Heritage-Crystal Clean, owner of North America’s second-largest rerefinery, announced the expiration of the 35-day “go-shop” period provided for in its agreement to be bought by private equity firm J.F. Lehman & Co. for $1.2 billion. During the “go-shop” period, Heritage-Crystal Clean and its financial advisor engaged with or actively solicited alternative acquisition proposals from 53 potentially interested parties, but no competing proposals were received. The transaction is expected to close in the fourth quarter, subject to customary closing conditions.