Solid state diffusion of only non-metal elements into metallic material surfaces

Official title: Solid state diffusion of only non-metal elements into metallic material surfaces (diffusion of silicon C23C10/00); Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals (C23C14/00 takes precedence)

C23C8/00 (Solid state diffusion of only non-metal elements into metallic material surfaces) appears on 3,135 US grants and 3,062 published applications in this corpus.