1 EXHIBIT 23.3 [MARSHALL, O'TOOLE, GERSTEIN, MURRAY & BORUN LETTERHEAD] March 21, 1997 We hereby consent to be named as an expert in the "Legal Matters" and "Experts" section of the Registration Statement on Form S-3 filed with the Securities and Exchange Commission by Illinois Superconductor Corporation. Very truly yours, MARSHALL, O'TOOLE, GERSTEIN MURRAY & BORUN By: /s/ Robert M. Gerstein ------------------------ Robert M. Gerstein RMG/mjm