Visual vacuum indicator
US9242782B2 · kind B2 · utility
0Cited by
118References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2008 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Feb 15, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2543/00972
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A packaging system for roast and ground coffee is disclosed. The packaging system can comprise a container, an overcap, and a visual indicator. The visual indicator can indicate a pressure difference between the inside of the packaging system and the outside of the packaging system by moving from a concave outwardly position to a concave inwardly position. The visual indicator can comprise a bubble.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.