Product and method of forming a gradient density fibrous filter
US7896941B2 · kind B2 · utility
31Cited by
26References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Jul 10, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter media product and method of making the same wherein at least two filter media thicknesses of differing average coarse and fine fiber sizes are held in intertangled relationship forming a gradient density fibrous filter media with the fiber sizes having an overall average in successive thicknesses being either greater or less than the average fiber size of the intertangled fiber thickness(es).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.