Method of fabricating and devices employing vents
US8758488B1 · kind B1 · utility
4Cited by
18References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1999 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Mar 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F5/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Vents for containers include a perforated substrate portion (20) of polymer material over which is thermally bonded a gas permeable membrane (30). The thermal bond (31) is direct and adhesive-free so that there is no adhesive available for chemical attachment by materials within the containers (58) and no opportunity for an adhesive to interfere with or block perforations through the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.