Patents by Inventor Heidi Johnsen

Heidi Johnsen 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).

  • POLYMER PARTICLE
    Publication number: 20130277621
    Abstract: A heat-treated polymer particle comprising an addition polymer core particle which has had swollen and polymerised therein a blend of an aromatic alcohol with an aldehyde or a blend of an aromatic amine or urea with an aldehyde and which has been subsequently heat treated, e.g. to a temperature of at least 150° C.
    Type: Application
    Filed: October 28, 2011
    Publication date: October 24, 2013
    Applicant: CONPART AS
    Inventors: Keith Redford, Helge Kristiansen, Heidi Johnsen, Ruth Schmid, Justyna Justynska