Single or multi-ply filter medium for air filtration and a filter element made therefrom
US6315805A · kind A · utility
56Cited by
11References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Apr 27, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2260/028
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dual- or multi-layer filter medium for air filtration, having at least one meltblown layer (2, 2a and 5) at least one meltblown layer (2 and 2a) is placed on the inlet side of the filter medium. The meltblown layer has a pore size larger than that of the next following layer or layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.