Sintered glass bead filter with active microbial destruction
US6783740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Dec 15, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F8/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A microbicidal filter system having superior drop pressure and low complexity is provided, as well as a method for producing the same. The system comprises a plurality of glass beads having pores formed therebetween for the flow of air therethrough. The sintered glass beads are coated in a transition metal oxide and water. An ultraviolet light source is used to cause a photocatalytic reaction between the transition metal oxide and water. Free hydroxyl radicals with microbicidal properties are produced. Urethane foam may be inserted between the glass beads before sintering in order to cause a bimodal pore size distribution, and particulates disposed on the glass beads may be added to alter surface activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.