(under subclass 290) Processes wherein the base is derived from the trunks or branches of trees or bushes.
(1) Note. Wood particles or fibers which have been chemically changed; e.g., regenerated cellulose etc., or water layed to form a paper, are not considered to be wood.
(2) Note. Injection is assumed to include making a hole in the wood base and therefore injecting is provided for here unless it is clear no hole is made through which the coating material or impregnant enters. If hydraulic pressure is used to force liquid into the pores without utilizing an instrument to make a hole the patent is not here, but in subclasses 440+ below.
