Patents by Inventor Patrick J. Wrobel

Patrick J. Wrobel 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).

  • Apparatus for and method of preparing crystals for washing
    Patent number: 4406679
    Abstract: The invention relates to an apparatus for and method of preparing a slurry for a purification apparatus such as a wash column. A slurry is produced in a crystallizer. The crystals are essentially removed from the concentrated mixture and transported to a more dilute solution. The crystals are caused to dwell in the dilute solution to permit the crystals to ripen and to grow in size significantly.The apparatus that performs the foregoing functions is a gradient column where the change from a concentrated slurry to a dilute slurry takes place. The output of the gradient column is coupled to a holding tank where the residence time of crystals in the dilute solution is prolonged to permit the crystals to ripen.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: September 27, 1983
    Assignee: Concentration Specialists, Inc.
    Inventors: Patrick J. Wrobel, James H. Fraser