This invention concerns pharmaceutically acceptable intramolecularly cross-linked, stromal-free hemoglobin. The intramolecularly cross-linked, stromal-free hemoglobin is useful as a blood substitute for carrying oxygen to tissues and vital organs, as a blood plasma expander, and for supplying oxygen...http://www.google.fr/patents/US4061736?utm_source=gb-gplus-shareBrevet US4061736 - Pharmaceutically acceptable intramolecularly cross-linked, stromal-free hemoglobin