Composite filter media with multiple fiber structures including nanofibers
US12290772B2 · kind B2 · utility
1Cited by
26References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 30, 2019 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Jun 16, 2040 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter media comprises a first fiber layer and a second fiber layer positioned downstream of the first fiber layer. The first fiber layer has a first geometric mean fiber diameter of less than 1 μm such that the geometric standard deviation of fiber diameter is greater than 2. The second fiber layer has a second geometric mean fiber diameter of less than 1 μm such that the geometric standard deviation of fiber diameter is less than 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.