Multilayer paper sheet filter cartridges
US4033881A · kind A · utility
65Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1976 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Jan 12, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/0407
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Filter tubes or cartridges are provided comprising a plurality of paper filter sheets of differing pore size, arranged in sequence of fluid flow therethrough according to decreasing pore size, and formed in a concentric corrugated tubular configuration, with at least one foraminous relatively rigid support externally of the outermost and/or internally of the innermost sheet member of the filter tube, in corrugated supporting juxtaposition thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.