On October 11, 1938, Games Slayter received U.S. Patent No. 2,133,235, on a Method and Apparatus for Making Glass Wool:

Slayter was the driving force behind the development of fiber glass for Owens-Illinois. A few years later Dale Kleist, a researcher working under Slayter, discovered an improvement to the process when he accidently blasted the fiber with air, which after some refinement resulted in U.S. Patent No. 2,121,802: