Exhibit 4.1 SETTLEMENT AGREEMENT This Agreement is between BOARD OF REGENTS OF THE UNIVERSITY OF TEXAS SYSTEM and THE UNIVERSITY OF TEXAS M.D. ANDERSON CANCER CENTER, Plaintiffs (collectively referred to herein as "Board of Regents"), and THE LIPOSOME...Settlement Agreement • October 1st, 1997 • Liposome Co Inc • Biological products, (no disgnostic substances) • Texas
