The word PYREX is probably a purely arbitrary word which was devised in 1915 as a trade-mark for products manufactured and sold by Corning Glass Works. Pyrex made its public debut in 1915 during World War I, positioned as an American-produced alternative to Duran.Ī Corning executive gave the following account of the etymology of the name “Pyrex”: Corning removed the lead from Nonex, and developed it as a consumer product. Jesse Littleton of Corning discovered the cooking potential of borosilicate glass by giving his wife a casserole dish made from a cut-down Nonex battery jar. Sullivan had learned about Schott’s borosilicate glass as a doctoral student in Leipzig, Germany. In 1908, Eugene Sullivan, Director of Research at Corning Glass Works, developed Nonex, a borosilicate low-expansion glass, to reduce breakage in shock-resistant lantern globes and battery jars. ![]() Schott AG sold the product under the name “Duran.” ![]() It measures 3 5/8″ high x 7.5″ diameter.īorosilicate glass was first made by German chemist and glass technologist Otto Schott, founder of Schott AG in 1893, 22 years before Corning produced the Pyrex brand. Pyrex Spring Blossom Casserole 7.5″ 1.5 Quart #474-B Cinderella in good condition but shows sign of normal wear.
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