US Patent Issued to THERMOGRAPHIC MEASUREMENTS on Dec. 16 for "Colour change composition and compounds" (British, French Inventors)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,558, issued on Dec. 16, was assigned to THERMOGRAPHIC MEASUREMENTS LTD (Honiton, Great Britain).

"Colour change composition and compounds" was invented by Bagavant Shivkumar (South Wirrel, Great Britain), Uma Shivkumar (South Wirrel, Great Britain) and Philippe Marrec (Lannion, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a colour change composition containing an electron donating organic colouring compound, an electron accepting compound and a compound of formula (I): wherein E is an ester linkage O-CO or -CO2, R is independently selected from an optionally substituted linear or branched alkyl group, alkenyl cycloalk...