History of Harper

Harper traces its name back to John L. Harper, who patented the first electric kilns and furnaces.

John Harper and his colleagues invent the first furnace to process nuclear fuels and the first commercial graphite-element furnace equipment capable of operating at extremely high temperatures under precise atmospheric controls.

Harper International was formed by private investors to acquire the patents and know-how from John Harper’s company.

Harper became employee-owned through an Employee Stock Ownership Plan.

Harper is the international leader in world-class technology for thermal processing solutions.