0001237899-04-000014 4 1 20040109 20040112 YANCOPOULOS GEORGE 0001226690 4 34 000-19034 04520239 REGENERON PHARMACEUTICALS INC 777 OLD SAW MILL RIVER TARRYTOWN NY 10591 REGENERON PHARMACEUTICALS INC 0000872589 2834 133444607 NY 1231 777 OLD SAW MILL RIVER RD TARRYTOWN NY 10591-6707 9143477000 4 1 edgardoc.xml PRIMARY DOCUMENT