Filter structure, filter panel comprising the filter structure and method for manufacturing the filter structure
US7621989B2 · kind B2 · utility
3Cited by
35References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 20, 2004 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Aug 8, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J47/018
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pleatable filter structure for use in a filter panel, containing ion exchange particles distributed within a fibrous framework is expanded to contain enough space to allow the ion exchange particles to swell or to be in a swelled state as compared to dry ion exchange particles, without additional expansion of the filter structure. A method of manufacturing the filter structure involves subjecting the filter structure to a moisture treatment in which it is exposed to a humid or water containing environment, whereby the ion exchange particles swell and cause a permanent expansion of the filter structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.