Useful life indicators
US7892487B2 · kind B2 · utility
6Cited by
12References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2006 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Dec 22, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/122
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A useful life indicator is provided to display an indication of the remaining useful life of an associated product such as an impregnated substrate of an air treatment chemical dispenser. The cue is preferably a well having a volatile indicator material positioned therein. The well's cavity is configured to achieve clumping of the remaining indicator material as some volatizes due to capillary attraction. This presents a shrinking display that can be coordinated with the level of use of the air treatment chemical dispenser. The cue may also be used in connection with monitoring other products such as perishable products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.