births
March 31, 1921
John Ugelstad, Norwegian chemical engineer and inventor (died 1997)
John Ugelstad
John Ugelstad was a Norwegian chemical engineer and inventor, known for discovering a process to manufacture monodisperse micropellets or microbeads and dynabeads. He was a professor at the Norwegian Institute of Technology and consultant for DuPont.
March 31
March 31 is the 90th day of the year in the Gregorian calendar; 275 days remain until the end of the year.