Patents Assigned to Her Majesty the Queen In Right of New Zealand Acting by and Through the Minister of Forestry for New Zealand
  • Gaseous or vapor phase treatment of wood with boron preservatives
    Patent number: 5024861
    Abstract: The invention comprises a process for the preservation of timber with a boron based compound, such as trimethyl borate. The timer is dried to a low moisture content, is then subjected to a vapor of the boron compound in a suitable treatment vessel, and after vapor treatment is steam conditioned to return the moisture content of the timber to a normal working level. The vapor treatment is preferably carried out under heat and reduced pressure. Timber preserved by the process is also claimed.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: June 18, 1991
    Assignee: Her Majesty the Queen In Right of New Zealand Acting by and Through the Minister of Forestry for New Zealand
    Inventors: Peter Vinden, Russell J. Burton, Timote M. Vaioleti