| Patents for C23C 8 - Solid state diffusion of only non-metal elements into metallic material surfaces; 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 (10,951) |
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| 03/11/1980 | CA1073325A1 Atmosphere compositions and methods of using same for surface treating ferrous metals |
| 03/04/1980 | US4191599 Carburization followed by rapid quenching, gradients0 |
| 03/04/1980 | US4191598 Jet recirculation method for vacuum carburizing |
| 03/04/1980 | CA1072829A1 Coating articles |
| 02/20/1980 | EP0008228A2 Internally nitrided ferritic stainless steels, and methods of producing such steels |
| 02/20/1980 | EP0007988A1 An apparatus for dumping heat treatment material contained in a batch container |
| 02/19/1980 | US4189332 Brass coated steel filament treated with benzotriazole to promote corrosion resistance and adhesion to rubber |
| 02/12/1980 | US4188242 Combination carburizing and boronizing methods |
| 01/23/1980 | EP0007115A1 Metal piece, the surface of which can take an unwanted electrostatic charge, and its application |
| 01/22/1980 | US4184899 Pretreating in cyanide, cyanate, and sulfur-containing salt bath to prevent oxide film formation; nitriding |
| 01/22/1980 | CA1070223A1 Subscale reaction strengthening of low carbon ferrous metal stock |
| 01/15/1980 | US4183781 Stabilization process for aluminum microcircuits which have been reactive-ion etched |
| 01/01/1980 | US4181541 Thermochemical treatment system and process |
| 12/25/1979 | US4180697 Vacuum oven with graphite heating |
| 12/18/1979 | US4179618 Apparatus for ion-nitriding treatment |
| 12/18/1979 | US4179617 Glow discharge, heating efficiency from shield |
| 11/27/1979 | US4175986 Inert carrier gas heat treating control process |
| 11/27/1979 | CA1066999A1 Method of finishing a steel article having a boronized and carburized case |
| 11/13/1979 | US4174338 Pasty compositions for crosslinking organopolysiloxanes to silicone rubber |
| 11/06/1979 | US4173501 Steel torsional element and method for making |
| 10/23/1979 | CA1064963A1 Vapor phase oxidation process for glyoxal |
| 09/18/1979 | US4168186 Method for control of the carburization of parts in a vacuum furnace |
| 09/18/1979 | US4168184 Oxidation to chromium oxide |
| 09/11/1979 | CA1062132A1 Pack nitriding process for low alloy steel |
| 09/04/1979 | US4166610 Vacuum carburizing furnace |
| 08/28/1979 | US4165867 Installation for nitriding-sulphidizing of steel and iron elements |
| 08/28/1979 | CA1061226A1 Differentially carburized rock bit cutter |
| 08/21/1979 | US4165243 Method of making selectively carburized forged powder metal parts |
| 08/07/1979 | US4163680 Process for carbonitriding steel and cast iron articles |
| 07/10/1979 | US4160680 Vacuum carburizing |
| 07/10/1979 | CA1058064A1 Process for nitriding iron and steel in salt baths |
| 06/26/1979 | CA1057175A1 Case hardening of coated steel for increasing corrosion resistance and physical properties |
| 06/26/1979 | CA1057052A1 Free floating flight in a retort |
| 06/05/1979 | CA1055972A1 Belleville spring |
| 05/29/1979 | CA1055620A1 Semiconductor diffusions from ion implanted films |
| 05/15/1979 | US4154629 Process of case hardening martensitic stainless steels |
| 05/15/1979 | US4154628 Quench hardening of gears |
| 05/08/1979 | US4153481 Graphite covering a molten bath of alkali metal chloride and carbonate |
| 05/08/1979 | US4153480 Method for forming an anticorrosive oxide layer on steels |
| 05/08/1979 | CA1054030A1 Process for producing diffusion layers of carbides, nitrides and/or carbonitrides |
| 05/01/1979 | US4152177 Method of gas carburizing |
| 05/01/1979 | CA1053547A1 Process for coating inorganic substrates with carbides, nitrides and/or carbonitrides |
| 04/17/1979 | US4149912 Process for treating aluminum and aluminum alloy surfaces |
| 04/17/1979 | CA1052669A1 Process for hardening work pieces made from steel and arrangement for carrying out the process |
| 04/10/1979 | US4148705 Gas plasma reactor and process |
| 03/20/1979 | US4145232 Carburizing atmosphere comprising carbon monoxide, carbon dioxide, hydrogen, nitrogen, water; controlling flow rate |
| 03/06/1979 | US4142957 Continuous readjustment of glow discharge current based on measurements |
| 03/06/1979 | CA1049908A1 Method of maintaining low values of cyanide in cyanate salt baths |
| 03/06/1979 | CA1049906A1 Steel sheets and strips |
| 03/06/1979 | CA1049905A1 Method for treating parts made of titanium or titanium alloy; and parts produced thereby |
| 02/27/1979 | US4142008 Carbon filament coated with boron and method of making same |
| 02/27/1979 | US4141759 Treatment with superheated steam, first cleaning surface with nitrogen, oxygen or air |
| 01/16/1979 | USRE29881 Method of vacuum carburizing |
| 01/16/1979 | CA1046385A1 Internal nitridation of cobalt-base superalloys |
| 01/09/1979 | US4133515 Heat treatment |
| 12/26/1978 | US4131492 Steel article having a nitrided and partly oxidized surface and method for producing same |
| 12/26/1978 | US4131473 Aluminum, magnesium, calcium silicon, iron oxide, chromium oxide, boric oxide, ferroboron |
| 12/19/1978 | US4130762 Arrangement for the automatic heating and adjustment of a treatment temperature for the treatment of workpieces by means of glow discharge |
| 12/05/1978 | CA1043672A1 Process for producing diffusion layers |
| 11/21/1978 | US4126488 Boriding agent for boriding mass produced parts of ferrous and non-ferrous metals |
| 11/14/1978 | CA1042321A1 High temperature abrasion resistant coatings |
| 11/07/1978 | US4124199 Process and apparatus for case hardening of ferrous metal work pieces |
| 10/31/1978 | US4123583 Core of amorphous carbon, integral skin layer of graphite having boron dispersed therein, and outer layer of boron |
| 10/24/1978 | CA1040984A1 Method for passivating chromium |
| 10/10/1978 | US4119444 Pack nitriding process for low alloy steel |
| 10/10/1978 | US4119443 Method for manufacturing hardened machined parts |
| 10/03/1978 | US4118624 Frame for the support of articles which are to be treated |
| 10/03/1978 | US4118252 Process for albedo control of molybdenum articles |
| 09/26/1978 | CA1039160A1 Methods of heat-treating steel |
| 09/19/1978 | CA1038734A1 Heat-treatment of steels |
| 09/05/1978 | CA1037844A1 Regeneration process |
| 08/22/1978 | US4109157 Apparatus for ion-nitriding |
| 08/22/1978 | US4108693 Method for the heat-treatment of steel and for the control of said treatment |
| 08/22/1978 | CA1036916A1 Process for the regeneration of nitriding and carburizing salt baths |
| 08/22/1978 | CA1036915A1 Continuous carburizing method |
| 07/25/1978 | US4102838 Applying a paint containing titanium dioxide, solvent, and a burnable resin |
| 05/09/1978 | US4088510 Magnesium oxide dynode and method of preparation |
| 04/04/1978 | US4082575 Aluminum oxide layer on aluminum bearing steel alloy |
| 03/14/1978 | US4078949 Method for improving the surface quality of stainless steels and other chromium-bearing iron alloys |
| 01/31/1978 | US4071382 Method for case hardening powdered metal parts |
| 12/20/1977 | US4063967 Method of producing a doped zone of one conductivity type in a semiconductor body utilizing an ion-implanted polycrystalline dopant source |
| 12/13/1977 | US4062702 Process for partially insulating surfaces of metal work pieces |
| 11/15/1977 | US4058552 Esters of p-carbonylphenoxy-isobutyric acids |
| 10/25/1977 | US4055686 Method of forming metal hydride films |
| 09/27/1977 | US4050957 Process for the passivation of ferrosilicon |
| 09/20/1977 | US4049473 Methods for carburizing steel parts |
| 09/20/1977 | US4049472 Atmosphere compositions and methods of using same for surface treating ferrous metals |
| 09/13/1977 | US4047981 Internally nitrided ferritic stainless steel strip, sheet and fabricated products and method therefor |
| 09/06/1977 | US4046601 Method of nitride-strengthening low carbon steel articles |
| 08/30/1977 | US4045597 Process for modifying amorphous carbon filaments |
| 08/23/1977 | US4043839 Diffusion |
| 08/16/1977 | US4042428 Process for hardening iron-containing surfaces with organic solvent and ammonia |
| 08/16/1977 | US4042427 Nitridation of iron and iron alloys |
| 08/02/1977 | US4039354 Method of making Belleville springs |
| 07/26/1977 | US4038109 Three phase heat treatment of steel sheet |
| 07/19/1977 | US4036482 Apparatus for hardening workpieces of steel |
| 07/12/1977 | US4035204 Method of carburizing the inner surface of a steel valve seat |
| 07/12/1977 | US4035203 Method for the heat-treatment of steel and for the control of said treatment |
| 07/12/1977 | US4035200 Process for making an oxide-layer |
| 06/07/1977 | US4028142 On iron, boron, silicon andor group 4b to 6b metals by decomposition to produce diffusion layers |