Cap for a hermetically sealed container
US6373786B1 · kind B1 · utility
53Cited by
22References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D79/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a cap for a hermetically sealed container, said cap providing a visually observable indication of elapsed time from the opening of the seal of said container, said cap including means for releasing a chemical which effects a color change in a chamber formed therein, said chamber being provided with a transparent section for viewing the contents thereof and said released chemical effecting a cumulative color change of said section with time, the arrangement being such that manipulation of said cap to open said container and said seal effects activation of said releasing means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.