Patents by Inventor Jacobus Ris

Jacobus Ris 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).

  • Flexible sealing member for injection device
    Patent number: 5171304
    Abstract: The invention relates to a flexible sealing member for an injection device, comprising a neck which encloses a channel which is open at one end and is closed at the other end by a diaphragm and has an annular flange at its closed end for a clamping connection of the sealing member in the injection device. The diaphragm is at least substantially in the shape of a spherical cap, its convex outer surface being remote from the open end of the channel in the neck. The invention further relates to an injection device comprising this sealing member.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: December 15, 1992
    Assignee: Duphar International Research B.V.
    Inventors: Jacobus Ris, Hendrik A. van Schoonhoven