| 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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| 03/10/1992 | US5094920 Television picture tube inner shielding material having a blackened layer of superior adhesion and method of manufacturing the same |
| 03/04/1992 | EP0472957A1 Process for improving the corrosion resistance of nitrocarbonized steel components |
| 03/04/1992 | EP0472940A1 Continuous annealing line having carburising/nitriding furnace |
| 02/27/1992 | DE4127063A1 Mfg. epsilon-iron carbonitride layers on steel - by gas carbonitriding so layer contains specific nitrogen and carbon amts. to ensure low porosity, low crack layers |
| 02/25/1992 | US5090969 Coated abrasive grains and a manufacturing method therefor |
| 02/20/1992 | WO1992002658A1 Blade coupler for ultrasonic scalpel |
| 02/19/1992 | EP0471276A1 Method of forming a nitride or carbonnitride layer |
| 02/18/1992 | US5089466 Heat resistance |
| 02/18/1992 | US5089223 Fe-cr-ni-al ferritic alloys |
| 02/18/1992 | CA1295888C Paint coated metal materials |
| 02/12/1992 | CN1058621A Method for manufacturing rust-proof wear resistance cast iron pan |
| 02/11/1992 | US5087303 Manufacture of metal/fiber composites |
| 02/11/1992 | US5087181 Sliding structure such as compressor or the like |
| 02/04/1992 | US5085713 Forging steel blank; copper plating planet gear carrier; finishing by grinding or cutting |
| 01/21/1992 | US5082512 Boronized sliding material |
| 01/15/1992 | CN1057866A Process for applying nitride layers to titanium |
| 01/14/1992 | US5080924 Method of making biocompatible, surface modified materials |
| 01/09/1992 | WO1992000397A1 Method for gas nitriding of alloyed steel articles |
| 01/08/1992 | EP0465333A1 Method and installation for the cementation of metallic alloy articles at low pressure |
| 01/08/1992 | EP0465226A1 Gas-carburizing process and apparatus |
| 01/08/1992 | EP0464799A1 Sliding member and method for producing the same by gas sulphonitriding |
| 01/08/1992 | EP0464396A1 Carbonitride alloys based on the transition metals (M, M*, M**) of groups 4 (M), 5 (M*) and 6 (M**) of the periodic table of elements, process for their production and an application for the carbonitride alloys |
| 01/08/1992 | EP0464265A1 Method for nitriding titanium |
| 01/07/1992 | US5078810 Method of making Ag-SnO contact materials by high pressure internal oxidation |
| 01/02/1992 | DE4020329A1 Goldlegierung zum schwarz-faerben, behandelte bzw. bearbeitete artikel aus schwarz gefaerbter goldlegierung und verfahren zur herstellung der behandelten bzw. bearbeiteten artikel Gold alloy for black-dyeing, treated or processed items from black-colored gold alloy and process for making the treated or processed items |
| 12/26/1991 | WO1991019826A1 Method for gas nitriding of steel articles |
| 12/18/1991 | EP0461876A2 Method for brazing with simultaneous carburization |
| 12/17/1991 | US5073461 Tribochemical method of producing an oxidized surface on a ceramic or metal-ceramic |
| 12/17/1991 | US5073214 Magnetic material for a magnetic head |
| 12/17/1991 | CA1293163C Deposition process of a protective coating on steel products |
| 12/11/1991 | EP0461011A1 Process for coloring a moving metal strip using low temperature plasma |
| 12/11/1991 | EP0460701A1 A method of forming a corrosion-resistant protective coating on aluminum substrate |
| 12/11/1991 | EP0460700A1 Corrosion-resistant protective coating on aluminum substrate or surface and method of forming same |
| 12/06/1991 | CA2043793A1 Low temperature plasma device for coloring a continuously moving metal band |
| 12/04/1991 | CN2090035U Negative-supply auto-clean vacuum cementing furnace |
| 12/03/1991 | US5069938 Method of forming a corrosion-resistant protective coating on aluminum substrate |
| 11/26/1991 | US5067987 Method of manufacturing a silver alloy which is blackened throughout its bulk |
| 11/21/1991 | EP0456847A1 Method of producing a wear- and corrosion-resistant protective coating layer, composed of an austenitic steel alloy and so produced protective layer |
| 11/19/1991 | US5066548 Zinc Or Zinc Alloy Coating |
| 11/15/1991 | CA2016843A1 Thermochemical treatment of machinery components for improved corrosion resistance |
| 11/14/1991 | DE4112583A1 Ceramic-steel composite motor-part - includes free-lying outer surface of steel carburised prior to hard solder bonding to ceramic |
| 11/12/1991 | US5064620 Ferrous u-shaped tube |
| 11/05/1991 | WO1991017286A1 Process for depositing thin film layers onto surfaces modified with organic functional groups and products formed thereby |
| 11/05/1991 | US5062900 Process for the improvement of the corrosion resistance of metallic materials |
| 11/05/1991 | CA2078333A1 Process for depositing thin film layers onto surfaces modified with organic functional groups and products formed thereby |
| 10/29/1991 | CA1291332C Rotary hearth multi-chamber, multi-purpose furnace system |
| 10/23/1991 | EP0453154A2 Pack plating process |
| 10/22/1991 | US5059489 Sintered hard porous body; mixture of metals and metal alloys; catalysts; selective leaching; absorption and desorption |
| 10/21/1991 | WO1991016801A1 A method of nitriding refractory metal articles |
| 10/21/1991 | CA2078120A1 Method of nitriding refractory metal articles |
| 10/09/1991 | EP0450678A2 Sulphur treatment of magnesium-contaminated Fe-Cr-Al alloy for improved oxide whisker growth |
| 10/02/1991 | EP0449793A1 Products made of titanium or titanium alloys with a nitride layer in the surface, and a method of manufacturing such products |
| 09/25/1991 | CN1054802A Low-alloy steel to resist dew point corrosion of sulphuric acid |
| 09/25/1991 | CN1014078B Process for heat treatment of metallic pieces by continous furnace and apparatus thereof |
| 09/24/1991 | US5051140 Surface treatment method for titanium or titanium alloy |
| 09/24/1991 | CA1289357C Automated adaptive installation for fast thermochemical treatment |
| 09/18/1991 | CN1054622A Nitrogen atmosphere gas-mfg. agent |
| 09/12/1991 | DE4007123A1 Plasma treatment appts. - has working vessel with vacuum sealed vessel with evacuation of the intermediate zone |
| 09/11/1991 | EP0446079A1 Industrial material with fluorine passivated film and process of manufacturing the same |
| 09/11/1991 | CN1054449A Low-cost technology for liquid carbonitriding |
| 09/04/1991 | CN1054274A Glow ionitriding and strengthening apparatus |
| 09/03/1991 | US5045126 Nitrogen flushing of furnace |
| 08/27/1991 | US5043224 Chemically enhanced thermal oxidation and nitridation of silicon and products thereof |
| 08/27/1991 | CA2037000A1 Steam turbine components having duplex coatings for improved erosion resistance |
| 08/21/1991 | EP0442162A1 Film of titanium hydride |
| 08/21/1991 | CN1013589B Process for nitriding of aluminium and alloy aluminium |
| 08/17/1991 | CA2036403A1 Film of titanium hydride |
| 08/14/1991 | EP0441630A1 Method for treating the surface of a rotational shaft used in fluid compressing apparatus |
| 08/14/1991 | EP0441262A1 Titanium carbide modified hardfacing for use on bearing surfaces of earth boring bits |
| 08/13/1991 | US5039587 Abrasion resistance |
| 08/13/1991 | US5039357 Method for nitriding and nitrocarburizing rifle barrels in a fluidized bed furnace |
| 08/13/1991 | US5038640 Titanium carbide modified hardfacing for use on bearing surfaces of earth boring bits |
| 08/09/1991 | CA2035285A1 Titanium carbide modified hardfacing for use on bearing surfaces of earth boring bits |
| 08/07/1991 | EP0439614A1 Gas mixture for thermo-chemical treatment of metals and alloys and method of obtaining it |
| 08/07/1991 | CN1053644A Process of boronization on surface layer of aluminium product and its articles thereof |
| 08/06/1991 | US5037496 Cobalt-containing precious metal material for decoration |
| 08/06/1991 | US5037491 Shallow case hardening and corrosion inhibition process |
| 08/06/1991 | US5037070 Melt containment apparatus with protective oxide melt contact surface |
| 07/31/1991 | EP0438980A1 Cobalt-containing precious metal material for decoration and process for preparing the same |
| 07/30/1991 | US5035957 Coated metal product and precursor for forming same |
| 07/26/1991 | CA2009671A1 Ag-sno electrical contact materials and manufacturing method thereof |
| 07/24/1991 | EP0438268A1 Boronized sliding material having high strength and method for producing the same |
| 07/24/1991 | EP0437443A1 Device for glow potential processing, in particular ionic carburation |
| 07/24/1991 | CN1053269A Sulpher ion adding, carbon and nitrogen co-permeating technology |
| 07/23/1991 | US5034282 Process for the powder metallurgical production of working pieces or tools and PM parts |
| 07/23/1991 | US5033927 Device for carrying out sequential thermal treatments under a vacuum |
| 07/17/1991 | CN1013208B Method and apparatus for surface treatment |
| 07/16/1991 | US5032174 Powder particles for fine-grained hard material alloys and a process for the preparation of powder particles for fine-grained hard material alloys |
| 07/16/1991 | US5031290 Electrocatalytic coating, reinforcement |
| 07/11/1991 | CA2007591A1 Gas mixture for thermochemical treatment of metals and alloys, process and apparatus for preparing |
| 07/10/1991 | EP0436099A1 Apparatus for separating gas from a liquid |
| 07/09/1991 | US5030331 Evaporating iridium and carbon by electron beam or sputtering, heating composite film in oxidizing atmosphere, electrolytic oxidation by alternating potential in aqueous solution |
| 07/09/1991 | US5030017 Carburized steel |
| 07/09/1991 | CA1285777C Cemented carbide with a binder phase gradient and method of making the same |
| 07/03/1991 | CN1052707A Method of pretreating metallic works |
| 07/03/1991 | CN1052704A Nitriding furnace apparatus |
| 06/26/1991 | EP0434183A2 Nitriding furnace |
| 06/19/1991 | CN1012907B Surface treatment and material thereof |
| 06/12/1991 | EP0431297A1 Process for carburizing of articles |
| 06/11/1991 | US5022934 Heat treating a metallic workpiece in a fluidized bed |