Composite membranes for solid phase extractions and reactions
US5639372A · kind A · utility
11Cited by
25References
27Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 1, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Apr 1, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/528
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A solid phase extraction or chromatographic medium comprises a porous nonwoven fibrous matrix comprising at least one of polytetrafluoroethylene and blown microfibers, and sorptive or reactive hydrophobic siliceous molecular sieve particulates enmeshed in said matrix, the ratio of molecular sieves to matrix being in the range of 40:1 to 1:40.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.