Back to results
US 9,011,794 B2Granted
Time temperature indicator
AssigneeFreshpoint Quality Assurance Ltd.
InventorsDietrich Haarer, Tal Gueta-Neyroud, Husein Salman
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFreshpoint Quality Assurance Ltd.
InventorsDietrich Haarer, Tal Gueta-Neyroud, Husein Salman
Estimating the term…
The present invention is generally in the field of measuring and indicating techniques and relates to a time-temperature indicator and methods of manufacturing and use thereof. More specifically, the time-temperature indicator comprises a time temperature indicator comprising at least one metal layer or metal containing layer and in direct contact to the metal layer or to the metal containing layer at least one doped polymer layer, wherein the dopant is an acid, a base or a salt or a photolatent acid or a photolatent base which dopant is added to the polymer, and/or at least one polymer layer wherein a polymer is functionalized with acidic or latent acidic or basic or latent basic groups; or a time temperature indicator comprising at least one polymer layer containing metal particles and a photolatent acid or a photolatent base, or at least one polymer layer containing metal particles wherein the polymer is functionalized with latent acidic or latent basic groups.
A time temperature indicator comprising at least one metal layer or metal containing layer and in contact to the metal layer or to the metal containing layer at least one doped polymer layer, wherein said at least one doped polymer layer is an adhesive and wherein said at least one doped polymer layer etches the metal layer or the metal containing layer, wherein an extent of etching of the metal layer or to the metal containing layer indicates elapsed time and temperature, wherein the dopant comprises phosphoric acid, which dopant is added to the polymer.
Dependencies are inferred from the claim text.