| Patents for C01B 21 - Nitrogen; Compounds thereof (10,781) |
|---|
| 11/19/1987 | WO1987006923A1 No reduction using sublimation of cyanuric acid |
| 11/19/1987 | WO1987006853A1 REDUCTION OF NOx IN FLUE GAS |
| 11/18/1987 | CN87102750A Semi-permeable membranes comprising predominantly polycarbonates derived from tetrahalobisphenols |
| 11/17/1987 | US4707556 Boron nitride polymeric precursors |
| 11/17/1987 | US4707294 Nuetralization |
| 11/11/1987 | EP0244921A2 Method for recovering platinum in a nitric acid plant |
| 11/10/1987 | US4705837 Method for converting Si-H containing polysiloxanes to new and useful preceramic polymers and ceramic materials |
| 11/10/1987 | US4705762 Process for producing ultra-fine ceramic particles |
| 11/10/1987 | US4705670 Multiple oxidation nitrogen fixation |
| 11/05/1987 | DE3638115C1 Apparatus for the combustion of NH3 |
| 11/04/1987 | CN87100998A Method of nitric acid production through nitrogen fixation with air at low temp. and low pressure |
| 11/04/1987 | CN86209308U Double purpose slide bodies settlement instrument |
| 11/03/1987 | CA1228713A1 Phosphazene trimer purification |
| 11/03/1987 | CA1228712A1 Phosphonitrilic chloride trimer purification |
| 10/28/1987 | EP0242394A1 Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents. |
| 10/21/1987 | EP0242188A2 Method of making silicon nitride precursor |
| 10/21/1987 | EP0242147A2 The use of polycarbonate containing semipermeable membranes in the separation of gases. |
| 10/21/1987 | CN87102971A Powders for ceramics of metal carbides and nitrides made by carbothermal reduction and process for mannfacture |
| 10/21/1987 | CN87102970A Silicon nitride powders for ceramics by carbothermic reduction and process for manufacture thereof |
| 10/20/1987 | US4701316 Nitriding a silica support impregnated with a pyropolymer |
| 10/20/1987 | US4701187 Semipermeability membranes |
| 10/14/1987 | EP0240869A2 Process for the preparation of silicon nitride |
| 10/14/1987 | EP0240530A1 Particulate compositions of ferromagnetic metal oxalates in the form of submicronic needle shaped particles, preparation and application thereof. |
| 10/07/1987 | EP0240414A1 Silicon nitride powders for ceramics obtained by carbothermal reduction, and process for their manufacture |
| 10/07/1987 | EP0240270A1 One-step process for purifying an inert gas |
| 10/06/1987 | CA1227624A1 Making hot pressed silicon nitride by use of low density reaction bonded body |
| 09/30/1987 | EP0239301A2 Production of ceramic materials |
| 09/30/1987 | EP0238654A1 Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions. |
| 09/29/1987 | US4696968 Melt-formable organoaluminum polymer |
| 09/29/1987 | US4696686 Oxygen separating member and process for producing the same |
| 09/24/1987 | WO1987005597A1 Method of forming a ceramic product |
| 09/24/1987 | WO1987005529A1 Pressure swing adsorption process and apparatus |
| 09/23/1987 | EP0238338A2 Process for producing alpha-sialon powder |
| 09/23/1987 | EP0237860A2 Process for the preparation of low carbon content silicon nitride |
| 09/22/1987 | CA1227016A1 Silicon nitride-containing ceramics |
| 09/16/1987 | EP0237052A1 Process for the preparation of aqueous hydroxyl amine solutions |
| 09/16/1987 | EP0236993A2 Process for working up hydroxyl amine and its salt-containing effluents |
| 09/15/1987 | US4693876 Process for the preparation of linear polychlorophosphazene |
| 09/11/1987 | WO1987005298A1 Polysilazanes and related compositions, processes and uses |
| 09/08/1987 | US4692321 Oxidation of ammonia over a mixed catalyst bed of cobalt and aluminum oxides |
| 09/08/1987 | US4692320 Method of making oxynitrides |
| 09/02/1987 | EP0234248A2 Process for the removal of nitrogen oxides (nx oy) from waste gases of ammonia oxidation plants |
| 09/02/1987 | CN86100540A Method for preparing nitrogen group protecting atmosphere by direct reaction |
| 09/01/1987 | US4690841 Pyrolytic boron nitride article |
| 08/27/1987 | WO1987004946A1 A gas concentrating method and plant |
| 08/25/1987 | US4689209 Method for producing nitrous oxide by reacting ammonia with a molten nitrate salt |
| 08/25/1987 | US4689075 Process for producing mixed ultrafine powder of metals or ceramics |
| 08/18/1987 | US4687606 Metalloid precursor powder and method of making same |
| 08/11/1987 | US4686095 Method of making ultrapure silicon nitride precursor |
| 08/11/1987 | US4686070 Method of producing aluminum oxynitride having improved optical characteristics |
| 08/11/1987 | US4685939 Production of oxygen enriched air |
| 08/05/1987 | EP0230958A1 Process for the preparation of an aqueous solution of free hydroxyl amine |
| 08/05/1987 | EP0230895A2 Process for producing hydroxylamine-0-sulfonic acid |
| 08/04/1987 | US4684536 Hard layer formed by incorporating nitrogen into Mo or W metal and method for obtaining this layer |
| 08/04/1987 | US4684377 Process for producing oxygen-enriched gas |
| 07/30/1987 | WO1987004420A1 Nitrogen injection |
| 07/30/1987 | EP0146534A4 Gas scrubbing method and apparatus. |
| 07/28/1987 | US4683129 Process for the production of advanced NF4+ salts |
| 07/21/1987 | US4681091 Combination modality cancer therapy |
| 07/21/1987 | CA1224326A1 Process for the preparation of phosphonitrile chloride oligomer |
| 07/15/1987 | EP0228842A2 Method of making ultrapure silicon nitride precursor |
| 07/14/1987 | US4680278 Process for preparing aluminum nitride powder |
| 07/14/1987 | CA1224016A1 Oxygen production by molten alkali metal salts using multiple absorption-desorption cycles |
| 07/08/1987 | EP0228189A2 A method of making silicon nitride powder |
| 07/08/1987 | EP0228022A2 Process for preparing a silicon nitride powder mixture |
| 07/08/1987 | EP0121518B1 Making hot pressed silicon nitride by use of low density reaction bonded body |
| 07/01/1987 | EP0227324A2 Method of making ultrapure silicon nitride/oxynitride powder |
| 07/01/1987 | EP0227283A2 High-purity silicon nitride fibers and process for producing same |
| 07/01/1987 | EP0227237A1 Method of making yttrium silicon oxynitrides |
| 07/01/1987 | EP0227082A2 Process for preparation of high alpha-type silicon nitride powder |
| 07/01/1987 | EP0226898A2 Composite powder, composite bodies and process for their production |
| 07/01/1987 | EP0226686A1 Process of preparation of anhydrous hydrazine starting from hydrazine hydrate |
| 06/30/1987 | US4677227 Hydrocarbylchloramine, chlorine monoxide |
| 06/30/1987 | US4676965 Process for producing high purity silicon nitride |
| 06/30/1987 | US4676200 Method for use dependent complete evaporation of liquid nitrogen oxide |
| 06/23/1987 | CA1223114A1 Fine powder of aluminum nitride, composition and sintered body thereof, and processes for their production |
| 06/19/1987 | EP0220202A4 Recovery of mixed acids from mixed salts. |
| 06/16/1987 | EP0225412A1 Production of silicon imides and of silicon nitride thereof |
| 06/09/1987 | US4672169 Apparatus and method for heating materials with a laser heat source |
| 06/09/1987 | US4671906 Vibration of melt,inert or reactive gas for bubble forming, solidifying; aluminum, alloys |
| 06/02/1987 | US4670038 Cyclotriphosphazatriene-derivatives as soil urease activity inhibitors |
| 05/27/1987 | EP0223227A2 Cyclic phosphonitrilic halide process |
| 05/26/1987 | US4668494 Steam reforming, ammonia, nitric acid |
| 05/13/1987 | EP0221601A1 [[[(3-Pyridinyl)methylen]amino]oxy]alkanoic acids and esters |
| 05/13/1987 | CN86105412A Step-shaped thermal redaimation and its producing method of gas combined products |
| 05/12/1987 | CA1221710A1 Preparation and composition of sialon grain and powder |
| 05/12/1987 | CA1221526A1 Method of making reaction bonded/hot pressed si.sub.3n.sub.4 for use as a cutting tool |
| 05/06/1987 | EP0220283A1 Process for preparing high purity aluminum nitride |
| 05/06/1987 | EP0220202A1 Recovery of mixed acids from mixed salts. |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 05/05/1987 | US4663138 Washing with alkali metal hydroxide; crystallizing and/or distilling |
| 04/29/1987 | EP0219764A2 Silicon nitride and process for its preparation |
| 04/28/1987 | US4661125 Using zeolite molecular sieves |
| 04/22/1987 | EP0218950A2 Heat exchanger for the assembly with a burner hood of a contact reactor |
| 04/14/1987 | US4657751 Process for purifying aqueous hydrazine hydrate solutions |
| 04/14/1987 | US4657639 Apparatus for electrostatic filtration of N2 O4 for removal of solid and vapor contaminants |
| 04/14/1987 | CA1220319A1 Refractory metal borides, carbides and nitrides and composites containing them |
| 04/09/1987 | WO1987002033A1 Particulate compositions of ferromagnetic metal oxalates in the form of submicronic needle shaped particles, preparation and application thereof |
| 04/09/1987 | WO1987002025A1 Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions |
| 04/09/1987 | WO1987002024A1 Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents |