Patent · US Expired

Cross-flow filtration

US4888115A · kind A · utility

105Cited by

3References

33Claims

0Family size

Assignee

CUNO Incorporated · US

Inventors

Paul J. Marinaccio · East Orleans, US
Ronald V. Repetti · Guilford, US

Key dates

Filing date	Dec 29, 1983
Grant date	Dec 19, 1989
Priority date	—
Expiry date	Dec 29, 2003

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2323/30
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for the cross-flow filtration of a liquid comprising circulating the liquid tangential to a charge modified organic polymeric microporous filter membrane. Preferably, the membrane comprises an organic polymeric microporous filter membrane which has a micro-structure throughout the membrane and an amount of a charge modifying agent bound to substantially all of the membrance micro-structure without substantial pore size reduction or pore blockage. The process may be used for the filtration of liquids, particularly parenteral or biological liquids contaminated with charged particulate and for plasmapheresis, particularly in the form of hollow fiber tubes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.