Patents by Inventor Barbro Margareta Stenqvist

Barbro Margareta Stenqvist 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).

  • Process for cleaning of a dispersion of dispersed particles
    Patent number: 4043908
    Abstract: This invention pertains to a method for removing small impurity particles and dissolved substances from an aqueous dispersion or pulp slurry. The invention in particular pertains to a method for deinking of newsprint. In its most general aspect the invention relates to removing of dissolved substances, preferably organic substances and small impurity particles from an aqueous dispersion.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: August 23, 1977
    Assignees: Kemanord Aktiebolag, Sala International AB
    Inventors: Kelvin Roberts, Barbro Margareta Stenqvist