ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,798, issued on Sept. 30, was assigned to Nippon Kayaku K.K. (Tokyo).
"Heat-sensitive recording composition" was invented by Yousuke Toda (Fukuyama, Japan), Kousuke Shibagaki (Fukuyama, Japan) and Kyohei Miyanaga (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a heat-sensitive recording material which has improved thermal responsiveness and improved stability of the print part and the background in comparison to conventional heat-sensitive recording materials that contain a non-phenolic compound as a color developer. The present invention provides a heat-sensitive recording composition which contains a color form...