Patents by Inventor D. Allen Zelman

D. Allen Zelman 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).

  • Method and apparatus for single pass hemodialysis with high flux membranes and controlled ultrafiltration
    Patent number: 4303068
    Abstract: Disclosed is a method of hemodialysis and a modification for existing hemodialyzers to facilitate use of the method. A highly porous membrane is utilized in a single pass hemodialysis system. The membrane is freely supported, such that it distends in use to maintain a constant transmembrane pressure over its entire surface. The modification to existing dialyzers includes the use of a highly porous membrane, in combination with a transmembrane pressure sensor, which controls the dialysate output flow to maintain a precise transmembrane pressure.
    Type: Grant
    Filed: February 28, 1978
    Date of Patent: December 1, 1981
    Assignee: Rensselaer Polythechnic Institute
    Inventor: D. Allen Zelman