VINTAGE CorningWare A - 4 - B Blue Cornflower 4 - Qt. Oven Casserole W/PYREX Glass Lid
Item History & Price
Authentic Vintage CorningWare "A-04-B" Cornflower Blue 4-Qt Oven Casserole with PYREX 10"x10" Square "A-12-C" + "33-B" Clear Glass LidExcellent pre-owned condition!From the early 1990’s as determined by the block stamp under handle.No chips or cracks. I have other Vintage CorningWare listed and will combine shipping if buying more than one. Please wait to pay until I send a revised invoice with combinedPlease see photos.CorningWare was originally a brand name for a unique glass-ceram...ic (Pyroceram) cookware resistant to thermal shock. It was first introduced in 1958 by Corning Glass Works, Corning, New York in the United States.In 1915, Corning Glass Works, Corning, NY, introduced the first glass ovenware, Pyrex, made of a new, clear, heat-resistant material. In 1952, quite by accident, Dr. S. Donald Stookey of Corning’s research and development division, invented Pyroceram, a white ceramic-like material capable of withstanding enormous variations in temperature. While he was testing a type of glass plate used in early TV production, a Furnace’s temperature control malfunctioned causing the glass to be heated to 900 degrees C. It should have melted, but it didn’t. Instead it kept its edges and turned a milky white color! When Dr. Stookey took the hot, undamaged glass out of the furnace with his tongs, he accidentally dropped it on the floor. To his amazement, it didn’t break! He quickly named and patented the new glass as Pyroceram. It was first used in industrial and military applications.
