ARGONNE NATIONAL LABORATORY / SCIENCE PHOTO LIBRARY ARGONNE NATIONAL LABORATORY / SCIENCE PHOTO LIBRARY
Nuclear power patent. A figure from the patent application of Enrico Fermi and Leo Szilard on the invention of a 'neutronic reactor'. The patent was based on the design of the world's first atomic pile, CP-1. This was built at the University of Chicago's Stagg Field, and achieved its first chain reaction on 2 December 1942. The patent was filed in December 1944, but was not issued (as number 2,708,656) until 17 May 1955 for security reasons.
Model release not required. Property release not required.