E.i. Dupont De Nemours and Company

Harold G Spencer

Steven C Brandon

The invention is directed to a method for the separation of gamma globulin from albumin contained in an aqueous solution of both having a pH of 8-10 by ultrafiltration using an altered substrate microfilter having a water permeability of no more than 20 gallons per square foot per day per pound per square inch.

Method for separating serum albumin and gamma globulin

The invention is a process for modifying pore size near the surface of porous materials. The surface is contacted with an alcohol solution of a metal alkoxide which forms a hydrous oxide insoluble in water, an amount of water insufficient to hydrolyze fully the metal alkoxide, and a mineral acid for a time sufficient for the solution to penetrate the surface region but not the bulk. This is followed by exposing to sufficient moisture to complete hydrolysis and then curing to stabilize the metal oxide in the pores near the surface.

Method for reducing the pore size of sintered metal filters by

Stable formed-in-place saccharinic gum membranes on a porous support, the membranes being modified by contact with at least an equivalent of multivalent cations to anionic groups in the gum.

Growing community of inventors

Clemson, SC, United States of America

Harold G Spencer