Patents Assigned to Chemco Development LLC
  • Method of and compositions for treating wood
    Patent number: 6428902
    Abstract: Pressure impregnation methods for preserving wood. The impregnant combines a wood preservative with a wax-surfactant-water emulsion. A cationic surfactant component made up of two different surfactants is preferred.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: August 6, 2002
    Assignee: Chemco Development LLC
    Inventors: Fred J. Amundson, Frank S. Tracino