Over the years, we have come to expect that in each Congress there will be at least one Miscellaneous Tariff Bill that will provide for special tariff provisions yielding duty refunds to interested parties. In this session of Congress, it was called the Manufacturing Enhancement Act of 2010 (see Pub. L. 111-227). See FrWebGate.access.gpo.gov for details about which goods are affected and how long you have to file your refund claim, even if your entries are already liquidated.