Original oil and gas trade magazine vintage ad for PATENT CHEMICALS, INC. of Cincinnati, Ohio. Blooming Agents Fluorescent Colors for Solvent Extracted and Additive Compounded Lube Oils. Aviation Gasoline Dyes - "Ero" Blue. Petrol colors for gasoline, kerosene, diesel and tractor fuels. Special Products For The Petroleum Industry. Petrol Blue Whitener R and B, Deblooming Agent A, N.P.A. Color. Patent Fuel & Color Corporation, Patent Chemicals, Inc. Cincinnati, OH, and Paterson, NJ. This unique 1951 old petroleum petrochemical refining industry magazine advertisement would look fantastic matted and framed.