Wetness indicator having varied hues
US8911681B2 · kind B2 · utility
8Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2011 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Apr 28, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/525
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wetness indicator material may be used on a substrate to form a wetness sensor. The sensor may show either the presence or absence of an aqueous-based fluid or water-containing medium, such as vaginal fluid or urine in a personal hygiene article. The wetness sensor may be incorporated into the article. The wetness indicator material includes a standard colorant that does not change color when wetted. The standard colorant increases the range of hues exhibited by the wetness indicator material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.