Molded filter element that contains thermally bonded staple fibers and electrically-charged microfibers
US6827764B2 · kind B2 · utility
54Cited by
36References
54Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jul 31, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/692
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter element that comprises a porous molded web 10′ that contains thermally bonded staple fibers 12 and non-thermally bonded electrically charged microfibers 14. The molded web is retained in its molded configuration, at least in part, by bonds between the staple fibers 12 at points of fiber intersection 13. The web may be molded, for example, into the shape of filtering face mask 16.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.