Patents by Inventor Kjell H. I. Christopherson

Kjell H. I. Christopherson 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).

  • Filtering device
    Patent number: 4498990
    Abstract: A filtering device is disclosed which includes a pressure sensitive control valve to allow for overflow. The filtering device is particularly suitable for use in the medical treatment of blood, e.g., hemofiltration and plasmapheresis.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: February 12, 1985
    Assignee: Gambro Lundia AB
    Inventors: Stanley Shaldon, Kjell H. I. Christopherson, Thore E. Falkvall, Ulf K. Mattisson
  • Device for the diffusion of substances between two fluids via semipermeable membranes
    Patent number: 4447326
    Abstract: A device for the diffusion of substances between fluids through semi-permeable membranes is disclosed. The device includes a stack of longitudinally extending spacer plates alternating between the folds of a folded semi-permeable membrane in which channels extend longitudinally across the face of the spacer plates, and the spacer plates also include ducts extending transversely through the stack at each end thereof, each being in fluid communication with one of the longitudinally extending sides of the spacer plates, and including a fluid connector extending between the transverse ducts at a location displaced from that longitudinally extending side and the longitudinal channels on the spacer plates.
    Type: Grant
    Filed: March 17, 1981
    Date of Patent: May 8, 1984
    Assignee: Gambro AG
    Inventors: Gerhard Riede, Kjell H. I. Christopherson
  • Housing for a medical disk filter
    Patent number: D285606
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: September 9, 1986
    Assignee: Gambro Lundia AB
    Inventor: Kjell H. I. Christopherson