US Patent Issued to PPG Industries Ohio on June 17 for "Polyester polymer and polyester-based heat resistant coating for cookware or bakeware" (American, Canadian Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,158, issued on June 17, was assigned to PPG Industries Ohio Inc. (Cleveland).

"Polyester polymer and polyester-based heat resistant coating for cookware or bakeware" was invented by Peter R. Jepson (Exton, Pa.), Thomas J. Bate (Glenview, Ill.) and David Daffern (Toronto).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polyester polymer is polymerized from an alcohol component including a diol and a polyol and an acid component including terephthalic acid and isophthalic acid, with the terephthalic acid and isophthalic acid present in a desired molar ratio. The polyester polymer also includes carboxylic acid functional groups, a weight average molecu...