- Patent Title: Temperature traceable indicator and method for manufacturing same
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Application No.: US15554105Application Date: 2016-01-29
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Publication No.: US10677660B2Publication Date: 2020-06-09
- Inventor: Toyotaka Yuasa , Hiroyuki Kagawa , Hiroshi Sasaki , Kenichi Souma
- Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
- Applicant Address: JP Tokyo
- Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Crowell & Moring LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@66a0229b
- International Application: PCT/JP2016/052557 WO 20160129
- International Announcement: WO2016/157977 WO 20161006
- Main IPC: G01K11/16
- IPC: G01K11/16 ; G01K11/06 ; G09F3/02 ; C09K3/00 ; C09D11/50

Abstract:
The purpose of the present invention is to provide a temperature traceable indicator capable not only of displaying temperature history, but also adding other additional information. To that end, a temperature traceable indicator according to the present invention is provided with a base material and a temperature indicating laminate disposed on the base material, and is characterized in that the temperature indicating laminate is provided with a coloring layer including a color former, a color developing layer including a color developer for inducing the coloration of the color former, and a barrier layer disposed between the coloring layer and color developing layer, and the barrier layer includes a barrier agent that is immiscible with the color developer, is frozen at a first temperature, and melts beyond a second temperature so as to allow the color developer to become diffused in the coloring layer so that color is produced.
Public/Granted literature
- US20180045582A1 Temperature Traceable Indicator and Method for Manufacturing Same Public/Granted day:2018-02-15
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