Patents by Inventor Anthony E. Allegrezza

Anthony E. Allegrezza has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Membrane, process and system for isolating virus from solution
    Patent number: 5096637
    Abstract: A composite membrane and process utilizing the membrane which is capable of selectively removing particles such as viral particles from a solution such as a protein solution is provided. The membrane comprises a porous membrane substrate, a surface skin having ultrafiltration separation properties and an intermediate porous zone between the substrate and the skin which intermediate zone has an average pore size smaller than that of the substrate. The intermediate zone is free of voids which break the skin and which directly fluid communicate with the substrate. The composite is capable of a log reduction value of at least 3 (99.9% removal) of particles selectively from solution.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: March 17, 1992
    Assignee: Millipore Corporation
    Inventors: Anthony J. DiLeo, Anthony E. Allegrezza, Edmund T. Burke