Patents Assigned to Polymer Wood Processors, Inc.
  • Preservation of wood with phenol formaldehyde resorcinol resins
    Patent number: 5612142
    Abstract: Wood and other cellulose-based products are preserved with a water-based treating solution containing a phenolic resin prepolymer such as phenol formaldehyde resin prepolymer, a resorcinol formaldehyde resin prepolymer and water. The treatment is carried out by exposing the wood or other cellulose-based product, while submerged in the treating solution, to one or more cycles of reduced pressure (i.e. vacuum) and elevated pressure.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: March 18, 1997
    Assignee: Polymer Wood Processors, Inc.
    Inventor: Jean Lewis, deceased
  • Preservation of wood with phenol formaldehyde resorcinol resins
    Patent number: 5461108
    Abstract: Wood and other cellulose-based products are preserved with a water-based treating solution containing a phenolic resin prepolymer such as phenol formaldehyde resin prepolymer, a resorcinol formaldehyde resin prepolymer and water. The treatment is carried out by exposing the wood or other cellulose-based product, while submerged in the treating solution, to one or more cycles of reduced pressure (i.e. vacuum) and elevated pressure.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: October 24, 1995
    Assignee: Polymer Wood Processors, Inc.
    Inventor: Jean Lewis, deceased