The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2022
Filed:
Nov. 21, 2018
Hitachi, Ltd., Tokyo, JP;
Shigetaka Tsubouchi, Tokyo, JP;
Kohhei Aida, Tokyo, JP;
Shunsuke Mori, Tokyo, JP;
Masahiro Kawasaki, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention addresses the problem of providing a temperature detection label capable of preventing falsification using a simple structure. To solve this problem, the present invention provides a temperature detection label that is characterized by comprising a supporting member and a temperature detection part provided on the supporting member and in that: the temperature detection part has a temperature detection material that, in a heating process, starts color development at temperature Tand starts losing color as a result of melting at temperature Tand, in a cooling process, solidifies while remaining colorless by being cooled to temperature Tor lower; the temperature detection material includes a leuco dye, decolorizer, and developer; and the temperature detection label also comprises a member having an appearance that changes between Tand T, inclusive, or a high-melting-point material having a melting point or glass transition temperature higher than T.