Patents by Inventor Ivar Aanstad

Ivar Aanstad 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).

  • Device for sealing of concrete joints
    Patent number: 5737889
    Abstract: A device for sealing concrete joints is provided. The sealing device includes an elongate section (8) having a larger width than thickness (t). The section (8) has longitudinal edge portions (12, 13) and is intended for casting into two concrete structures (1, 2) for sealing a concrete joint area between the two structures (1,2). A swellable material (7, 14) is provided at least at the longitudinal edge portions (12, 13) thereof. The section (8) is made of a substantially rigid material and is provided with an internal cavity extending over a major part of its width.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: April 14, 1998
    Assignee: Ing. B. Habberstad AS
    Inventors: Bent Habberstad, Ivar Aanstad