Manhattan Project patent: "Process for Production of Deuterium," by H. Urey and A. Gross. Filed 1942, granted 1954. http://www.google.com/patents?id=z7hXAAAAEBAJ&printsec=abstract&zoom=4#v=onepage&q&f=false …
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Manhattan Project patent: "Process for Production of Deuterium," by H. Urey and A. Gross. Filed 1942, granted 1954. http://www.google.com/patents?id=z7hXAAAAEBAJ&printsec=abstract&zoom=4#v=onepage&q&f=false …