Patents by Inventor Ulla Urpilainen

Ulla Urpilainen 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).

  • Ligand-modified cellulose products
    Patent number: 6586587
    Abstract: The invention relates to a ligand-modified cellulose product comprising cellulose ether, calcium salt and at least one ligand as a chelating agent. The product can be used e.g. in drilling fluids.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: July 1, 2003
    Assignee: Noviant Oy
    Inventors: Antonius F. Maas, Ulla Urpilainen, Oliver Ruppert