Patents by Inventor Darrell Holupko

Darrell Holupko 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).

  • High efficiency mixing method
    Patent number: 4421414
    Abstract: The high efficiency mixing method uses an impeller with a central axial hub adapted for attachment to a rotatable driven shaft of a mixer motor. Under certain operating conditions, the method has a higher mass transfer efficiency, in both directions of rotation when compared to other methods using other impellers.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: December 20, 1983
    Assignee: General Signal
    Inventor: Darrell Holupko