ST. PAUL, Minn.--(BUSINESS WIRE)--Ecolab Inc. announced it has closed on the previously announced purchase of the assets of O.R. Solutions, Inc., a privately-held company based in Chantilly, VA. O.R. Solutions is a leading developer and marketer of surgical fluid warming and cooling systems in the United States. Annual sales of the business are approximately $55 million, with more than 85% of O.R. Solutions’ sales from custom fit sterile drapes. The purchase price was approximately $260 million for O.R. Solutions. No other details were announced.