ALEXANDRIA, Va., March 12 -- United States Patent no. 12,245,922, issued on March 11, was assigned to Bostik Inc. (Wauwatosa, Wis.).
"Wetness indicator free from halogen-containing species" was invented by Kimberly E. Secrist (Wauwatosa, Wis.) and Neil G. Janetski (Milwaukee).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hot melt wetness indicator comprising an adhesive base composition utilizing a halogen-free species, namely nitrazine yellow, to trigger color change in hygiene articles, such as disposable diapers, to serve as moisture or wetness indicator upon insult. In some embodiments of the invention, the wetness indicator turns from yellow to purple."
The patent was filed on March 12, 2020, under A...