Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
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09/15/1993 | CN1076221A Method and apparatus for forming a heat treating atmosphere |
09/15/1993 | CN1076172A Direct process for producing sodium nitrite |
09/11/1993 | CA2091209A1 Method for forming a heat treating atmosphere |
09/11/1993 | CA2090537A1 Reaction injection molding of silicon nitride ceramics having crystallized grain boundary phases |
09/08/1993 | EP0558887A1 Inorganic microporous particles and process for their preparation |
09/08/1993 | EP0558842A1 Process for preparing aluminium nitride powder |
09/07/1993 | US5242882 Catalyst for the production of nitric acid by oxidation of ammonia |
09/07/1993 | US5242753 Wear and erosion resistance; high microhardness |
09/02/1993 | WO1993017156A1 Inert gas purifying system |
08/31/1993 | US5240658 Curing a nondilatant mixture including silicate-forming sintering aid, silicide and curable silicon nitride precursor; heating under vacuum; deoxygenation |
08/31/1993 | US5240474 Air separation by pressure swing adsorption with a high capacity carbon molecular sieve |
08/31/1993 | US5240472 Membrane system; dryer unit incorporates selective surface flow adsorbent membrane of gamma-alumina or silica gel |
08/31/1993 | US5240471 Multistage cascade-sweep process for membrane gas separation |
08/25/1993 | EP0557163A1 Continuous process for the preparation of silicon nitride by carbonitridation |
08/25/1993 | CN1075470A Continuous process for preparing silicon nitride and the silicon nitride prepared |
08/24/1993 | US5238670 Process for preparing ultra-pure nitrogen |
08/24/1993 | CA1321547C Membrane separation system and process |
08/19/1993 | WO1993016016A1 Moisture-resistant aluminum nitride powder and methods of making and using |
08/19/1993 | WO1993016015A1 Process for preparing an amorphous, extra-hard material based on boron nitride |
08/19/1993 | WO1993016014A1 Process for producing ceramic mouldings |
08/19/1993 | WO1993016002A1 Process for forming a dinitramide salt or acid |
08/19/1993 | DE4204009A1 Verfahren zur herstellung von amorphem ultrahartem bornitrid A process for preparing amorphous boron nitride ultrahard |
08/19/1993 | CA2128608A1 Process for forming a dinitramide salt or acid |
08/19/1993 | CA2089700A1 Continuous carbonitriding process for the preparation of silicon nitride; silicon nitride thus produced |
08/18/1993 | EP0259366B1 Polysilazanes and related compositions, processes and uses |
08/18/1993 | CN1075300A Method for continuous preparation of aluminium nitride by carbonitrogenation of aluminium oxide |
08/18/1993 | CN1021808C Method and apparatus for producing silicon nitride powder by laser |
08/17/1993 | US5236685 Preparation of hydroxylammonium salts |
08/17/1993 | US5236684 Process for the preparation of spherical amorphous silicon nitride |
08/14/1993 | CA2088553A1 Polymer precursor for silicon carbide/aluminum nitride ceramics |
08/12/1993 | DE4203269A1 Verfahren zur herstellung von keramikformkoerpern A process for preparing keramikformkoerpern |
08/11/1993 | EP0555184A1 Filler for heat conducting polymers |
08/11/1993 | EP0555110A1 Process for thermochemical oxidation of nitrous oxide |
08/11/1993 | EP0554999A1 Alkali metal azide particles |
08/11/1993 | EP0554805A1 Air separation by pressure swing adsorption with a high capacity carbon molecular sieve |
08/10/1993 | US5234712 Coating with layer of organic silicate; heat treating |
08/10/1993 | US5234676 Buffered aqueous solution with reduced tendency for hydrolysis |
08/10/1993 | US5233837 Liquefaction by using expanded nitrogen-rich gaseous stream to heat exchanging |
08/10/1993 | CA1321154C Method for densely packing molecular sieve adsorbent beds in a psa system |
08/08/1993 | CA2088954A1 Filler for heat-conductive plastics materials |
08/07/1993 | CA2088323A1 Alkali metal azide particles |
08/05/1993 | WO1993015087A1 Metallo-organic precursors |
08/05/1993 | WO1993015032A1 Process of spray drying sialon___________________________________ |
08/05/1993 | WO1993015019A1 Method for obtaining nitrides |
08/04/1993 | EP0554020A1 Silicon nitride powder and method for its manufacture |
08/04/1993 | EP0553072A1 Synthetic porous crystalline material, its synthesis and use. |
08/03/1993 | US5233066 Silicon boron nitride ceramic and precursor compounds, a process for their preparation and their use |
08/03/1993 | US5232891 Process for the manufacture of a gauze for a catalytic converter and a gauze for a catalytic converter manufactured according thereto |
08/03/1993 | US5232677 Preparation of silicon nitride powder by partially nitriding in a fluidized bed and then completing nitridation in a moving bed |
08/03/1993 | CA1320940C Clean nanocrystalline powders and articles made therefrom |
07/31/1993 | CA2088034A1 Air separation by pressure swing adsorption with a high capacity carbon molecular sieve |
07/28/1993 | EP0542871A4 Process for improving the physical and catalytic properties of fluid cracking catalysts |
07/27/1993 | US5230875 Poly(dichlorophosphazenes)/poly(organophosphazenes) having regulated molecular weights |
07/27/1993 | US5230873 Process for producing amorphous boron nitride of high hardness |
07/25/1993 | CA2087549A1 Metallo-organic precursors to titanium nitride |
07/22/1993 | WO1993014027A2 Process for preparing ultrafine aluminum nitride powder |
07/22/1993 | CA2126343A1 Process for preparing ultrafine aluminum nitride powder |
07/21/1993 | EP0238654B1 Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions |
07/20/1993 | US5229468 Polymer precursor for silicon carbide/aluminum nitride ceramics |
07/20/1993 | US5228888 Economical air separator |
07/13/1993 | US5227195 Forming coating of metal carbide, metal oxide and/or metal nitride; intermediate is reacted with reactant containing carbon, oxygen or nitrogen |
07/13/1993 | US5227149 Reacting liquid or supercritical fluid hydrogen sulfide with alkyl silicon compound, silicon tetrachloride, or trialkyl aluminum in autoclave, high pressure |
07/13/1993 | US5227146 Mercaptothiazoles |
07/13/1993 | US5226952 Nitride process for refining calcium |
07/13/1993 | US5226931 Process for supplying nitrogen from an on-site plant |
07/13/1993 | CA1320305C Polysilazanes, processes for their preparation, ceramic materials which contain silicon nitride and can be prepared from them, and preparation thereof |
07/06/1993 | US5225280 Metal containing derivatives of aminotriazine polymer and method of preparing same |
07/06/1993 | US5225174 Solvent, organometallic complex |
07/06/1993 | US5224986 Procss for the recovery of titanium values |
06/30/1993 | EP0548755A1 Nitrogen adsorption with a Ca and/or Sr exchanged lithium X-zeolite |
06/30/1993 | EP0548499A1 Process for the oxidative purification of nitrogen oxides containing exhaust gases |
06/30/1993 | CN1073658A Novel process for the preparation of boron nitride and the thus-obtained boron nitride |
06/30/1993 | CN1021453C Process for preparation of polysilazanes |
06/29/1993 | CA1319712C Carbothermally reduced ceramic materials and method of making same |
06/23/1993 | EP0547387A1 Membrane air drying and separation operations |
06/23/1993 | EP0547071A1 Improvements in or relating to self-gettering catalysts |
06/23/1993 | EP0304478B1 Process for nitrogen oxides reduction with minimization of the production of other pollutants |
06/22/1993 | US5221527 Drying aluminum hydroxide, grinding with carbon in nonaqueous fluid, separating, drying, calcining and heat treating in nitrogen, oxidizing excess carbon |
06/16/1993 | EP0546808A1 Nitrogen sorption |
06/16/1993 | EP0546670A1 Metal nitride films |
06/16/1993 | EP0546014A1 Nitrogen atmospheres |
06/15/1993 | US5219804 Process for preparing ultrafine aluminum nitride powder |
06/15/1993 | US5219539 Process for preparing fine aluminum nitride powder from an inorganic flocculant |
06/15/1993 | US5219537 Powder comprising silicon nitride and elemental silicon |
06/15/1993 | CA1319151C2 ¬¬(3-pyridinyl)methylene|amino|alcohols |
06/09/1993 | EP0545169A2 Silicon containing ceramic powders having a low fluorine content and process for the preparation thereof |
06/09/1993 | EP0544710A1 Improvements in or relating to catalysts and getter systems |
06/08/1993 | US5217939 Catalyst for the prduction of nitric acid by oxidation of ammonia |
06/04/1993 | CA2084268A1 Metal nitride films |
06/02/1993 | EP0544570A1 Process for the preparation of boron nitride and the obtaind boron nitride |
06/02/1993 | CN1021021C Preparation of nitric acid rare earth nickelate catalyst with oxidized nitrogen |
05/29/1993 | CA2083881A1 Process for the preparation of boron nitride and the thus-obtained boron nitride |
05/27/1993 | WO1993011395A1 Combined adjustable-flow rate nitrogen and oxygen production method |
05/27/1993 | CA2101258A1 Combined adjustable-flow rate nitrogen and oxygen production method |
05/26/1993 | EP0543009A1 Process for purifying nitrogen trifluoride gas |
05/26/1993 | EP0543008A1 Ceramic fibers and process for their production |
05/26/1993 | EP0542871A1 Process for improving the physical and catalytic properties of fluid cracking catalysts |
05/26/1993 | CN1020884C Improved process and system for production of dry high purity nitrogen |
05/25/1993 | US5213784 Process for the production of high purity hydroxylammonium nitrate |
05/25/1993 | US5213729 Process for preparing a densified beta-phase silicon nitride material having at least one densification aid, and the material resulting therefrom |