Patents by Inventor Karen Dejewski

Karen Dejewski 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).

  • Gravity belt thickener and belt press combination
    Patent number: 4595499
    Abstract: A belt press for use in removing water from sewage sludge, and including a frame, a pair of belts for compressing sludge material therebetween, the said belts being water-permeable whereby water in said sludge may drain through said belts, and a gravity belt thickener adjacent the belt press. The gravity belt thickener includes a belt having a belt flight adapted to support sewage sludge thereon, the belt of the gravity belt thickener having a width greater than the width of the belt of the belt press.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: June 17, 1986
    Assignee: Envirex Inc.
    Inventors: Richard Kormanik, Karen Dejewski, Robert Brummond