| Patents for C07C 273 - Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups (3,705) |
|---|
| 02/25/1992 | CA1296339C Antihyperlipidemic and antiatherosclerotic urea and carbamate compounds |
| 02/20/1992 | DE4026201A1 Treatment of flue gas |
| 02/18/1992 | US5089525 N-(halobenzoyl)-N'-2-halo-4-[1,1,2-trifluoro-2-(trifluoro-methoxy)ethoxy]-phenyl-ureas with insecticidal activity |
| 02/16/1992 | WO1992003413A1 Diphenylurea derivatives |
| 02/16/1992 | CA2089165A1 Diphenylurea derivatives |
| 02/05/1992 | EP0469781A2 Separation of carbon dioxide and nitrogen from combustion exhaust gas with nitrogen and argon by-product recovery |
| 02/04/1992 | CA1295340C Process for the preparation of n,n-diaryl-ureas |
| 01/28/1992 | US5084202 Isocyanate prepolymers and secondary amines from disecondary amines and alkyl diisocyanates |
| 01/08/1992 | EP0464307A1 Process and device to improve the performances and the life, with corrosion reduction, in Kettle type carbamate condensers in urea plants |
| 01/07/1992 | US5078980 Process for the removal of isocyanic acid from a mixture of isocyanic acid and ammonia |
| 01/02/1992 | EP0463484A1 Vacuum separators for use in urea plants |
| 01/01/1992 | CN1057453A Process for concentrating urea solutions under vacuum |
| 12/17/1991 | CA1293195C Antiatherosclerotic substituted ureas and thioureas |
| 12/11/1991 | EP0460446A1 Coupling agent for peptide synthesis |
| 12/11/1991 | CN1056869A Process and device to improve performances and life, with corrosion reduction, in kettle type carbamate condensers in urea plants |
| 12/10/1991 | US5072039 Feed supplement for ruminants |
| 12/03/1991 | US5070165 Urea-containing (meth)acrylic acid derivatives of triisocyanates-compositions for an artificial tooth |
| 11/19/1991 | CA1292137C Silver halide photosensitive materials for color photography |
| 11/12/1991 | CA1291990C Antiatherosclerotic tetrasubstituted ureas and thioureas |
| 10/30/1991 | EP0454227A1 Process for concentrating urea solutions under vacuum |
| 10/30/1991 | CN1014518B Process of direct synthesis of 4,4-dinitro-tripheryl urea |
| 10/22/1991 | CA1291151C N-benzoyl-n'-3,5-dichloro-4-hexafluoropropyloxy-phenylureas |
| 10/16/1991 | EP0451599A1 Process for the production of N'N-bis((3-aminophenyl)-ureas |
| 10/15/1991 | CA1290756C Quinazolinone derivative and processes for preparing the same |
| 10/10/1991 | DE4011360A1 N,N'-bis:(3-amino phenyl)urea cpds. prodn. |
| 10/08/1991 | CA2037714A1 Process for the production of n,n'-bis-(3-aminophenyl)-ureas |
| 10/02/1991 | CN1014110B Process for preparing benzoylphenylureas |
| 10/01/1991 | US5053538 Process for enhanced urea production |
| 09/25/1991 | EP0447746A1 A method for separating Diphenylurea(DPU) and phenylthiohydantoin-tryptophan (PTH-TRP) allowing unambiguous indentification of TRP in automatic sequence analysis |
| 09/24/1991 | US5051188 Permeation of vapor through a membrane |
| 09/17/1991 | CA1289141C Process for the production of high energy material |
| 09/14/1991 | WO1991013862A1 Derivatives of urea, their preparation and medicaments containing them |
| 09/14/1991 | CA2074365A1 Urea derivatives, their preparation and drugs containing them |
| 09/14/1991 | CA2037772A1 Method for separating diphenylurea (dpu) and phenylthiohydantoin-tryptophan (pth-trp) allowing unambiguous identification of trp in automatic sequence analysis |
| 09/10/1991 | US5047570 Preparation of 2-cyano-3-aminoacrylonitrile derivatives |
| 09/10/1991 | US5047535 For production of multilayer films |
| 09/04/1991 | EP0444504A2 Method of using at least one component of a flue gas |
| 08/29/1991 | DE4006104A1 Utilisation of carbon di:oxide in the synthesis of hydrocarbon(s) - by combustion of hydrocarbon-contg. waste with oxygen, cooling flue gases in waste-heat boiler and cleaning in gas purifier |
| 08/27/1991 | WO1991013054A1 Cycloalkyl-substituted glutaramide antihypertensive agents |
| 08/27/1991 | US5043444 Process for the preparation of asymmetrically substituted ureas |
| 08/27/1991 | CA2073450A1 Cycloalkyl-substituted glutaramide antihypertensive agents |
| 08/13/1991 | CA1287644C Benzoyl-ureas having insecticide activity |
| 08/06/1991 | US5037926 Monomers for dentistry |
| 07/31/1991 | EP0438579A1 New monomeric units obtained from hydroxy fatty acids, for manufacturing plastics. |
| 07/10/1991 | CN1052850A Process for modernization of existing urea plants and plants so obtained urea |
| 07/10/1991 | CN1013076B Process for preparing heterocyclic compounds |
| 07/03/1991 | EP0435220A2 Urethanes from aliphatic fluoroalcohols, isocyanates and carboxylic acids, process for their preparation and their use |
| 07/03/1991 | EP0435008A1 Process and plant for urea production |
| 06/29/1991 | CA2033313A1 Urethanes made from aliphatic fluoro alcohols, isocyanates and carboxylic acids, a process for their preparation and their use |
| 06/26/1991 | EP0433809A1 Difluorophenyl-ureas |
| 06/25/1991 | CA1285168C Light-sensitive silver halide color photographic material |
| 06/13/1991 | DE3940261A1 Prodn. of di:substd. urea herbicides and fungicides, e.g. fenuron - by reacting amine with N-alkyl- or N,N-di:alkyl-urea in presence of corresp. alkyl- or di:alkylamine |
| 06/12/1991 | EP0432135A1 Intermediates for benzoylphenyl ureas |
| 05/29/1991 | CN1051726A Process for preparing pure unsymmetrically disubstituted ureas |
| 05/22/1991 | EP0428022A1 Process for eliminating water from a mixture containing water, carbondioxide and amine |
| 05/22/1991 | EP0427963A1 Process for the preparation of pure asymmetric disubstituted urea |
| 05/11/1991 | CA2028916A1 Process for the preparation of pure, unsymmetrically disubstituted ureas |
| 04/23/1991 | US5010196 Intermediates for local anesthetics, antiarrhythmia agents |
| 04/16/1991 | US5008436 Urea-containing (meth) acrylic acid derivatives of triisocyanates |
| 04/10/1991 | EP0420930A1 Method of synthesis and novel compounds for pharmaceutical uses |
| 03/27/1991 | CN1050184A Urea production process with high energy efficiency |
| 03/27/1991 | CN1050171A Process for purifying effluent from urea production plants |
| 03/20/1991 | EP0417830A1 Urea production process with high energy efficiency |
| 03/20/1991 | EP0417829A1 Process for purifying the effluent from urea production plants |
| 03/13/1991 | EP0416236A2 Process for the isolation isocyanic acid from a gaseous mixture of isocyanic acid and ammonia |
| 03/12/1991 | US4999455 Acrylic derivative of urea |
| 03/12/1991 | US4999381 Fungicides |
| 03/07/1991 | DE3928595A1 Asymmetrically substd. urea(s) prodn. - by passing prim. or sec. amine into hot gaseous mixt. of isocyanic acid and ammonia and cooling reaction mixt. to condense prod. |
| 03/07/1991 | DE3928566A1 Unsymmetrically-substd. urea(s) prepn. - by reaction of prim. or sec. amine with substd. ammonium isocyanate in inert diluent |
| 03/06/1991 | EP0415123A2 1-Phenylalkyl-3-phenylurea derivatives |
| 02/26/1991 | US4996359 Process for the preparation of aromatic bis dialkyl ureas |
| 02/26/1991 | CA1280759C Benzoyl-ureas having acaricide and insecticide activity |
| 02/20/1991 | CN1049334A Process for production of urea from ammonium bicarbonate and ammonia |
| 02/20/1991 | CN1049333A Abstracting alkali of beet from waste fermented liquid of beet sugar |
| 02/19/1991 | US4994611 Process for the production of N,N'-bis-(3-aminophenyl)-ureas |
| 02/19/1991 | CA1280422C Process for the preparation of an n-aromatic-n-acyl urea |
| 02/10/1991 | WO1991002016A1 New monomeric units obtained from hydroxy fatty acids, for manufacturing plastics |
| 02/10/1991 | CA2038941A1 Hydroxyfatty-acid-based monomers for producing plastics |
| 02/06/1991 | EP0411615A1 4-(N-substituted amino)-2-butynyl-1-ureas and thioureas and derivatives thereof as centrally acting muscarinic agents |
| 02/05/1991 | CA2022346A1 1-phenylalkyl-3-phenylurea derivatives |
| 02/03/1991 | CA2022510A1 4-(n-substituted amino)-2-butynyl-1-ureas and thioureas and derivatives thereof as centrally acting muscarinic agents |
| 01/30/1991 | EP0410169A2 Process for the preparation of asymmetrically substituted ureas, carbamates, thiocarbamates and substituted isocyanates |
| 01/30/1991 | EP0410168A2 Process for the preparation of asymmetrically substituted ureas |
| 01/29/1991 | US4988688 Cognitive activators |
| 01/29/1991 | US4988491 Flexible integration of the production of ammonia and urea |
| 01/16/1991 | EP0408211A1 Novel isocyanate prepolymers and secondary amines from disecondary amines and alkyl diisocyanates |
| 01/11/1991 | CA2020344A1 Isocyanate prepolymers and secondary amines from disecondary amines and alkyl diisocyanates |
| 01/09/1991 | EP0406618A2 Process for the preparation of 1,5 naphtylene diisocyanate having urea and biuret groups |
| 01/08/1991 | US4983762 Preparation of biureto polyisocyanates |
| 01/04/1991 | CA2019434A1 Process for the preparation of highly elastic plastics |
| 01/02/1991 | EP0405932A2 Substituted 1,3-Diaminopropanes |
| 01/01/1991 | US4981973 Bronsted acid, ruthenium catalyst |
| 12/31/1990 | CA2020189A1 Substituted 1,3-diaminopropanes |
| 12/25/1990 | US4980500 Process for the preparation of biuret polyisocyanates, the compounds obtained by this process and their use |
| 12/25/1990 | US4980376 Benzoyl-ureas having insecticide activity |
| 12/19/1990 | CN2067601U Jacketing intermittent type reactor |
| 12/19/1990 | CN1047859A Benzocycloalkane derivatives, method of producing same and composition contg.same |
| 12/05/1990 | EP0400383A1 Urea groups containing (meth)-acrylic acid derivativs from triisocyanates and their use |
| 12/05/1990 | EP0400299A1 A method of manufacturing aromatic urethanes |
| 12/04/1990 | CA1277317C Heterocyclic compounds |