William A. Mitchell was a key inventor for what?

Dr. William A. "Bill" Mitchell (October 21, 1911 – July 26, 2004) was an American food chemist who, while working for General Foods Corporation between 1941 and 1976, was the key inventor behind Pop Rocks, Tang, quick-set Jell-O, Cool Whip, and powdered egg whites.

He was born in Raymond, Minnesota. Mitchell graduated with a Master's degree in Chemistry from the University of Nebraska. Mitchell got a research job at an Agricultural Experiment Station in Lincoln, Nebraska. A lab accident there left him with second- and third-degree burns over most of his body. He joined General Foods in 1941. His first major success came with a tapioca substitute he helped develop during World War II, in response to the disruption of cassava supplies. Because of this, tapioca quickly became known as "Mitchell mud" within the US WW II infantry.

During his career he received over 70 patents.