Patents by Inventor Arthur W. Etchells

Arthur W. Etchells 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).

  • Procedure for designing efficient affinity cell separation processes
    Patent number: 5215926
    Abstract: Processes using affinity cell separation are used to increase the yield and purities of target cells by increasing the cell:affinity surface contact rate, limiting the shear force on the attaching cells and/or using an appropriate affinity surface area.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: June 1, 1993
    Assignee: CellPro, Inc.
    Inventors: Arthur W. Etchells, III, Dale R. Peterson
  • Non-degrading pressure regulator
    Patent number: 4886086
    Abstract: A fluid pressure regulator for metallic flake pigment and other potentially degradable paints is provided by utilizing an orifice of such cross-section, shape and length so as to provide the desired pressure drop while at the same time maintaining flow in the laminar regime through the regulator.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: December 12, 1989
    Assignee: Graco, Inc.
    Inventors: Arthur W. Etchells, David J. Donofrio