Patents by Inventor Charles J. Filz

Charles J. Filz 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 degassing hemodialysis liquid and the like
    Patent number: 4430098
    Abstract: A gas-containing hemodialysis liquid is introduced into a helical coil of tubing formed from a hydrophobic material. Axial flow through the tubing is prevented and the hemodialysis liquid is pressure forced through the hydrophobic material, to free the gases from solution. Gases are released from the liquid through the hydrophobic material into an annular chamber surrounding the tubing.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: February 7, 1984
    Inventors: Donald B. Bowman, Charles J. Filz, James G. Osborn
  • Apparatus for degassing hemodialysis liquid
    Patent number: 4325715
    Abstract: A coil of hydrophobic tubing is wrapped around the side wall of an inner chamber. The gas-containing hemodialysis liquid is delivered into the inner chamber through one end thereof and flows out from the inner chamber into one end of the hydrophobic tubing through an opening at the opposite end of the inner chamber. It then flows through the tubing back towards the first end of the inner chamber, generally countercurrent to flow through the inner chamber. Gases are released from the liquid through the hydrophobic material into an annular chamber surrounding the tubing.
    Type: Grant
    Filed: March 24, 1976
    Date of Patent: April 20, 1982
    Inventors: Donald B. Bowman, Charles J. Filz, James G. Osborn