Patents by Inventor Jan P. W. Vermeiden

Jan P. W. Vermeiden 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).

  • Counting compartment for biological investigations and a method for manufacturing such a counting compartment
    Patent number: 6551554
    Abstract: Counting compartment having an inlet and an outlet, and including a bottom plate and a top plate which are held at a distance from each other by material particles which have the same size and are situated at a distance from one another. The particles are surrounded by and embedded in a solid connecting layer formed by an adhesive. The connecting layer extends all around and up to the free end of the outlet of the counting compartment. A fluent mixture of an adhesive mixed with electrostatically charged particles is used to form the counting compartment, the largest size of the material particles determining the depth of the counting compartment. The counting compartment is particularly suitable for counting cells in biological materials such as sperm and blood samples.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: April 22, 2003
    Assignees: Leja Products B.V., Alfons P.A.G. De Kock
    Inventors: Jan P. W. Vermeiden, Leonardus A. J. M. Van De Rotten