Patents by Inventor Bjorn G. Stenkvist

Bjorn G. Stenkvist 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: 4448205
    Abstract: Device for taking samples of cells from the cervix for preparation and testing of whether abnormal cells are present in the sample, the device consisting of a conical body (1) with a concave undulated lateral surface (5) and a hemispherical tip (3), the undulated surface extending from the base of the conical body to the hemispherical tip. The base radius of the cone is 5-15 mm. The radius of the hemispherical tip is 2-4 mm. The radius of the circular arc defining the concave lateral surface (5) of the conical body (1) is less than 50 mm. The undulated lateral surface defines in cross section taken through an imaginary conical section normal to said surface, and the apex of which lies on the longitudinal axis of the conical body, a sine curve with decreasing wavelength and amplitude along the circular arc approaching the tip. The amplitude and wavelength are 1.5-5 mm at the base of the conical body.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: May 15, 1984
    Inventor: Bjorn G. Stenkvist
  • Patent number: 4435507
    Abstract: Process for preparing cell samples for cytological tests of exfoliated cells, in which the cell sample is in the form of a slurry in a physiological solution, which is introduced into a first chamber (5) provided with a wall (2) with a large number of holes with a cross section of 10-100 .mu.m and communicating with a second chamber (6). The solution is pressed under the influence of a pressure differential between the first (5) and the second (6) chamber through the wall (2) with holes. The material for the cell sample is taken from the solution in the second chamber (6) for smearing on a slide. A suitable device for carrying out the process is also described.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: March 6, 1984
    Inventor: Bjorn G. Stenkvist