Calcutta High Court justice Jyotirmoy Bhattacharya has dismissed petitions filed by a Birla faction seeking injunction in Birla Corporation?s plan to buy Reliance Infrastructure?s cement business for an enterprise value of Rs 4,800 crore. The petitions were dismissed as not maintainable. The Birlas moved court seeking an order to postpone the high profile cement deal entered between M P Birla Group?s Birla Corporation and Anil Ambani-owned Reliance Infrastructure.