forAlchem LTD, in Grafton, ND to dry Distillers Dried Grains with Solubles (DDGS). 1990 Patent titledHigh turndown rotary dryer flightsissued now owned by TDC. 1991 TDC/Rader sells... system to Heartland Corn Products in Winthrop, MN to dry DDGS. 1995 Patent titledLarge Diameter wafer dryer with adjustable flightingissued now owned by TDC. 1996 Patent titledResilient...Timeline - Thompson Dehydrating Co Search Home Our Company Dryer University Our Products & Services Login Mission Statement Experience Heritage Timeline Our Team Contact Us Dryers...