ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,296, issued on March 17, was assigned to Tyco Fire Products LP (Cranston, R.I.).
"Antifreeze for fire sprinkler systems" was invented by Sean E. Cutting (West Warwick, R.I.), Manuel R. Silva Jr. (Cranston, R.I.), Barbara L. Churchill (Pawtucket, R.I.) and Krista N. Brouwer (Cranston, R.I.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Antifreezes, which include glycerol or a mixture of alkylene glycol and glycerol, water and an organic acid salt, are provided. Exemplary antifreezes include at least about 45 vol. % water, greater than 48 to about 55 vol. % glycerol, 0.1 to 1.75 wt. % of a salt of an organic acid having one or more carboxylic acid gr...