Patents by Inventor Daniel H. Fruman

Daniel H. Fruman 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).

  • Oil-water separation apparatus
    Patent number: 4022694
    Abstract: Oil-water separation apparatus having a flow-through chamber containing a block of foam filter material regenerable by squeezing, a pair of perforated end plates located on either side of the foam block within the chamber at least one of which responds to applied pressure to squeeze the foam, and a flexible envelope of impervious material surrounding the foam block between the block and the inside walls of the chamber and connected at each end to the plates to avoid channeling and friction between the foam block and the walls of the chamber.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: May 10, 1977
    Assignee: Hydronautics, Incorporated
    Inventor: Daniel H. Fruman