Thermal transfer of active ink with dynamic environmental data
US11426974B2 · kind B2 · utility
0Cited by
3References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2019 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Apr 30, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/502
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A thermal transfer ribbon includes a carrier layer, a release layer, and a thermally transferable ink layer. The ink layer includes an active ink having a chemistry that is configured, responsive to the occurrence of an environmental, physical or biological condition, to undergo a chemical or physical state change causing a change in the color state of the active ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.