Registered trademark of the Huntsman Corporation. However, the term Ureol is usually used as a synonym for board material (brown modeling board). In practice, the term Ureol board is commonly used. However, the first polyurethane board was invented by Rudolf Rampf and not by Huntsman. At that time, it was sold via Ciba and Huntsman, which were distribution partners. Today, RAMPF distributes the original Ureol board under the RAKU® TOOL trademark.