Original oil and gas trade magazine vintage ad for PROCON INCORPORATED of Des Plaines, IL. Procon. We Build Anywhere on Earth. A Subsidiary of UOP. Pictured is the world's largest LNG project managed by Procon in State of Brunei, Borneo. Whether You're Considering a Refinery, a Chemical or Petrochemical Plant, or a New Process to Produce Energy, Let Us Tackle It. Unique 1977 old petroleum petrochemical process refinery industry construction magazine advertisement.