Filter comprising a material obtained by freeze-drying, method of preparation and use especially in pharmacy
US4883507A · kind A · utility
25Cited by
14References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Jun 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates, by way of a novel industrial product, to a filter for gaseous fluid, which contains a lyophilized and compressed filter element in the form of a porous layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.