Patents by Inventor Gerald W. Tumanic

Gerald W. Tumanic 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).

  • Paper filter for removing metal cations
    Patent number: 5718827
    Abstract: Disposable paper filters suitable for removal of contaminants from fluids such as water or air are disclosed. Specific embodiments include single-ply and multi-ply filters in which metal removal additives and/or halogen and organic contaminant removal additives have been distributed during the manufacturing process. Special manufacturing methods for producing such composite filters are also described.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: February 17, 1998
    Assignee: Little Rapids Corporation
    Inventors: Theodore B. Rydell, Joseph D. Wahlquist, Gerald W. Tumanic
  • Disposable filters and manufacturing process
    Patent number: 5554288
    Abstract: Disposable paper filters suitable for removal of contaminants from fluids such as water or air are disclosed. Specific embodiments include single-ply and multi-ply filters in which metal removal additives and/or halogen and organic contaminant removal additives have been distributed during the manufacturing process. Special manufacturing methods for producing such composite filters are also described.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: September 10, 1996
    Assignee: Little Rapids Corporation
    Inventors: Theodore B. Rydell, Joseph D. Wahlquist, Gerald W. Tumanic