Oxygen indicator for packaging
US4526752A · kind A · utility
97Cited by
17References
21Claims
0Family size
Inventors
Key dates
| Filing date | Dec 16, 1982 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Dec 16, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/207497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tamper-resistant package containing in an anerobic environment a leuco dye free of reducing agent which dye becomes colored upon reaction with oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.