Dow Jones Newswires | The U.S. Supreme Court on today refused to consider an appeal by Exelon Corp. that sought more that $80 million in state investment tax credits from Illinois.

Exelon said it was entitled to the credits because subsidiary Commonwealth Edison Co. purchased and developed nearly $3 billion in property in 1995 and 1996. The Illinois Supreme Court agreed that Exelon qualified for the credits, but it barred the company from obtaining the credits retroactively.