing or unreasonably restrained trade.