Patents Examined by Valarie Fee
  • Wood preservative
    Patent number: 5078912
    Abstract: An agent for impregnating solid wood by the pressure process, based on a water-dilutable formulation of a copper salt, excess alkanolamine and, if required, a salt with a fungicidal anion, has a pH of not less than 8 in the concentration usually employed and corresponding to about 1-5% by weight of non-aqueous components in the aqueous solution.
    Type: Grant
    Filed: May 1, 1991
    Date of Patent: January 7, 1992
    Assignee: Dr. Wolman GmbH
    Inventors: Reimer Goettsche, Hans-Norbert Marx, Wendelin Hettler, Richard Stanek, Hans-Peter Heidenreich