Keyspan Gas East Corporation v. Munich Reinsurance America Keyspan Keyspan Case Background New York Allocation Law Consolidated Edison Co. of N.Y. v. Allstate Ins. Co. Matter of Viking Pump, The Unavailability Exception Keyspan Keyspan Looking Forward Keyspan. Keyspan Howard B. Epstein is a partner at Schulte Roth & Zabel, and Theodore A. Keyes is special counsel at the firm.