Patents by Inventor Johan J. Scharstuhl

Johan J. Scharstuhl 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).

  • Process and device for the separation of a body fluid from particulate materials
    Patent number: 5240862
    Abstract: The present invention deals with a process and device for the separation of a body fluid from particulate materials in the fluid to be used for a chemical analysis of the fluid components. The process and device are in particular suitable for the separation of plasma from whole blood. Furthermore the present invention relates to a testing kit for the above mentioned separation and analysis purposes. The device has a collector membrane of defined capacity which intimately contacts the small pore side of a separator membrane having asymmetric pores passing through it permitting the application of a body fluid to the large pore side of the separator membrane.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: August 31, 1993
    Assignees: X-Flor B.V., Primecare B.V.
    Inventors: Dirk M. Koenhen, Johan J. Scharstuhl