| 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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| 12/19/1989 | CA1263933A1 Pack carburizing process for earth boring drill bits |
| 12/13/1989 | EP0345937A1 Method of refining magnetic domains of electrical steels |
| 12/06/1989 | EP0345026A2 Furnace |
| 12/05/1989 | US4885269 With the exclusion of nitrogen to form a film of aluminum oxide free of nitrides; corrosion resistance |
| 11/30/1989 | DE3917004A1 Water-based protective coating composition for local protection of metal surfaces during the heat treatment thereof |
| 11/30/1989 | DE3806933A1 Process for producing oxide layers on steels |
| 11/23/1989 | DE3906217C1 Rod- or ring-shaped workpiece-adapted receiving device for rotationally symmetrical workpieces |
| 11/21/1989 | US4881983 Surface nitriding followed by oxidation of steel component; forming dense, very black iron oxide |
| 11/21/1989 | US4881982 Method for gaseous carburization of steel |
| 11/02/1989 | WO1989010424A1 Process for improving the corrosion resistance of metallic materials |
| 11/02/1989 | WO1989010340A1 Activated metal and method |
| 11/02/1989 | EP0340077A1 Process for increasing the corrosion resistance of metallic materials |
| 11/02/1989 | EP0339474A1 Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics |
| 10/31/1989 | US4877649 Decomposition of hydrocarbon gas to produce boron carbide ceramic; carbiding |
| 10/26/1989 | DE3812020A1 Arrangement for non-contact temperature measurement |
| 10/25/1989 | EP0338038A1 Process and means for making metal inking rolls |
| 10/18/1989 | EP0337107A1 Spinning rotor |
| 10/17/1989 | CA1262354A1 Improved sealing process and sealing agents for aluminum |
| 10/11/1989 | CN1036232A A complex carburizer |
| 10/11/1989 | CN1036149A Boronized toothed plate combination |
| 10/10/1989 | US4873117 Stainless steel tubular element with improved wear resistance |
| 10/04/1989 | EP0277143A4 Shallow case hardening and corrosion inhibition process. |
| 10/04/1989 | CN1035982A Process and means for making metal inking rolls, particularly for flexographic printing, and rolls obtained with such process and means |
| 09/26/1989 | US4869756 Alternating carburization and diffusion steps until desired carbon depth is reached |
| 09/26/1989 | CA1260334A1 Surface treatment of a molybdenum screening mask |
| 09/21/1989 | WO1989008612A1 Process for manufacturing integrally-blackened silver alloy |
| 09/20/1989 | EP0333038A1 Process and device to make a superconductor connection line |
| 09/20/1989 | CN1035634A Method for manufacturing piston |
| 09/19/1989 | US4866927 Process for producing an open-end spinning rotor |
| 09/19/1989 | CA1259551A1 Heat treatment for the production of corrosion resistant steel parts |
| 09/19/1989 | CA1259550A1 Fast case hardening in continuous oven |
| 09/08/1989 | WO1989008155A1 Ductile superconducting composites and method of production thereof |
| 09/08/1989 | WO1989008140A1 Case-hardened plate armor |
| 09/06/1989 | EP0330899A1 Process for making a film of a metal oxide superconductive material having a high critical temperature, and device for carrying out this process |
| 08/29/1989 | US4861751 Production of high temperature superconducting materials |
| 08/22/1989 | US4859251 Carbon monoxide, carbon dioxide, steam mixture; for color television picture tubes |
| 08/22/1989 | CA1258609A1 Shallow case hardening process |
| 08/17/1989 | DE3803687A1 Gebaute nockenwelle Built camshaft |
| 08/16/1989 | EP0328257A2 Magnetron sputtering apparatus and process |
| 08/16/1989 | EP0327831A2 Method and device for increasing the thermal fatigue resistance of heat-conducting materials |
| 08/15/1989 | US4857360 Irreversible color change with heat |
| 08/15/1989 | US4857119 Carbiding, nitriding surface treatment |
| 08/15/1989 | US4857116 Process for applying coatings of zirconium and/or titanium and a less noble metal to metal substrates and for converting the zirconium and/or titanium to a nitride, carbide, boride, or silicide |
| 08/15/1989 | US4856166 Method for manufacturing a gear fit article and gear fit article produced thereby |
| 08/15/1989 | CA1258409A1 Oxidation resistant carbon body and method for making same |
| 08/03/1989 | DE3817616A1 Floor panel of steel sheet |
| 08/02/1989 | CN2042081U Gaseous-carburization controlling instrument using resistance method |
| 08/02/1989 | CN1034399A Boriding paste using boric acid as the boron source |
| 08/02/1989 | CN1034398A Technology for long-term corrosion prevention of the cores made of silicon steel sheets |
| 08/01/1989 | US4853049 Carbon, manganese, chromium with small controlled amounts of aluminum and vanadium |
| 08/01/1989 | US4853046 Ion carburizing |
| 07/25/1989 | US4851095 Magnetron sputtering apparatus and process |
| 07/13/1989 | WO1989006288A1 Ion-nitrided cermet tip and method for producing the same |
| 07/12/1989 | EP0323511A1 Method of low-temperature nitrocarburizing of steel articles |
| 07/12/1989 | CN1004762B Controlled deep ion-nitridation method |
| 07/11/1989 | US4846899 Clad low carbon steels |
| 07/04/1989 | US4844749 Oxidizer and abrasive |
| 06/29/1989 | WO1989005865A1 Carburized low silicon steel article and process |
| 06/29/1989 | WO1989005696A1 Chemical vapor deposition of mixed oxide films |
| 06/27/1989 | US4843039 Sintered body for chip forming machining |
| 06/21/1989 | EP0320706A1 Process for producing layers resistant against corrosion, wear and compaction |
| 06/06/1989 | US4837091 Formed by coating titanium stabilized low carbon steel strip with aluminum, cold rolling, heating |
| 06/06/1989 | US4837053 Precoating fibers with silicon dioxide, immersing in magnesium alloy, oxidizing to form magnesium oxide coating |
| 06/06/1989 | US4836864 Method of gas carburizing and hardening |
| 05/30/1989 | EP0312593A4 Preparation of superconducting ceramic materials. |
| 05/23/1989 | US4833004 Structure of copper conductor and method of forming same |
| 05/16/1989 | CA1254083A1 Surface treatment method for improving corrosion resistance of a ferrous sintered part |
| 05/09/1989 | US4829189 Apparatus for low-temperature plasma treatment of sheet material |
| 05/03/1989 | CN1004084B Cast alloy iron cylinder sleeve with high wear-resisting and good matching properties |
| 05/02/1989 | US4826401 Centrifugal pump |
| 04/26/1989 | EP0313323A1 Coated abrasive grains and a manufacturing method therefor |
| 04/26/1989 | EP0312593A1 Preparation of superconducting ceramic materials |
| 04/19/1989 | CN1032428A Automatical device for rapid heat chemical processing |
| 04/12/1989 | EP0310809A1 Process for continuously desludging salt baths |
| 04/12/1989 | CN2035759U Air pressure regulator for carburization |
| 04/11/1989 | US4820591 Metal substrate, refractory metal layer, refractory metal sulfide coating |
| 04/11/1989 | US4820482 Cemented carbide body with a binder phase gradient and method of making the same |
| 04/11/1989 | US4820473 Method of reducing radioactivity in nuclear plant |
| 04/05/1989 | EP0310560A2 Process for low-temperature coating with a hard layer, and products obtained by this process |
| 04/05/1989 | EP0309684A1 Method relating to the adhesion of polymeric materials to electrolytic copper surfaces |
| 03/30/1989 | DE3831100A1 Process for producing nitrogen diffusion layers in edge zones of iron-containing workpieces |
| 03/29/1989 | EP0309354A1 Automatic apparatus for fast thermochemical treatment |
| 03/29/1989 | CN1032036A Method for low-temp. nitriding of steel pieces |
| 03/23/1989 | WO1989002484A1 Process for the thermal treatment of metal alloys |
| 03/21/1989 | US4814026 Method of producing composite welded components |
| 03/21/1989 | CA1251380A1 Surface preparation of nickel base alloys for brazing |
| 03/08/1989 | EP0306069A2 A method of forming an oxide layer on a substrate |
| 03/08/1989 | CN1031571A Cleaning method of osmosis work-piece using pressure container |
| 03/08/1989 | CN1031570A Method and apparatus for surface treatment |
| 03/07/1989 | US4810326 Etching copper with gas plasma of fluorocarbon |
| 03/01/1989 | EP0305241A1 Process and apparatus for the treatment of surfaces using an electric after-glow in a flowing gas |
| 03/01/1989 | EP0305038A2 Method of annealing an aperture shadow mask for a colour cathode ray tube |
| 02/28/1989 | US4807853 Continuous furnace for gas carburizing and hardening |
| 02/23/1989 | WO1989001414A1 Process and means for making metal inking rolls |
| 02/22/1989 | EP0304047A1 Process and means for making metal inking rolls, particularly for flexographic printing, with highly hardened superficial engraved layer, and rolls obtained with such process and means |
| 02/21/1989 | US4806175 Carburization, nitriding, boriding |
| 02/16/1989 | DE3726072A1 Soldering method |
| 02/16/1989 | DE3726037A1 Process for producing shaped articles from brittle materials |
| 02/15/1989 | EP0303191A2 Method and apparatus for surface treatment |
| 01/31/1989 | US4801338 Process of protective coating of iron and steel products |