Filter apparatus with hydrophilic filter material and hydrophobic support
US4863601A · kind A · utility
37Cited by
11References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Apr 21, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J31/08
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A filter bag is positioned inside and fastened to a holding frame. The holding frame has substantially vertical walls and is adapted to be placed on the edge of a coffee cup or the like. The sides of the holding frame that face the filter bag are made of hydrophobic material. The filter bag is made of nonwoven hydrophilic filter material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.