Calgon Carbon granted European UV patent, court throws out Canadian patent

European Patent Office advises that it's granting the company a European patent on its process that employs ultraviolet light to prevent infection from Cryptosporidium found in drinking water. In a surprising pre-trial ruling, however, a federal court in Canada declared Calgon Carbon's patent to be invalid, characterizing it as a discovery rather than an invention...


PITTSBURGH, June 20, 2005 (PRNewswire-FirstCall) -- Calgon Carbon Corp. on Friday announced it was advised by the European Patent Office (EPO) that it's granting the company a European patent on its process that employs ultraviolet light (UV) to prevent infection from Cryptosporidium found in drinking water. The European patent is being validated in 19 countries in Europe that are members of the EPO. Calgon Carbon had previously been granted patents on the process in Canada, China, Hong Kong, Israel, the Netherlands, New Zealand, and the United States, and applications are currently pending and awaiting issuance in other countries around the world.

The company also announced another development related to its Canadian patent for the use of UV light to prevent infection from Cryptosporidium. In a surprising pre-trial ruling, a federal court in Canada declared Calgon Carbon's patent to be invalid, characterizing it as a discovery rather than an invention. The company intends to file an appeal, which could be heard later this year.

In Markman hearings in the New Jersey and New York district courts, the Courts agreed with Calgon Carbon's position that its patents broadly cover methods of preventing infection from Cryptosporidium found in drinking water through the use of low dose UV.

Later this year, the U.S. Environmental Protection Agency is expected to promulgate final regulations for the prevention of infection from Cryptosporidium that will include UV light as a primary treatment methodology. Until Calgon Carbon's invention of a process for employing UV light to inactivate Cryptosporidium, the scientific community had rejected UV as a feasible option for treatment of the parasite.

Cryptosporidium is a major health concern worldwide because it is prevalent in drinking water whose source is surface water. When ingested, it can cause cryptosporidiosis, a diarrheal disease which can be fatal in individuals with suppressed immune systems.

Commenting on the announcements, John Stanik, president and CEO of Calgon Carbon, said, "We are very pleased that the European Patent Organization has recognized the validity of our invention by announcing its intention to grant a patent for our process. We are, of course, disappointed with the Canadian ruling. Since it is based solely on Canadian law, the ruling will have no impact in the U.S. where we are engaged in litigation to enforce our patent."

Calgon Carbon Corporation (www.calgoncarbon.com), based in Pittsburgh, Pa., is a global leader in services and solutions for making air and water cleaner and safer. The company employs about 1,100 people at 16 operating facilities and 27 sales and service centers worldwide.

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