Patents by Inventor Ralph Ippendorf

Ralph Ippendorf 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).

  • Filtrate separating device with flexible deformable liquid and gas impermeable wall
    Patent number: 5182017
    Abstract: Filtrate separating device having a pair of walls connected by a frame defining a receiving space for sludge to be filtered. The walls being displaceable away from one another, and made of a flexibly deformable liquid and gas impermeable material.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: January 26, 1993
    Inventor: Ralph Ippendorf