Oslo, 12 April 2002.
PhotoCure ASA announces today that it filed papers in an Australian court to invalidate Australian patent number 624985 assigned to Queen's University at Kingston in Canada. The Queen's University patent, which is licensed to DUSA Pharmaceuticals, Inc., relates to a method for photodynamic therapy using 5-aminolevulinic acid. In the papers filed today, PhotoCure asserts that publications which predate the Queen's University patent preclude the patenting of 5-aminolevulinic acid for photodynamic therapy.