Wood Marking and Identification
AssigneeTroy Corporation
InventorsRichard Wayne Greene, Barry Dean Haugen, Stephen Edward Cavender
Life of this patent
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Abstract
Wood markers and processes for durably marking and subsequently identifying both original grain wood products and wood-plastic composite products. The wood marker can be dispersed beneath the surface of the wood, where it is protected from the elements and may endure years of exposure to the elements. The wood marker is compatible with state-of-the-art pressure-treating processes and may subsequently be detected for authentication purposes by known analytical methods.
Claims20
A composition of matter, comprising:
- a marker composed of a carboxylate of a metal cation in which the metal is selected from the group consisting of non-biocidal metals having an atomic number in the range of 12 to 83 and mixtures thereof, and a carboxylate anion that includes about 6 to about 18 carbon atoms.
A process for authenticating a wood product, comprising:
- providing a marker fluid dispersion which comprises:
- a disperse marker phase composed of a carboxylate of a metal cation in which the metal is selected from the group consisting of non-biocidal metals selected from the group consisting of non-biocidal metals having an atomic number in the range of 12 to 83 and mixtures thereof, and a carboxylate anion that includes about 6 to about 18 carbon atoms;
- a hydrocarbonaceous solvent;
- and a surfactant;
- and
- a continuous phase composed a conventional water-based pressure treating fluid suitable for improving the resistance of the wood product against fire, weathering or of water or microbial attack or a continuous phase composed of water;
- and
- depositing a detectable amount of the carboxylate in the wood product by exposing the wood product to the marker fluid dispersion at greater than atmospheric pressure;
- and
- identifying the wood product by detecting the presence of the selected metal or the carboxylate in the wood product to authenticate the pressure-treated wood product.
An additive composition for marking wood in water or a water-based pressure-treating solution, comprising:
- a hydrocarbonaceous solvent;
- a bismuth carboxylate dissolved or suspended in the hydrocarbonaceous solvent;
- and
- a surfactant for dispersing the hydrocarbonaceous solvent and the bismuth carboxylate in water or a water-based pressure-treating solution.
Dependencies are inferred from the claim text.