DuPont has announced its quarterly financial results. The Coatings & Color Technologies business unit reported a ten percent sales in­crease to $1.9 billion. Higher selling prices in all businesses and volume growth in emerging markets more than offset lower volumes in North America., the company said. PTOI increased nine percent to $247 million. Sales growth and favorable currency offset the impact of weak auto and housing markets and higher raw material and transportation costs for the company.