DALLAS--(BUSINESS WIRE)--Kendall Law Group, led by former federal Judge Joe Kendall, is investigating Rentech Nitrogen Partners, L.P. (NYSE: RNF) and its Board of Directors on behalf of unitholders in connection with the proposed sale to CVR Partners, LP (NYSE: UAN). Pursuant to the terms of the merger, Rentech unitholders will receive 1.04 units of CVR Partners units plus $2.57 cash for each Rentech unit. Upon closing, Rentech unitholders will own approximately 35.6% of the combined partnershi