WO2008148964A3 - Indicator indicating that a temperature threshold has been crossed - Google Patents
Indicator indicating that a temperature threshold has been crossed Download PDFInfo
- 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
Links
- 150000001875 compounds Chemical class 0.000 abstract 4
- 230000007704 transition Effects 0.000 abstract 3
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 230000002441 reversible effect Effects 0.000 abstract 1
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.
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 | ||
| FR0756814A FR2919721B1 (en) | 2007-07-30 | 2007-07-30 | CROSSING INDICATOR WITH TEMPERATURE THRESHOLD |
| FR0756814 | 2007-07-30 |
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 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 (6)
| 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 |
Citations (3)
| 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 |
-
2007
- 2007-07-30 FR FR0756814A patent/FR2919721B1/en active Active
-
2008
- 2008-04-21 WO PCT/FR2008/050716 patent/WO2008148964A2/en active Application Filing
Patent Citations (3)
| 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 |
|---|---|
| WO2008148964A2 (en) | 2008-12-11 |
| FR2919721A1 (en) | 2009-02-06 |
| FR2919721B1 (en) | 2017-05-19 |
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