Tempe, Ariz. (August 22, 2008) DuPont Air Products NanoMaterials L.L.C. (DA NanoMaterials) remains confident in its legal positions following a Markman ruling as part of the patent invalidity/non-infringement lawsuit with Cabot Microelectronics Corporation, currently under way in the U.S. District Court for the District of Arizona.

The Markman ruling by the Court is an interim pre-trial ruling that did not decide the ultimate issues of the case. Notably, the Markman ruling clarifies what each side will need to prove to establish their respective allegations on invalidity and non-infringement of Cabot's patents at trial. DA NanoMaterials is prepared to proceed to a full trial on the merits against Cabot.

DA NanoMaterials remains committed to its innovative and patented products and looks forward to its opportunity to defend these products in its lawsuit against Cabot and to continue to compete in the marketplace with its superior technology and customer service.

DuPont Air Products NanoMaterials L.L.C. is a joint venture between DuPont (Electronic Technologies) and Air Products and does not release its financial results. It was formed in 2000 and was expanded in April 2004 with the addition of the DuPont EKC Technology CMP slurry business and Air Products' addition of the CMP slurry business from the former Ashland Electronic Chemicals Division, which it acquired in 2003.

About Air Products

Air Products (NYSE:APD) serves customers in industrial, energy, technology and healthcare markets worldwide with a unique portfolio of atmospheric gases, process and specialty gases, performance materials, and equipment and services. Founded in 1940, Air Products has built leading positions in key growth markets such as semiconductor materials, refinery hydrogen, home healthcare services, natural gas liquefaction, and advanced coatings and adhesives. The company is recognized for its innovative culture, operational excellence and commitment to safety and the environment. Air Products has annual revenues of $10 billion, operations in over 40 countries, and over 22,000 employees around the globe. For more information, visit http://www.airproducts.com.

About DuPont

DuPont Electronic Technologies is a leading supplier of electronic materials, including materials for the fabrication and packaging of semiconductors, materials for hybrid, rigid and flexible circuits, and materials for advanced displays. For more information, please visit electronics.dupont.com.

DuPont is a science-based products and services company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 70 countries, DuPont offers a wide range of innovative products and services for markets including agriculture and food; building and construction; communications; and transportation.