Duane Johnson has a total of 1 patent(s) in the database.
* Some patents in this database have one or more inventors, not all of whom may be from Wyoming.
Patent Number: 4152138 View patent at USPTO Title: METHOD FOR SEPARATING A MIXTURE OF MOLTEN OXIDIZED FERROPHOSPHORUS AND REFINED FERROPHOSPHORUS Assignee: Union Carbide Corporation Issue Date: May 01, 1979 Inventor(s): Norman L. Grauerholz, Lewiston, NY
Duane L. Johnson, Arapahoe, WY
Robert L. Ripley, Niagara Falls, NY