Bessie Littleton, the wife of the Jessie Littleton who was an engineer at Corning, was the one that influenced the conception of Pyrex® brand.
After going through multiple experiences with broken dishes that were damaged after only one use in the oven. She asked her husband for glass samples from his laboratory so that she could try and make a Savoy cake with it. It was an immediate success! After experimenting with all sorts of recipes (side dishes like potatoes or even meat dishes) her success finally convinced Corning to launch themselves in creating kitchen utensils.
The only thing that was missing was a name, at first, they thought of “Pyright” since the first sample was a pie plate. But they immediately changed their mind and finally called it Pyrex® in order to make it rhyme with Nonex.
Soon after, many advertisers were eager to promote this revolutionary glass which resisted to cold and high temperatures, and most of the American households were rapidly equipped with Pyrex® transparent roasters and casseroles.
The first pie dish came out of the Pyrex® factory (Bake & Enjoy)