
On November 13, 1934, the Osmose Wood Preserving Co. of America, Inc. was organized in New York State to market this patented wood preservation technology in the United States and Canada. In 1940, Osmose sold its Canadian rights to Osmose Wood Preserving Co. of Canada, Ltd. (Montreal), an unrelated company. Woolworth remained the largest stockholder of Osmose until 1953.
The original Osmose patents described a preservative process using sodium fluoride, potassium bichromate, sodium arsenate, and dinitrophenol. This preservative was known in the industry as "FCAP." Penetration of preservatives was achieved through the process of diffusion or "osmosis" into green wood or wood of high moisture content.
One early commercial use of this preservative in the United States was a timber dipping and stacking process used by coal mines. These mines had a plentiful supply of green timbers that could be treated on-site for use as mine timbers. Another early use was the development of a paste formulation of FCAP preservative for in-place treatment of utility poles in the groundline area. Similar formulations and processes are still in use today for the groundline treatment of utility poles.