Patents by Inventor Johannes Marinus Petrus van Deursen

Johannes Marinus Petrus van Deursen 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).

  • Gas chromatograph apparatus
    Patent number: 6035697
    Abstract: Device for connecting a first duct of a very small diameter, such as for instance a needle or a capillary column, to a second duct, wherein the device comprises a receiving part and a sealing element, wherein the receiving part is provided with a duct bore in which the first duct is slidably receivable, wherein the receiving part is also provided with a sealing-element bore which intersects the duct bore and in which the sealing element is slidably received, wherein the sealing element is provided with a recess, wherein the sealing element is adapted to assume a sealing position in which the duct bore is sealed, and is adapted to assume a connecting position in which the two duct bore parts on either side of the sealing-element bore are in fluid connection with each other via the recess, wherein the sealing element is biased in the sealing position by a spring under spring action.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: March 14, 2000
    Assignee: SGT Exploitatie B.V.
    Inventors: Martinus Frans van der Maas, Johannes Marinus Petrus van Deursen, Ewie de Kuyper
  • Gas Chromatograph apparatus
    Patent number: 5889197
    Abstract: Device for connecting a first duct of a very small diameter, such as for instance a needle or a capillary column, to a second duct, wherein the device comprises a receiving part and a sealing element, wherein the receiving part is provided with a duct bore in which the first duct is slidably receivable, wherein the receiving part is also provided with a sealing-element bore which intersects the duct bore and in which the sealing element is slidably received, wherein the sealing element is provided with a recess, wherein the sealing element is adapted to assume a sealing position in which the duct bore is sealed, and is adapted to assume a connecting position in which the two duct bore parts on either side of the sealing-element bore are in fluid connection with each other via the recess, wherein the sealing element is biased in the sealing position by a spring under spring action.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: March 30, 1999
    Assignee: SGT Explotaitie B.V.
    Inventors: Martinus Frans van der Maas, Johannes Marinus Petrus van Deursen, Ewie de Kuyper