Method for wood preservation
OwnerBror O. Hagerinventor
Life of this patent
Estimating the term…
Abstract
An improved method for the preservation of hardwood by treatment thereof with a preservation solution is disclosed. The wood is treated with a preservative solution which is not readily fixed and is then kept in an undried condition for a period of time sufficient to allow the preservative solution to penetrate the wood and diffuse through the cell walls of the wood without fixation thereof. The wood is then dried so as to fix the preservative. Enhanced periods of preservation effectiveness are thus obtained.
Claims18
In a method of preserving foliiferous wood wherein the wood is penetrated by a preservative solution, the improvement comprising:
- penetrating the wood with a solution having a wood preservative dissolved therein;
- maintaining the wood in an undried condition for a period of time of at least two weeks sufficient for the preservative solution to diffuse through the cell walls of the wood without fixation thereof;
- and
- thereafter drying the wood so as to fix the preservative within the wood.
In a method of preserving foliiferous wood by treatment of the wood with a copper-containing ammoniacal preservative, the improvement comprising providing an excess of ammonia in said preservative such that the pH thereof exceeds about 8.2 and maintaining the wood treated with said preservative in an undried state for a period of time of at least two weeks sufficient to permit the preservative to diffuse through the cell walls of the wood, and then allowing the wood to dry such that the preservative then becomes fixed in the wood.
Dependencies are inferred from the claim text.