Package for enclosing food
US7785894B2 · kind B2 · utility
7Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2004 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Mar 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An indicator that reacts with at least one gaseous compound in such a way that the color of the indicator is changed. The indicator is a layer formed on a substrate and including metallic silver and/or metallic copper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.