Norm Larsen

Norman Bernard Larsen (1923—1970) but according to Iris Engstrand, a historian of San Diego and California at the University of San Diego, it was actually Iver Norman Lawson (also an engineer born in Chicago at around the same time as Norm Larsen), and the names became confused over time. The formula was kept as a trade secret, so no patent was ever filed listing inventors. CRC was originally called Corrosion Reaction Consultants, Inc. Its first product was called CRC Corrosion Inhibitor, also called 5–56. By 1970 the product was being used by Sikorsky Aircraft Corp in its helicopters and was also used by the military to keep machine guns working.