Patents by Inventor Jean Lewis, deceased

Jean Lewis, deceased has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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