Patents by Inventor L. Erik Ohlin

L. Erik Ohlin 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).

  • Patent number: 4746491
    Abstract: An apparatus and method for serial dilution of liquid samples comprises a power-driven measuring valve having a rotatably mounted valve body provided with a single calibrated measuring passageway. During a dilution cycle the measuring passageway in different rotational positions of the valve body successively isolates a measured volume of a sample to be diluted and an equal volume of a first diluted solution of the sample which has been prepared by mixing the isolated undiluted volume of the sample with a measured volume of diluent. In a valve body position between said different rotational positions the measuring passageway is connected to form part of a rinsing flow system.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: May 24, 1988
    Assignee: Swelab Instrument AB
    Inventor: L. Erik Ohlin
  • Patent number: 4617009
    Abstract: Centrifugal batch separation of blood in a closed collapsible container is carried out by placing the container in a rigid casing in which the container is divided into two or more sections in that the casing constricts the container at one or more predetermined positions between the ends of the container. The casing with the container therein is then centrifuged, a gap-like passage between the container sections permitting rearrangement of the contents of the container so that each section will accommodate a blood fraction. After the centrifugation the fractions are isolated from each other. The volume of the cavity within the casing accommodating the radially outermost container section is matched with the hematocrit and the total blood volume by means of filler bodies.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: October 14, 1986
    Assignee: Seroteknik HG
    Inventors: L. Erik Ohlin, H. Peter Unger, J. Eric Westberg