FILE - This Jan. 23, 2012, file photo, shows a DuPont logo on sheets of Tyvek insulation covering a wall of a home under construction in Springfield, Ill. DuPont reported on Thursday, April 19, 2012, ... more 
FILE - This Jan. 23, 2012, file photo, shows a DuPont logo on sheets of Tyvek insulation covering a wall of a home under construction in Springfield, Ill. DuPont reported on Thursday, April 19, 2012, a net income of $1.49 billion, or $1.57 per share, for the quarter that ended March 31, compared to $1.43 billion, or $1.52 per share, for the first quarter of last year. Excluding a one-time pretax charge of $50 million for claims related to its weed killer Imprelis, DuPont says it earned $1.61 a share for the quarter. (AP Photo/Seth Perlman, File) less 
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Associated Press | Photo By Seth Perlman, File
Thu, Apr 19, 2012 12:28 PM EDT