Bottle top filter
US4673501A · kind A · utility
40Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Nov 19, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/204
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A disposable vacuum assisted filter funnel for filtering fluids into bottles. The bottle top filter forms a vacuum dependent seal with the mouth of the bottle. When fluid is introduced into the bottle top filter, the evacuated bottle draws the fluid through the filter into the bottle. The bottle top filter lacks a vacuum plenum between the vacuum source and the bottle. The bottle top filter may be manufactured from one molded piece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.