The Dupont brand is well known for its production of Lucite, a type of acrylic resin, and Freon, a type of refrigerant. Lucite is a trademarked product of the Dupont company and is used in a variety of applications, including furniture, jewelry, and medical equipment. Freon is a chlorofluorocarbon gas used as a refrigerant in air conditioners and refrigerators. Both Lucite and Freon are widely used in industry and have been produced by Dupont since the 1930s.