| Patents for C23C 12 - Solid state diffusion of at least one non-metal element other than silicon and at least one metal element or silicon into metallic material surfaces (529) |
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| 01/13/1982 | EP0043742A1 Method of gas-chromizing steels |
| 09/22/1981 | US4290391 Diffusion treated articles |
| 07/14/1981 | US4278708 Conductive corrosion resistant material and alkali metal/polysulfide battery employing same |
| 07/01/1981 | EP0031197A1 A method of coating a substrate and an alkali metal/polysulfide battery containing such substrate so coated |
| 06/30/1981 | US4276088 Titanium, alumina, ammonium halide, graphite |
| 03/31/1981 | CA1098254A1 Method for forming a carbide layer of a va group element of the periodic or chromium on the surface of a ferrous alloy article |
| 03/17/1981 | US4256490 Particulate mixture of titanium, chromium, molybdenum, an ammonium halide, alumina, and boron; corrosion resistance; brines and soda solutions |
| 02/10/1981 | US4250208 Method for forming a two-layered carbide surface on a ferrous-alloy article and resulting product |
| 12/30/1980 | US4242151 Chromizing of steels by gaseous method |
| 10/29/1980 | EP0018263A1 Process for chromizing steel articles, and chromized steel articles |
| 06/17/1980 | US4208453 Modified diffusion coating of the interior of a steam boiler tube |
| 04/30/1980 | EP0010484A1 Improvement in the chromising of steel in the gaseous phase |
| 04/01/1980 | US4196022 Diffusion in an alkali metal atmosphere |
| 03/18/1980 | CA1073786A1 Coated cemented carbide product |
| 06/26/1979 | CA1057175A1 Case hardening of coated steel for increasing corrosion resistance and physical properties |
| 06/19/1979 | US4158578 Method for forming a carbide layer of a Va-Group element of the periodic table or chromium on the surface of a ferrous alloy article |
| 05/29/1979 | US4156605 Formed part of sintered iron and method and sintering tile for making same |
| 03/20/1979 | CA1050834A1 Tungsten carbide tools treated with group ivb and vb metals |
| 02/13/1979 | US4139673 Surface-coated blast furnace tuyere made of copper or copper alloy and method of surface-coating the same |
| 11/07/1978 | CA1041881A1 Coated steel product and process of producing the same |
| 08/01/1978 | US4104063 Wear resistant surface |
| 07/11/1978 | US4099993 Process for producing an extremely hard mixed carbide layer on ferrous materials to increase their resistance to wear |
| 01/03/1978 | US4066821 Vapor deposition |
| 12/13/1977 | US4062484 Chromium nitride |
| 04/19/1977 | US4018631 Coated cemented carbide product |
| 03/22/1977 | US4013487 Or cobalt-coated steel with carburized interface |
| 02/08/1977 | US4007302 Carbiding with titanium, chromium dioxide |
| 09/28/1976 | US3983303 Method of manufacturing articles from metal coated with a zirconium nitride layer |
| 04/27/1976 | US3953178 Coated metal product |