1. (to Du Pont Co.), U.S. Pat. 2,929,804 (Mar. 22, 1960).
2. and (to USM Corp., Boston), U.S. Pat. 3,752,786 (Aug. 14, 1973).
3. and (to Ethicon, Inc.), U.S. Pat. 4,062,834 (Dec. 13, 1977).
4. Transientin vivo protein adsorption onto polymeric biomaterials