When Schulz learned that physicists at
Columbia University had achieved
fission of a
uranium isotope, he worked and succeeded in devising a process for separating uranium isotopes using
a gas centrifuge, presenting his idea in a paper to university researchers. When the government settled on the
gaseous diffusion process to enrich uranium, Schulz filed for a
patent in 1942 which was granted in 1951. Returning to Union Carbide after receiving his Ph.D. in
chemical engineering from Columbia in 1942, Schulz wrote two papers on the possibility of using
infrared radiation to generate molecular reactions. In 1948, Schulz approached
Charles H. Townes at
Columbia University and offered him a Union Carbide fellowship. Impressed by Schulz's inventiveness, Townes used his fellowship to hire
Arthur L. Schawlow. Together, they later invented the
laser and its cousin, the
maser. Both received the
Nobel Prize in Physics. In the 1960s, Schulz developed new ways to produce solid
rocket fuel and then took a leave from Union Carbide to oversee the
United States Department of Defense's
rocket propulsion program. Finally retiring from
Union Carbide in 1969, and with a grant from the
National Science Foundation, Schulz returned to Columbia to study ways to convert waste to energy. He developed clean processes to produce electricity using solid waste, sewage sludge, and even toxic materials like
PCBs, and
chemical weapons. In 1977, when the United States planned to build the first gas centrifuge plant, the
United States Department of Energy awarded Schulz $100,000 as a royalty for his contribution. ==Personal life==