73122054
Apr 8, 1977
Sep 2, 1980
CHEMICALS AND CHEMICAL COMPOSITIONS-NAMELY, A MATERIAL CALLED MICA TOPPING COMPOSITION USED TO INSULATE THE TOPS OF INGOTS OF STEEL SO THAT THEY WILL BE THE LAST TO COOL AND PROVIDE A RESERVOIR OF LIQUID METAL TO FILL IN WHAT WOULD BE THE SHRINK CAVITY
Chemicals