| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
|---|
| 01/22/1991 | US4986972 Method for making silicon nitride powder |
| 01/22/1991 | US4986967 Controlled flow of reactive and effluent gases |
| 01/16/1991 | EP0393029A4 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents |
| 01/15/1991 | US4985225 Mixing aluminum compound or aluminum alkoxide with a water soluble carbon-containing compounds, nitrogen-containing compound; integrated circuit ceramic substrates |
| 01/15/1991 | US4985224 From silicon dioxide and ammonia gas |
| 01/08/1991 | US4983553 Continuous carbothermal reactor |
| 01/08/1991 | US4983462 Method for preparing aluminum nitride and its sinter |
| 01/08/1991 | US4983371 Silicon nitride powder of low oxygen content |
| 01/08/1991 | US4983368 Method of producing β-sialon fine powder |
| 01/08/1991 | US4983363 Apparatus for purifying arsine, phosphine, ammonia, and inert gases to remove Lewis acid and oxidant impurities therefrom |
| 01/08/1991 | US4983360 Gallium nitride and oxynitrides used as selective detectors of reducing gases, process of making and device containing them |
| 01/02/1991 | EP0406047A1 Process for heat-treating of metals |
| 01/02/1991 | EP0405265A1 Polyarylene sulfide films for gas separation |
| 12/31/1990 | CA2020077A1 Metal thermal processing |
| 12/27/1990 | EP0404651A1 Solid gas-generating composition and its application in gas generators for inflatable safety bags in motor vehicles |
| 12/25/1990 | US4980144 Removal hydrogen fluoride; then oxygen difluoride using sodium thiosulfate, sodium sulfide, or hydrogen iodide |
| 12/19/1990 | EP0402677A2 Process for making cubic boron nitride from coated hexagonal boron nitride |
| 12/19/1990 | EP0402672A2 Process for preparing polycrystalline cubic boron nitride and resulting product |
| 12/19/1990 | EP0402540A1 Process for concentrating aqueous solutions of hydroxylammonium nitrate |
| 12/16/1990 | CA2012810A1 Process for preparing polycrystalline cubic boron nitride and resulting product |
| 12/14/1990 | CA2014923A1 Process for making cubic boron nitride from coated hexagonal boron nitride and abrasive particles and articles made therefrom |
| 12/12/1990 | EP0401972A2 Production of nitrogen compounds |
| 12/12/1990 | EP0401779A1 4,5,5a,6-Tetrahydro-3H-isoxazolo (5,4,3-kl)acridines derivatives, a process for their preparation and their use as medicaments |
| 12/12/1990 | EP0401663A2 Thin unoriented layer of microcristalline aluminium nitride on a surface, and method for its production |
| 12/12/1990 | EP0377751A4 Method of obtaining silicon nitride with high alpha-phase content |
| 12/12/1990 | CN1047633A Preparation of nitric acid rare earth nickelate catalyst with oxidized nitrogen |
| 12/12/1990 | CN1047632A Process for removal of nox and sox from gas streams using water-soluble, polymeric chelate of polyvalent metal and membrane separation means |
| 12/12/1990 | CN1010751B Semi-permeable membranes comprising predominantly polycarbonates derived from tetrahalobisphenols |
| 12/11/1990 | US4977125 Process for the preparation of silicon oxynitride-containing products |
| 12/11/1990 | US4977113 Reacting source of silicon oxide and aluminum oxide in presence of carbon and silicon nitride, nitriding at high temperature with nitrogen; free of iron oxide impurities |
| 12/11/1990 | US4976933 Hydrogen stream purification |
| 12/11/1990 | US4976795 Alkali(earth) metal azide and molybdenum sulfide in azide modifies polyurethane |
| 12/07/1990 | CA2016122A1 Production of nitrogen compounds |
| 12/05/1990 | EP0400924A2 Process and apparatus for producing a gas which is substantially free of uncombined oxygen from air |
| 12/05/1990 | EP0400355A1 Process for the preparation of crystalline hydroxylammonium sulphate with lower ammonium sulfate content |
| 12/04/1990 | US4975395 Substituted silicon nitride material and method of production thereof |
| 12/04/1990 | US4975260 Heating aluminum hydroxide or aluminum oxide with ammonia and hydrocarbon gas |
| 12/04/1990 | US4975259 Method of liquefying and condensing nitrogen trifluoride and a method of purifying nitrogen trifluoride |
| 11/28/1990 | EP0399866A1 Process for the synthesis of azines, its application in the production of hydrazine |
| 11/28/1990 | CN1047315A Process for polycondensating n-dichlorophosphoryl or n-dichlorothiophosphoryl-p-trichlorophosphazene |
| 11/28/1990 | CN1047266A Improved production of dry, high purity nitrogen |
| 11/27/1990 | US4973457 Decomposition of dinitrogen oxide from combustion of ammonia and oxygen |
| 11/27/1990 | CA1276775C Process for producing an aluminum nitride powder |
| 11/22/1990 | EP0398788A1 Process for the large scale polycondensation of n-dichlorophosphoryl- or n-dichlorothiophosphoryl-P-trichlorophosphazenes |
| 11/22/1990 | EP0398339A2 Adsorptive process for producing two gas streams from a gas mixture |
| 11/22/1990 | EP0397684A1 Process for forming fine ceramic powders and products thereof |
| 11/20/1990 | US4971779 Pyrolysis of polybobazines to boron nitride |
| 11/20/1990 | US4971776 Pollution control absorption of nitrogen oxide to form ammonium nitrite and ammonium carbonate or ammonium bicarbonate |
| 11/19/1990 | CA2017128A1 Process for bulk polycondensation of n-dichlorophosphoryl- or n-dichlorothiophosphoryl-p-trichlorophosphazene |
| 11/15/1990 | DE3915003A1 Catalytic and adsorptive purificn. of nitrogen - in single reactor with integral adsorbent regeneration |
| 11/14/1990 | EP0397204A1 Improved process and system for the production of dry, high purity nitrogen |
| 11/14/1990 | EP0397192A2 Dry, high purity nitrogen production process and apparatus |
| 11/14/1990 | EP0397098A2 Process for the removal of NOx and SOx from gas streams using a water-soluble polymeric chelate of a polyvalent metal and membrane separation means |
| 11/13/1990 | US4970057 Nitriding while monitoring temperature and pressure |
| 11/13/1990 | US4969935 Process for treating a gaseous mixture by adsorption |
| 11/12/1990 | CA2016570A1 Process and system for the production of dry high purity nitrogen |
| 11/12/1990 | CA2016569A1 Dry, high purity nitrogen production process and system |
| 11/12/1990 | CA2016565A1 Production of dry, high purity nitrogen |
| 11/08/1990 | CA2016184A1 Process for the removal of no and so from gas streams using a water-soluble, polymeric chelate of a polyvalent metal and membrane separation means |
| 11/07/1990 | EP0396448A1 Amorphous or turbostratic boron nitride, especially with a spherical morphology and process for its preparation |
| 11/07/1990 | EP0395746A1 Process for making transition metal nitride whiskers. |
| 11/06/1990 | CA1275784C Reduction of nox in flue gas |
| 10/31/1990 | EP0395221A1 Method of reducing the oxygen concentration in a gas stream |
| 10/30/1990 | US4966276 Reacting with dehydration agent |
| 10/25/1990 | DE3912650A1 Expanding residual gas from nitric acid mfr. - to provide coolant for pressure absorption column |
| 10/24/1990 | EP0393029A1 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents. |
| 10/24/1990 | EP0261111B1 Pressure swing adsorption process and apparatus |
| 10/18/1990 | WO1990011858A1 Low temperature method of forming materials using one or more metal reactants and a halogen-containing reactant to form one or more reactive intermediates |
| 10/18/1990 | WO1990011857A1 Method and reactor for obtaining powdered refractory material |
| 10/17/1990 | EP0392941A1 Use of boron and nitrogen-based polymers as precursors for boronnitride-based ceramics thus obtained |
| 10/17/1990 | EP0392685A2 Process for producing particulate ceramic materials |
| 10/16/1990 | US4963232 Process for producing a purified hydrazine hydrate |
| 10/10/1990 | EP0391351A2 Process for the preparation of an improved chabazite for the purification of bulk gases |
| 10/10/1990 | EP0391150A1 Process for the production of low-carbon fine particle ceramic powder |
| 10/10/1990 | CA2014237A1 Particulate ceramic materials and production thereof |
| 10/06/1990 | CA2013529A1 Process for the preparation of an improved chabazite for the purification of bulk gases |
| 10/03/1990 | EP0389962A2 Sinterable ceramic powder and method of making it, silicon nitride ceramic made therefrom, method of making it and its use |
| 10/03/1990 | CN1009819B Process for manufacture of silicon nitride and aluminium nitride powders by carbothermal reduction |
| 10/02/1990 | US4960579 Membrane process and system for nitrogen production |
| 10/02/1990 | CA1274674A1 Ceramics from silazane polymers by heating in different atmospheres |
| 09/25/1990 | USRE33352 Absorption process for producing oxygen and nitrogen and solution therefor |
| 09/25/1990 | US4959088 Method of producing nitric acid and refrigeration |
| 09/20/1990 | WO1990010499A1 Process for improving the physical and catalytic properties of a fluid cracking catalyst |
| 09/18/1990 | US4957720 Evaporation and superheating using process heat of nitrogen oxide gases formed |
| 09/18/1990 | US4957716 Method for removal of SO2 and NOx from combustion gases by metal chelation and thermal reduction |
| 09/18/1990 | CA1274065A1 Process for the manufacture of nitric oxide |
| 09/11/1990 | US4956168 Slurrying, salt formation, high shear mixing, agitation, acidification |
| 09/11/1990 | US4956163 Method of forming amidophosphates in aqueous solutions |
| 09/10/1990 | CA2011873A1 Process for improving the physical and catalytic properties of fluid cracking catalysts |
| 09/07/1990 | WO1990009958A1 Preparation of nitrosyl fluoride |
| 09/05/1990 | EP0385772A2 Pyrolytic boron nitride |
| 09/05/1990 | EP0385096A1 Process for producing sinterable crystalline aluminum nitride powder |
| 09/05/1990 | EP0338068A4 Sinterable nitrides |
| 09/04/1990 | US4954461 High purity and high strength inorganic silicon nitride continuous fiber |
| 09/04/1990 | US4954329 Process and apparatus for preparation of finely grained lead azide |
| 09/04/1990 | US4954328 Synthesis of hydroxylamine salts |
| 09/04/1990 | CA1273473A1 Purification process for aqueous hydrazin hydrate |
| 08/29/1990 | EP0384857A1 Process for the preparation of boron nitride |
| 08/29/1990 | EP0384565A1 Treatment of nitrogen oxides |
| 08/29/1990 | EP0384563A1 Ammonia oxidation process and catalyst therefor |