WILMINGTON, Del. - US Bank National Association on Dec. 3 filed an adversary complaint in the U.S. Bankruptcy Court for the District of Delaware seeking declaratory relief against a creditor of bankrupt energy company Evergreen Solar Inc., contending that certain patents that were part of an asset purchase agreement (APA) belong to the bank (US Bank National Association v. Max Era Properties $(In Re: Evergreen Solar Inc.$), No. 11-12590, Chapter 11. D. Del. Bkcy.).