Wetness indicator free from halogen-containing species
US12245922B2 · kind B2 · utility
0Cited by
16References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 12, 2020 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Jul 15, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2300/802
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hot melt wetness indicator comprising an adhesive base composition utilizing a halogen-free species, namely nitrazine yellow, to trigger color change in hygiene articles, such as disposable diapers, to serve as moisture or wetness indicator upon insult. In some embodiments of the invention, the wetness indicator turns from yellow to purple.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.