NEW YORK (Standard&Poor's) Feb. 17, 2009--Standard&Poor's Ratings Services today said it assigned its 'A' senior unsecured debt rating to DuPont (E.I.) De Nemours&Co.'s proposed offering of $1 billion notes with six and 10-year maturities. At the same time, Standard&Poor's affirmed its ratings on the company, including its 'A' long-term and 'A-1' short-term corporate credit ratings. The outlook is negative. DuPont will use the proceeds of the notes issue for debt refinancing and general corporate purposes. As of Dec. 31, 2008, it had $16.9 billion of total adjusted debt outstanding. We adjusted debt to include about $6.1 billion of tax-effected postretirement obligations, $1 billion of capitalized operating leases, and $200 million of tax-effected
