Creosote that creosote contained a mixture of creosol and guaiacol. Later investigations by Gorup-Besanez, A.E. Hoffmann, and Siegfried Marasse showed that wood-tar creosote also contained phenols, giving it a feature in common with coal-tar creosote. Historically, coal-tar creosote has been distinguished from what was thought of as creosote proper—the original substance of Reichenbach's discovery—and it has been referred to specifically as "creosote oil". But, because creosote from coal-tar and wood-tar are obtained from a similar process and have some common uses, they have also been placed in the same class of substances, with the terms "creosote" or "creosote oil" referring to
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