Calgon Carbon Wins Patent Infringement Lawsuit

PITTSBURGH, PA --December 2, 2002 -Calgon Carbon Corporation (NYSE:CCC) announced today that the Dutch patent court (the court) in The Hague has ruled in its favor in a patent-infringement lawsuit against Royal Pannevis B.V. (Pannevis) and Torus Liquid Separation B.V (Torus) for the supply of ion exchange and chromatographic separation equipment.

The court ruled that Calgon Carbon's patent for its ISEP® and CSEP® systems is valid and is infringed by the SepTor equipment produced by Pan nevis and Torus. The decision restricts Pannevis and Torus from producing and selling their equipment throughout most of Europe. In addition, the court's cross-border injunction prevents Pannevis and Torus from producing, selling, or delivering any SEPTOR equipment from its Dutch headquarters, even if the equipment is produced to be exported out of Europe.

Commenting on the announcement, Jim Cederna, Calgon Carbon's chairman and chief executive officer, said, "We are extremely pleased with the Dutch court's decision. It not only verifies that the patent for our ISEP and CSEP systems is valid, but also demonstrates that we can successfully defend our patents in the international courts."

Mr. Cederna continued, "The court's decision is significant to our business
because it confirms Calgon Carbon as the exclusive supplier of these valuable
specialty systems in ion exchange and chromatographic separations for the food, pharmaceutical, metallurgical, water treatment, and biotechnology markets. It also positions us to pursue damages for several million dollars of SepTor systems that were sold."

Assessing Purification, Separation, Recovery and Synthesis Needs
Calgon Carbon Corporation provides Engineered Solutions to customers' air, water and chemical process problems through design, fabrication and operation of systems that utilize a combination of core technologies: ion exchange and chromatographic separations, ultraviolet light disinfections and oxidation, odor control, solvent recovery, VOC abatement and distillation.

The group includes 160 professional engineers, scientists, sales and marketing personnel, four global manufacturing sites, intellectual property assets of more than 50 patents as well as pilot plant facilities and custom chemical manufacturing capabilities utilizing our technology.

About Calgon Carbon Corporation
Calgon Carbon Corporation is a global leader in services and solutions for making air and water safer and cleaner, and for purifying food, beverage, and industrial process streams.

Headquartered in Pittsburgh, Calgon Carbon Corporation employs approximately 1,000 people and serves more than 4,000 customers around the world through four business platforms: Carbon, Service, Engineered Solutions and Consumer Health.

Calgon Carbon offers a variety of technology solutions and services to address all purification, separation, recovery and synthesis needs.


For more information, visit the Calgon Carbon website at: www.calgoncarbon.com or contact a customer service technician at: info@calgoncarbon.com or call 1-800-422-7266.

Contact: Gail Gerono, Director of Investor Relations and Corporate Communications, (412) 787-6795; gerono@calgoncarbon.com