text: Westinghouse continued its manufacturing and research at the plant after the war. In 1964, Westinghouse was issued a permit from United States Atomic Energy Commission to conduct research using thorium and uranium to produce thorium-tungsten wire. In 1983, Westinghouse sold its lamp manufacturing operation to North American Phillips Lighting Corporation. The manufacturing of thorium-tungsten wire was continued at the plant until 1984. In 1986, North American Phillips Lighting Corporation returned the control of the plant back to Westinghouse.