Specialized hollow fiber membranes for plasmapheresis and ultrafiltration

US7585412B2 · kind B2 · utility

Assignee

• TRANSVIVO INC. · US

Inventors

• Reynolds G. Gorsuch · Yountville, US
• Henry Grage · Johns Creek, US
• Harold Handley · Encinitas, US
• Harold Peters · Martinez, US
• Jacob Kearns · Laguna Hills, US

Key dates

• Filing date: Apr 14, 2006
• Grant date: Sep 8, 2009
• Expiry date: Aug 25, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D69/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A plasmapheresis and/or ultrafiltration membrane comprises elongated hollow fibers each fiber having an interior lumen extending along the fiber length, the fiber wall having a plurality of zones between the inner and outer wall surfaces, each of the zones having a mass density different than the mass density of an adjacent zone. The fiber wall is characterized by having a lower mass density zone at the inner wall surface and a higher mass density zone at the outer wall surface. The fiber is further characterized by having an average elongation breaking force strength of at least about 0.2 lbs. and an average elongation of at least about 45%.