ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,144, issued on Oct. 28, was assigned to Mitsubishi Hitec Paper Europe GmbH (Bielefeld, Germany).
"Heat-sensitive recording material comprising phenol-free organic colour developers" was invented by Nora Wilke (Flensburg, Germany) and Claas Boxhammer (Herford, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A description is given of a heat-sensitive recording material, comprising phenol-free organic color developers, more particularly comprising a color developer mixture comprising phenol-free organic color developers, of a heat-sensitive recording layer and also of a coating composition for producing it, of the use of the heat-sensitive recor...