Water-soluble, biodegradable filter, and process of using same
US5922110A · kind A · utility
4Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1998 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Jan 21, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D46/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water-soluble, biodegradable filter medium for removing entrained solid and/or liquid particles from an air stream, and a method of use thereof are disclosed. The filter medium is a solid solution of starch and a biodegradable, water-soluble synthetic polymer. After use, the filter medium is disposed of in an environmentally sound fashion. In particular, the filter medium is dissolved in water and the solid and/or liquid particles collected thereon are removed from the resulting aqueous solution of starch and polymer by decantation and the polymer and starch biodegraded using a conventional biological water treatment process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.