Patents by Inventor Annika Karlsson

Annika Karlsson 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).

  • Paper or paperboard laminate and method to produce such a laminate
    Patent number: 6537680
    Abstract: Paper or paperboard laminate composed of at least one bulk-promoting layer, here termed the bulk layer, and on at least one side at the bulk layer at least one secondary layer, secondary layer and bulk layer being joined to one another directly or indirectly over basically the whole of their surfaces facing one another, 40-95% of the bulk layer consists of cellulose fibers with a freeness of 550-950 ml CSF, the secondary layer/layers has/have a greater density than the bulk layer, and the laminate has a bending stiffness index higher than 2.5 Nm7/kg3, but less than 14 Nm7/kg3, calculated as a geometric mean value for machine and transverse direction.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: March 25, 2003
    Assignee: Stora Kopparbergs Bergslags Aktiebolag (publ)
    Inventors: Leif Norlander, Annika Karlsson, Mats Fredlund