Patents Assigned to Noviant Oy
  • 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