Patterson opened a Service Center in Charleston, West Virginia as a warehouse to stock spare parts. Heyl & Patterson's North Side manufacturing plant closed in 1970, and was eventually sold to Schneider, Inc., a pipe and sheet metal fabricator. At least two of the buildings still stand, occupied by a furniture warehouse and a bus garage. The Florida Operations Division saw a decline in profits in the 1970s, following the end of the NASA Apollo Program. Attempts were made to expand the scope of its business through maintenance and construction work at the U.S. Navy's Caribbean bases, non-naval construction among the islands and Central America and construction on Merritt Island and at local power plants. It served as the field headquarters for projects in Guantanamo Bay Naval Base in Cuba, the Panama Canal Zone and the Bahamas, but was eventually sold off in 1980. As recently as 2006, a Heyl & Patterson sign still stood on the property. In 1985, Heyl & Patterson acquired Edw. Renneburg & Sons Co. of Baltimore, Maryland, a leading designer and manufacturer of energy-saving process equipment since 1874. Renneburg & Sons merged with Heyl & Patterson's Process Division to become the Renneburg Division, and the acquisition broadened Heyl & Patterson's scope of fluid bed equipment and rotary dryers, and enabled it to manufacture equipment to process chemicals, pharmaceuticals, fertilizer, metals, fish meal and food. A pilot plant testing lab facility was built in a different Greentree location, similar to one run by Renneburg, to support the new product lines. 21st Century By the start of the 21st century, Heyl & Patterson entered its third century of business, and was now located in the Southpointe business park in nearby Canonsburg, Pennsylvania. In 2007, the company moved to the Pittsburgh suburb of Robinson Township and then to closer to Pittsburgh, in Carnegie, PA, for its final years. The company still designs and manufactures barge unloaders, rail car dumpers, ship unloaders and other material transfer equipment, as well as engineering services and environmental processing equipment, including dryers, coolers and mixers. The company has partners and representatives all over the world, including Mexico, Argentina, Brazil, Chile, India, South Korea and Australia. As of 2010, five of the top six coal-fired power plants in the world rely on equipment from Heyl & Patterson. In 2012, Heyl & Patterson celebrated its 125th anniversary in business. On May 6, 2016, Heyl &