ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,357, issued on May 13, was assigned to Thermographic Measurements Ltd (Devon, Great Britain).
"Temperature-sensitive indicator" was invented by Bagavant Shivkumar (Merseyside, Great Britain) and Philippe Marrec (Lannion, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A temperature-indicator product comprising a visual indicator comprising a thermochromic colour-memory composition and comprising an electron-donating colouring organic compound (A), an electron-accepting colouring organic compound (B) and reaction medium compound (C). The visual indicator comprises a first portion comprising a first thermochromic colour-change composition in its...