Creosote from both oil shale and petroleum, and are known as oil-tar creosote when derived from oil tar, and as water-gas-tar creosote when derived from the tar of water gas. Creosote also has been made from pre-coal formations such as lignite, yielding lignite-tar creosote, and peat, yielding peat-tar creosote. The term creosote has a broad range of definitions depending on the origin of the coal tar oil and end use of the material. With respect to wood preservatives, the United States Environmental Protection Agency (EPA) considers the term creosote to mean a pesticide for use as a wood preservative meeting the
Wright's Coal Tar Soap an injunction. It has been stated that where a trader adopts words in common use, some risk of confusion is inevitable; it would be wrong to allow someone to monopolise words. A similar confusion will occur when many people have a similar name. In "Wright Layman & Umney Ltd v Wright", 1949, the rule was stated as However, In the late 1960s the Wright's Coal Tar Soap business was taken over by LRC Products (London International Group), which sold it to Smith & Nephew in the 1990s. The soap is now made in Turkey for the current owners of the