Patents by Inventor Gerardus F. J. Steeghs

Gerardus F. J. Steeghs 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: 5134057
    Abstract: Disclosed is a method of providing a substrate with a layer comprising a polyvinyl base hydrogel and a biochemically active material by photolithograhy, comprising coating the substrate by centrifugal force with an aqueous solution of a photosensitive hydrogel forming polymer, a crosslinking agent and a biochemically active material, drying said coating, exposing the coated substrate through a photomask to ultraviolet radiation and developing said exposed coating, which is characterized by applying to the substrate an aqueous solution comprising as the cross-linking agent a polyazonium compound and glutardialdehyde. Because of this specific combination of cross-linking agents superior properties with respect to the binding of the biochemically active material are obtained.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: July 28, 1992
    Assignee: 501 PPG Biomedical Systems, Inc.
    Inventors: Martinus H. Kuypers, Gerardus F. J. Steeghs, Egbert Brinkmann
  • Patent number: 5000180
    Abstract: For a potentiostatically operable, polarographic-amperometric sensor, in particular for biomedical use, wherein a working electrode (5) and a reference electrode (4) are covered by an electrolyte layer (9) which is separated from the medium to be measured by a semipermeable membrane (8), the invention proposes to provide the counter electrode (6) in the form of an external electrode which--for example--can be an outer metal coating surrounding the sensor chip (2) in a three electrode system fabricated as micro-sensor with the integrated technique, and which can be made--for example--of a stainless steel material or of a conductive plastics material.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: March 19, 1991
    Assignee: Biomedical Systems Inc.
    Inventors: Martinus H. Kuypers, Gerardus F. J. Steeghs