Product and method of forming successive layers of face-to-face adjacent media with calculated pore size
US7398887B2 · kind B2 · utility
12Cited by
11References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2004 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Dec 12, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2509/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter media product and method of making the same wherein at least two independent filter media thicknesses of differing coarse and fine pore sizes are held in face-to-face relationship with the pore sizes being so calculated that the overall average pore size of successive thicknesses is smaller than the pore size of the finest fiber thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.