Westlake Hospital in Melrose Park has filed for bankruptcy, months after its new owners attempted to close the hospital only to be stopped by a court order. Westlake filed for Chapter 7 bankruptcy, which usually leads to liquidation, in U.S. Bankruptcy Court in Delaware on Tuesday. In its bankruptcy filing, Westlake listed assets of $1 million to $10 million, and liabilities of $10 million to $50 million.