Air filter
US5820644A · kind A · utility
29Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Apr 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/13
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air filter suitably usable in an air cleaner, room air-conditioner or especially in car air-conditioners in which air is driven at a high speed. The air filter is made of a pleated polyurethane foam having on one or both sides thereof a three-dimensional network skeletal structure of micro cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.