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WO2008148964A3 - Indicator indicating that a temperature threshold has been crossed - Google Patents

Indicator indicating that a temperature threshold has been crossed Download PDF

Info

Publication number
WO2008148964A3
WO2008148964A3 PCT/FR2008/050716 FR2008050716W WO2008148964A3 WO 2008148964 A3 WO2008148964 A3 WO 2008148964A3 FR 2008050716 W FR2008050716 W FR 2008050716W WO 2008148964 A3 WO2008148964 A3 WO 2008148964A3
Authority
WO
WIPO (PCT)
Prior art keywords
state
temperature
crossed
compound
colourless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/FR2008/050716
Other languages
French (fr)
Other versions
WO2008148964A2 (en
Inventor
Renaud Vaillant
Catherine Bonaiti-Fleurie
Frederic Chaput
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cryolog SA
Original Assignee
Cryolog SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cryolog SA filed Critical Cryolog SA
Publication of WO2008148964A2 publication Critical patent/WO2008148964A2/en
Publication of WO2008148964A3 publication Critical patent/WO2008148964A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

The invention relates to a temperature crossing indicator making it possible to establish whether a product, particularly a perishable product, has crossed a threshold temperature value, in an increasing or decreasing direction manner, the indicator comprising: a first reversible thermochromic compound (A) having, depending on the temperature and its history of variations, either a coloured state (IU) or a colourless or slightly coloured state (U), the transition from one state to the other occurring at two distinct temperatures depending on whether the temperature varies in an increasing or decreasing manner, a second thermochromic compound (B) having, depending on the temperature and its history of variations, either a coloured state (HB) or a colourless or slightly coloured state (IB), the second compound being such that its transition to the coloured state (HB) compensates for the transition to the colourless state (U) of the first compound.
PCT/FR2008/050716 2007-04-19 2008-04-21 Indicator indicating that a temperature threshold has been crossed Ceased WO2008148964A2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US91277007P 2007-04-19 2007-04-19
US60/912,770 2007-04-19
US91606107P 2007-05-04 2007-05-04
US60/916,061 2007-05-04
FR0756814 2007-07-30
FR0756814A FR2919721B1 (en) 2007-07-30 2007-07-30 CROSSING INDICATOR WITH TEMPERATURE THRESHOLD

Publications (2)

Publication Number Publication Date
WO2008148964A2 WO2008148964A2 (en) 2008-12-11
WO2008148964A3 true WO2008148964A3 (en) 2009-03-12

Family

ID=39110722

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2008/050716 Ceased WO2008148964A2 (en) 2007-04-19 2008-04-21 Indicator indicating that a temperature threshold has been crossed

Country Status (2)

Country Link
FR (1) FR2919721B1 (en)
WO (1) WO2008148964A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2986324A1 (en) * 2012-01-30 2013-08-02 Gem Innov RESPECT INDICATOR OF A TEMPERATURE RANGE
GB201318872D0 (en) * 2013-10-25 2013-12-11 Rolls Royce Plc Temperature indicator
DE102014226204A1 (en) * 2014-12-17 2016-06-23 Siemens Aktiengesellschaft A method and apparatus for monitoring a device for internal state changes
WO2018194639A1 (en) 2017-04-21 2018-10-25 Hewlett-Packard Development Company, L.P. Electronic device housings
JP6866318B2 (en) * 2018-01-22 2021-04-28 株式会社日立製作所 Temperature detection label and article management system using it
JP7136604B2 (en) * 2018-06-27 2022-09-13 セイコーインスツル株式会社 temperature sensing device
CN113205743A (en) * 2021-04-15 2021-08-03 中山大学 Patterned bidirectional irreversible temperature tag based on spin cross material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373338A (en) * 2001-02-02 2002-09-18 B & H Liquid Crystal Devices Temperature indicator
JP2004149726A (en) * 2002-10-31 2004-05-27 Pilot Ink Co Ltd Polychromatic and color-changing water-based ink composition for writing utensil and ballpoint pen using the composition
US20060166822A1 (en) * 2005-01-27 2006-07-27 The Pilot Ink Co., Ltd. Reversible thermochromic display article

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373338A (en) * 2001-02-02 2002-09-18 B & H Liquid Crystal Devices Temperature indicator
JP2004149726A (en) * 2002-10-31 2004-05-27 Pilot Ink Co Ltd Polychromatic and color-changing water-based ink composition for writing utensil and ballpoint pen using the composition
US20060166822A1 (en) * 2005-01-27 2006-07-27 The Pilot Ink Co., Ltd. Reversible thermochromic display article

Also Published As

Publication number Publication date
FR2919721B1 (en) 2017-05-19
WO2008148964A2 (en) 2008-12-11
FR2919721A1 (en) 2009-02-06

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