Patent · US Expired

Substrate for packaging perishable goods or for application onto same and method for determining the quality of said goods

US7081364B1 · kind B1 · utility

11Cited by

5References

24Claims

0Family size

Inventors

Dietrich Haarer · Bayreuth, DE
Yoav Eichen · Haifa, IL

Key dates

Filing date	Jan 27, 1999
Grant date	Jul 25, 2006
Priority date	—
Expiry date	Jan 27, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01K3/04
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a substrate for packaging of or for attachment to products which are sensitive to aging and temperature, having a planar time-temperature integrator comprising a matrix and at least one reversible indicator embedded therein, which has photochromic properties on the basis of transfix reactions, arranged in the region of the substrate.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.