| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
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| 10/31/1989 | US4877589 Low frequency electric discharge to form plasma |
| 10/27/1989 | EP0298084A4 Method of forming a ceramic product. |
| 10/25/1989 | EP0338068A1 Sinterable nitrides |
| 10/25/1989 | CN1036546A Process for preparation of composition of polydichlorophosphonitriles containing certain proportion of cyclic oligomers |
| 10/24/1989 | US4875908 Separation with permselective membrane |
| 10/19/1989 | WO1989009846A1 Electrochemically controlled superconductivity |
| 10/19/1989 | WO1989009754A1 Process for producing organic products containing silicon, hydrogen, nitrogen, and carbon by the direct reaction between elemental silicon and organic amines and products formed thereby |
| 10/19/1989 | WO1989009747A1 Process for making transition metal nitride whiskers |
| 10/18/1989 | EP0337668A2 Substituted silicon nitride material and method of production thereof |
| 10/18/1989 | EP0337294A2 Process for purifying nitrogen trifluoride gas |
| 10/18/1989 | EP0337076A1 Cyclic separation of oxygen from air using molten salts |
| 10/18/1989 | EP0337000A2 Reactive posttreatment for gas separation membranes |
| 10/18/1989 | EP0336997A1 Process for producing boron nitride |
| 10/18/1989 | CN1036338A Selective adsorption of co2 on zeolites |
| 10/18/1989 | CN1036337A Process for reduction of nitrogen oxides in effluent using sugar |
| 10/18/1989 | CN1005458B Enhanced pressure swing adsorption processing |
| 10/11/1989 | CN1036189A Process for recovery of platinum catalyst |
| 10/10/1989 | US4873061 Solar reactor concentrates heat for reactions with other gases; rapid cooling fixes product equilibrium |
| 10/10/1989 | US4872989 Selective removal of nitrate ions from salt solutions |
| 10/05/1989 | DE3908715A1 Verfahren zur herstellung von pulverfoermigen hochschmelzenden anorganischen verbindungen und metallischen mischkoerpern Process for the preparation of pulverfoermigen refractory inorganic compounds and metallic mischkoerpern |
| 10/04/1989 | EP0335775A1 Process for the preparation of polydichlorophosphazene compounds with a controlled cyclic oligomer content, and compounds obtained by this process |
| 10/04/1989 | EP0335418A2 Membrane process and system for nitrogen production |
| 10/04/1989 | CN1036040A Production of controllable atmosphere of nitrogen contg. co |
| 10/04/1989 | CN1036003A Apparatus and method for producing uniform, fine boron-cont. ceramic powders |
| 10/03/1989 | US4871379 Modular, shell-less, air permeator |
| 09/27/1989 | EP0334791A1 Process for the preparation of silicon nitride |
| 09/27/1989 | EP0334469A1 Gas phase preparation of aluminium nitride or a mixture of aluminium and boron nitrides |
| 09/27/1989 | EP0334121A1 Process for the preparation of hydroxy ammonium salts |
| 09/26/1989 | US4869925 Method for preparing aluminum nitride and its sinter |
| 09/26/1989 | US4869892 Nitriding aluminum monochloride |
| 09/26/1989 | US4869891 Ammonia oxidation catalyst pack |
| 09/26/1989 | US4869890 Prevention of formation of ammonium nitrate without releasing nitrogen oxides |
| 09/26/1989 | US4869883 Inert gas purifier for bulk nitrogen without the use of hydrogen or other reducing gases |
| 09/26/1989 | CA1260671A1 High-purity powder of hexagonal boron nitride and a method for the preparation thereof |
| 09/26/1989 | CA1260227A1 Method of making high purity silicon nitride precursor |
| 09/19/1989 | US4867957 From cyclic phosphonitrile oligomer, dilute solution, high molecular weight |
| 09/13/1989 | EP0332374A1 Amorphous silicon nitride-based fibers composite material reinforced with the fibers and processes for production thereof |
| 09/13/1989 | CN1035442A Improved pressure swing adsorption process and system for gas separation |
| 09/13/1989 | CN1035440A Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents |
| 09/12/1989 | US4866012 Carbothermally reduced ceramic materials and method of making same |
| 09/12/1989 | US4865830 Gas phase preparation of aluminum nitride |
| 09/06/1989 | EP0331448A2 Forming aluminium nitride films |
| 09/05/1989 | US4863893 Low temperature light off ammonia oxidation |
| 09/05/1989 | US4863496 Reactive posttreatment for gas separation membranes |
| 08/31/1989 | DE3805381A1 Nitric acid production with an associated process for cold generation |
| 08/30/1989 | EP0330351A1 Processes for concentrating nitric acid |
| 08/29/1989 | US4861844 Cationic catalysis process for the treatment of a polysilazane containing on average at least two .tbd.SiH groups per molecule |
| 08/29/1989 | US4861560 Continuous delivery without pump; gas evolution to generate pressure |
| 08/29/1989 | CA1258762A1 Nitrogen- or oxynitrogen-containing compounds with a perovskite structure; process for preparing the same and their use for the production of dielectric components |
| 08/22/1989 | US4859639 Process of making amorphous silicon nitride powder |
| 08/22/1989 | US4859443 Preparation of silicon nitride powder |
| 08/22/1989 | US4859435 Controlled stoichiometry; using catalyst |
| 08/22/1989 | US4859434 Production of endothermic gases with methanol |
| 08/22/1989 | US4859217 Process for separating nitrogen from mixtures thereof with less polar substances |
| 08/16/1989 | EP0328199A1 Process for producing nitrosyl fluoride |
| 08/16/1989 | EP0327734A1 Gas separation |
| 08/16/1989 | EP0327732A1 Adsorptive separation utilizing multiple adsorption beds |
| 08/15/1989 | US4857086 Gas separator system |
| 08/10/1989 | WO1989007011A1 Apparatus and method for producing uniform, fine boron-containing ceramic powders |
| 08/09/1989 | EP0327401A2 Apparatus and method for producing uniform, fine ceramic powders |
| 08/09/1989 | EP0326664A1 Process and apparatus for the production of nitric acid by oxidation and absorption of nitrogen oxides |
| 08/08/1989 | CA1258159A1 Reduction of nitrogen- and carbon-based pollutants |
| 08/02/1989 | EP0326360A2 Process for selectively separating water vapour from a gaseous mixture |
| 08/01/1989 | US4853196 Dispersing boron nitride powder in a mixture of water, solvent, surfactants; drying at low temperature and/or water vapor pressure |
| 08/01/1989 | US4853004 Containing coarse particles of c arbon molecular sieve and fine particles of glass beads; enhanced yield |
| 07/26/1989 | EP0325392A2 Method for densely packing molecular sieve adsorbent beds in a PSA-system |
| 07/25/1989 | US4851262 Method of making carbide, nitride and boride powders |
| 07/25/1989 | US4851207 Reacting alumina and carbon with nitrogen gas |
| 07/25/1989 | US4851206 Methods and compostions involving high specific surface area carbides and nitrides |
| 07/25/1989 | US4851205 Alpha-sialon powder and process for its production |
| 07/25/1989 | US4851203 Metal carbide and nitride powders |
| 07/25/1989 | US4851125 Absorption and desorption through semipermeable membrane |
| 07/19/1989 | EP0324171A2 Pressure swing adsorption process and system for gas separation |
| 07/18/1989 | US4849146 Vapor phase reaction boron halide and ammonia; uniform structure |
| 07/18/1989 | US4848985 Pressure swing adsorption |
| 07/18/1989 | CA1257460A1 Cascade heat recovery with coproduct gas production |
| 07/11/1989 | US4847345 Process for manufacturing organic silazane polymers and ceramics therefrom |
| 07/05/1989 | CN1033572A Modular, shell-less, air permeator |
| 07/04/1989 | USH649 From titanium phosphates and metal cyanides |
| 07/04/1989 | US4845060 Sinterable Si3 N4 powder and a process for its preparation |
| 07/04/1989 | US4845059 Process for producing α-Sialon powder |
| 07/04/1989 | US4844878 Process for the reduction of nitrogen oxides in an effluent |
| 06/29/1989 | DE3743008A1 Plant for isolating very pure nitrogen |
| 06/29/1989 | DE3742065A1 Sodium tantalum nitride and also a process for the preparation thereof |
| 06/28/1989 | EP0321637A2 Modular, shell-less, air permeator |
| 06/27/1989 | CA1256458A1 Method of making ultrapure silicon nitride/oxynitride powder |
| 06/27/1989 | CA1256270A1 Production of membrane-derived nitrogen from combustion gases |
| 06/22/1989 | DE3742066A1 Lithium tantalum nitride and also a process for the preparation thereof |
| 06/20/1989 | US4840778 Inorganic polysilazane and method of producing the same |
| 06/20/1989 | CA1256086A1 Binary ion exchanged type x zeolite adsorbent |
| 06/15/1989 | WO1989005280A1 Process for forming fine ceramic powders and products thereof |
| 06/14/1989 | EP0319794A2 Polysilazanes, their preparation, and preparation of silicon nitride-containing ceramic articles. |
| 06/14/1989 | EP0319786A1 Process for preparing secondary powder particles with a nanocrystalline structure and with a closed surface |
| 06/14/1989 | CN1033387A Polysilazanes, process of preparation thereof and ceramic materials containing silicon nitride obtained from polysilazanes and production |
| 06/13/1989 | CA1255475A1 Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents |
| 06/01/1989 | WO1989004884A1 Ceramic fibers and process for their production |
| 05/30/1989 | US4835238 Polysilacyclobutasilazanes |
| 05/30/1989 | CA1254831A1 Combination modality cancer therapy |
| 05/24/1989 | EP0316844A1 High-temperature superconductors, process for their production and use thereof |
| 05/24/1989 | EP0316810A2 Process for the production of linear polyphosphazenes |