Device for dispensing liquid from a sterile packaging bottle
US11116694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2016 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Jun 17, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a device for dispensing an aqueous liquid through an interface membrane made partially hydrophilic and partially hydrophobic, made so that when in operation, during each operation of dispensing a metered amount of liquid, the streams of air and liquid flow alternately in a capillary channel (18) downstream from the membrane. Said interface membrane (7) is made of a filtering material which includes biocidal metal cations in the body thereof. Said device comprises a porous insert (8), which is permeable both to liquid and to air, which is arranged upstream from the membrane in the path of the fluids and which is made of a material including sites with negative charges capable of attracting biocidal metal cations from said membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.