Patent · US Active

Dye-based time indicating label without initial gray time

US9958836B2 · kind B2 · utility

1Cited by
10References
13Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 11, 2016
Grant dateMay 1, 2018
Priority date—
Expiry dateNov 25, 2036

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG09F3/0291
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A dye-based, multilayer time-indicating label without initial gray time comprises a multilayer first part and a multilayer second part. The first part comprises a topsheet in contact with an enhancement layer and an optional reference layer, and the enhancement layer is in contact with a timing layer. The second part comprises a dye layer, an optional dark layer, and a substrate layer. The timing layer and the dye layer are separate from one another, and are optionally protected by one or more release liners. To activate the indicator, the timing and dye layers are separated from the one or more release liners and then joined to one another.

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