| Patents for C21C 1 - Refining of pig-iron; Cast iron (3,137) |
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| 01/25/1977 | US4004630 Process for the manufacture of cast iron |
| 01/18/1977 | US4003424 Method of making ductile iron treating agents |
| 12/28/1976 | US4000011 Chilling the surface area of a body of cast iron to form a layer of cemented carbide |
| 12/28/1976 | US3999984 Method of adding metallic additive to molten metal of higher temperature than boiling point of the additive |
| 12/28/1976 | US3999979 Removal of sulphur from molten metal |
| 12/21/1976 | US3998630 Immersion in molten iron |
| 12/21/1976 | US3998625 Of molten ferrous metals by injecting fluidized mixture of non-oxidizing and of magnesium-containing particles |
| 12/14/1976 | US3997338 Aluminum-carbon-rare earth, alloy |
| 11/16/1976 | US3992196 Method and apparatus for the continuous refining of iron and alloys |
| 11/16/1976 | US3991988 Apparatus for mixing different kinds of metallic material |
| 11/16/1976 | US3991808 Method and apparatus for the introduction of additives into a casting mold |
| 10/12/1976 | US3985546 Method of fluidizing acid cupola slag |
| 10/12/1976 | US3985545 Metal melting method using electric arc furnace |
| 10/05/1976 | US3984233 Ferrous metal network impregnated with rare earth metals |
| 09/21/1976 | US3981721 Method for desulfurizing molten iron |
| 09/14/1976 | US3980283 Apparatus for performing a continuous metallurgical refining process |
| 08/31/1976 | US3977868 Silicon, calcium, chromium, manganese |
| 08/24/1976 | US3976286 Metallurgical lances |
| 08/17/1976 | US3975191 Method of producing cast iron |
| 08/03/1976 | US3973061 Method for the preparation of porous ferrous metal impregnated with magnesium metal |
| 07/27/1976 | US3971433 Apparatus for molding cast iron parts containing spheroidal graphite |
| 07/13/1976 | US3969105 Treating agent for high melting temperature metals |
| 06/29/1976 | US3965962 Process for producing ductile iron casting |
| 06/08/1976 | US3961663 Process of employing a substance in pellet form for nodularizing graphite in liquid cast iron |
| 05/18/1976 | US3957502 Addition of magnesium to molten metal |
| 05/11/1976 | US3955974 Apparatus and method for treating a metal melt with a vaporizable substance |
| 05/11/1976 | US3955973 Process of making nodular iron and after-treating alloy utilized therein |
| 05/11/1976 | US3955966 Desulfurization of pig iron |
| 05/11/1976 | US3955806 Vessel with refractory lining and cover assembly therefor |
| 05/04/1976 | US3954446 Method of producing high duty cast iron |
| 05/04/1976 | US3954133 Spheroidal graphite cast iron pipe of ferritic structure and method of producing the same |
| 04/27/1976 | US3953198 Method for treating molten iron using a magnesium infiltrated metal network |
| 04/06/1976 | US3948648 Method of removing slag incrustations containing calcium oxide |
| 04/06/1976 | US3948612 Pig for manufacturing cast iron |
| 03/23/1976 | US3945819 Ferrous metal network impregnated with magnesium metal |
| 03/16/1976 | US3944195 Apparatus for feeding granular material to a steel bath |
| 03/09/1976 | US3942453 Railway car mixer for the transport of molten metals |