1
Makoto Asano, Iwao Chiba, Masumi Iemura: Temperature control indicator unit. Mitsui Toatsu Chemicals, Fisher Christen & Sabol, March 8, 1988: US04729671 (19 worldwide citation)

This invention relates to a temperature control indicator unit comprising a substrate having supported thereon (a) microcapsules enclosing a hydrophobic organic compound possessing an arbitrarily selected melting point, (b) a methine dye and (c) an oxidizing material. More particularly, a unit made ...


2
Tsutsumi Haruki, Hirayama Nobuhiro, Asano Makoto, Yamaguchi Takamine, Akahori Hiroyuki: Coloring-time controlling layer.. Mitsui Toatsu Chemicals, December 3, 1986: EP0203776-A2 (3 worldwide citation)

Disclosed herein is a coloring-time controlling layer suitable for use in a temperature-control indicator unit. The coloring-time controlling layer is composed of a film obtained by drying an emulsion of a polymer containing styrene and/or acrylonitrile as constituent unit(s) and interposed between ...