Filtration method and apparatus
US5690825A · kind A · utility
30Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Jun 20, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An expansible, compressed foam is used a s a filter medium and captured particulates are released from the foam by expanding the foam to open its pores. Micro-organisms such as Cryptosporidium or Giardia cysts may be trapped and recovered at high eficiency in a small volume of wash liquid easing further analysis. A foam filter element comprises thirty discs (36) of retriculated foam compressed between end plates (28,30) to about one tenth of their original thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.