December 2, 2019. Thompson Falls, Montana. United States Antimony Corporation (“USAC”, NYSE American “UAMY) reported that hydraulic, mechanical, and electrical testing of the Puerto Blanco mill in Guanajuato has been successfully completed. The laboratory is nearing completion, and reagents are being ordered to start the leach testing of gold and silver. John Gustavsen from Montana and Heriberto Torres are heading up the pilot project.