
Chemist
Colleyville
Ralph Howard Rygg (* 8. March 1927 in Grand Forks; † 14. August 2020 in Frisco) was a chemist. He was 93 years old. His education included Concordia College and University of Iowa. He worked at University of Nevada, Reno, Mobil and Minnesota State University, Mankato. He was buried at Colleyville.