Oxygen detection system for a solid article
US6689438B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jun 6, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24851
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Novel articles and packages are disclosed. Disclosed is the non-invasive use of a luminescent compound to detect and measure concentrations of oxygen dissolved in solids, particularly polymeric materials present in multi-layered packaging materials. The measurement is made independent of the oxygen concentration of the surrounding atmosphere. The invention is especially useful as a quality assurance check to verify oxygen scavenger activation during the assembly of modified atmosphere and vacuum packages. A solid article includes a film including an oxygen barrier layer; and a layer including an oxygen scavenger; and a patch including an oxygen barrier; and an oxygen indicator including a luminescent compound; wherein the patch is adhered to the film; and wherein the oxygen indicator is disposed between the oxygen barrier of the patch, and the oxygen barrier of the film. A package, and a bottle, each having the oxygen indicator, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.