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 Herbert Cassin Wright (chairman), Ernest Albert Umney (vice-chairman), Ernest Blakesley Layman, James Knight, James Hamerton, and Reginald Edward Conder. Hampshire Museum has four "Coal Tar Vaporizers" made by Wright, Layman & Umney in the early 20th century, and some bill-heads (invoices) which were sent to one of their customers, Messrs Charles Mumby & Co, lemonade manufacturers of Gosport. In 1949 the company sued a trader who used a similar name. The law at the time relating to trademarks was covered by the Trade Marks Act 1938. Case law shows that a similar name is not always certain to lead to