FI930377A0 - Reducering kvaeveoxider under anvaendning av ureahydrolysat - Google Patents
Reducering kvaeveoxider under anvaendning av ureahydrolysatInfo
- Publication number
- FI930377A0 FI930377A0 FI930377A FI930377A FI930377A0 FI 930377 A0 FI930377 A0 FI 930377A0 FI 930377 A FI930377 A FI 930377A FI 930377 A FI930377 A FI 930377A FI 930377 A0 FI930377 A0 FI 930377A0
- Authority
- FI
- Finland
- Prior art keywords
- ureahydrolysat
- kvaeveoxider
- reducering
- anvaendning
- hydrolysate
- Prior art date
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract 6
- 239000000413 hydrolysate Substances 0.000 abstract 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 2
- 239000004202 carbamide Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 230000009467 reduction Effects 0.000 abstract 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/08—Preparation of ammonia from nitrogenous organic substances
- C01C1/086—Preparation of ammonia from nitrogenous organic substances from urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/40—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a hydrolysis catalyst
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treating Waste Gases (AREA)
- Polyesters Or Polycarbonates (AREA)
- Cosmetics (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/561,154 US5240688A (en) | 1990-08-01 | 1990-08-01 | Process for the in-line hydrolysis of urea |
PCT/US1991/005461 WO1992002450A1 (en) | 1990-08-01 | 1991-08-01 | Nitrogen oxides reduction using a urea hydrolysate |
Publications (2)
Publication Number | Publication Date |
---|---|
FI930377A0 true FI930377A0 (fi) | 1993-01-29 |
FI930377A FI930377A (fi) | 1993-01-29 |
Family
ID=24240855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI930377A FI930377A (fi) | 1990-08-01 | 1993-01-29 | Reducering kvaeveoxider under anvaendning av ureahydrolysat |
Country Status (8)
Country | Link |
---|---|
US (2) | US5240688A (fi) |
EP (2) | EP0495089B1 (fi) |
AT (2) | ATE134155T1 (fi) |
AU (1) | AU8297991A (fi) |
CA (2) | CA2088576A1 (fi) |
DE (2) | DE69117163T2 (fi) |
FI (1) | FI930377A (fi) |
WO (2) | WO1992002450A1 (fi) |
Families Citing this family (77)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5441713A (en) * | 1988-04-29 | 1995-08-15 | Nalco Fuel Tech | Hardness suppression in urea solutions |
US6051040A (en) * | 1988-12-28 | 2000-04-18 | Clean Diesel Technologies, Inc. | Method for reducing emissions of NOx and particulates from a diesel engine |
US5543123A (en) * | 1990-08-01 | 1996-08-06 | Nalco Fuel Tech | Low pressure formation of a urea hydrolysate for nitrogen oxides reduction |
US5342599A (en) * | 1990-09-14 | 1994-08-30 | Cummins Power Generation, Inc. | Surface stabilized sources of isocyanic acid |
US5281403B1 (en) * | 1991-09-27 | 1996-06-11 | Noell Inc | Method for converting urea to ammonia |
FR2682110B1 (fr) * | 1991-10-02 | 1995-05-24 | Atta | Ligands amphiphiles perfluoroalkyles leurs complexes metalliques et leurs utilisations dans des preparations a usage therapeutique. |
DE59307293D1 (de) * | 1992-02-10 | 1997-10-16 | Man Nutzfahrzeuge Ag | Vorrichtung zur katalytischen NOX-Reduktion |
TW229225B (fi) * | 1992-05-06 | 1994-09-01 | Malco Fuel Tech | |
US5489419A (en) * | 1992-10-13 | 1996-02-06 | Nalco Fuel Tech | Process for pollution control |
US5536482A (en) * | 1992-10-13 | 1996-07-16 | Nalco Fuel Tech | Process for pollution control |
US5404841A (en) * | 1993-08-30 | 1995-04-11 | Valentine; James M. | Reduction of nitrogen oxides emissions from diesel engines |
WO1995009810A1 (en) * | 1993-10-06 | 1995-04-13 | Nalco Fuel Tech | Low pressure formation of a urea hydrolysate for nitrogen oxides reduction |
US5489420A (en) * | 1994-03-10 | 1996-02-06 | Nalco Fuel Tech | Nitrogen oxides reducing agent and a phosphate |
US5658547A (en) * | 1994-06-30 | 1997-08-19 | Nalco Fuel Tech | Simplified efficient process for reducing NOx, SOx, and particulates |
DE4425420A1 (de) * | 1994-07-19 | 1995-07-27 | Daimler Benz Ag | Verfahren zur Verminderung des Gehaltes an Stickstoffoxiden in den Abgasen von Verbrennungskraftmaschinen |
WO1996006672A1 (en) * | 1994-08-26 | 1996-03-07 | Us Sulfamate, Inc. | Molten urea dehydrate derived compositions |
GB9513989D0 (en) * | 1995-07-08 | 1995-09-06 | Brunner Mond & Co Ltd | Treatment of flue gases |
FR2740356B1 (fr) * | 1995-10-31 | 1997-11-28 | Rhone Poulenc Chimie | Procede de traitement de fumees avec du carbonate et/ou du bicarbonate de sodium humidifies |
US5992141A (en) * | 1996-04-02 | 1999-11-30 | Kleen Air Systems, Inc. | Ammonia injection in NOx control |
US5681536A (en) * | 1996-05-07 | 1997-10-28 | Nebraska Public Power District | Injection lance for uniformly injecting anhydrous ammonia and air into a boiler cavity |
US20050019363A1 (en) * | 1996-09-30 | 2005-01-27 | Blount David H. | Hydrolyzed urea condensate fertilizer, fungicide and insecticide |
US6077491A (en) | 1997-03-21 | 2000-06-20 | Ec&C Technologies | Methods for the production of ammonia from urea and/or biuret, and uses for NOx and/or particulate matter removal |
US6361754B1 (en) * | 1997-03-27 | 2002-03-26 | Clean Diesel Technologies, Inc. | Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reduction |
US5976475A (en) * | 1997-04-02 | 1999-11-02 | Clean Diesel Technologies, Inc. | Reducing NOx emissions from an engine by temperature-controlled urea injection for selective catalytic reduction |
US5809775A (en) * | 1997-04-02 | 1998-09-22 | Clean Diesel Technologies, Inc. | Reducing NOx emissions from an engine by selective catalytic reduction utilizing solid reagents |
JPH11171535A (ja) * | 1997-12-05 | 1999-06-29 | Mitsubishi Heavy Ind Ltd | アンモニア発生方法及び排ガス処理方法 |
JP2001523165A (ja) * | 1997-12-12 | 2001-11-20 | エフエーファウ・モトーレンテヒニク・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング・ウント・コンパニー・コマンディトゲゼルシャフト | 酸素を含む排ガス特に内燃機関の排ガス内の窒素酸化物を還元する方法 |
WO1999056858A2 (de) * | 1998-04-30 | 1999-11-11 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zur katalytischen stickoxidminderung |
ITMI981155A1 (it) * | 1998-05-25 | 1999-11-25 | Siirtec Nigi S P A | Processo per la produzione di ammoniaca mediante idrolisi dell'urea |
US6093380A (en) * | 1998-10-16 | 2000-07-25 | Siirtec Nigi, S.P.A. | Method and apparatus for pollution control in exhaust gas streams from fossil fuel burning facilities |
US6403046B1 (en) | 1999-07-26 | 2002-06-11 | Hera, Llc | Pollution control systems using urea and ammonia for the control of emissions from the flue gas of fossil fuel burning facilities |
US6146605A (en) * | 1999-07-26 | 2000-11-14 | Hera, Llc | Combined SCR/SNCR process |
US6511644B1 (en) | 2000-08-28 | 2003-01-28 | The Chemithon Corporation | Method for removing contaminants in reactors |
US6436359B1 (en) | 2000-10-25 | 2002-08-20 | Ec&C Technologies, Inc. | Method for controlling the production of ammonia from urea for NOx scrubbing |
US6761868B2 (en) * | 2001-05-16 | 2004-07-13 | The Chemithon Corporation | Process for quantitatively converting urea to ammonia on demand |
JP3820163B2 (ja) * | 2002-02-22 | 2006-09-13 | 三井化学株式会社 | 尿素濃度測定方法および装置 |
US20030211024A1 (en) * | 2002-05-10 | 2003-11-13 | Wojichowski David Lee | Methods of converting urea to ammonia for SCR, SNCR and flue gas conditioning |
US6887284B2 (en) * | 2002-07-12 | 2005-05-03 | Dannie B. Hudson | Dual homogenization system and process for fuel oil |
KR100498083B1 (ko) * | 2002-08-27 | 2005-07-01 | 강희수 | 원사 빔 적재대 |
US6887449B2 (en) * | 2002-11-21 | 2005-05-03 | The Chemithon Corporation | Method of quantitatively producing ammonia from urea |
BRPI0510234A (pt) * | 2004-05-05 | 2007-10-23 | Robert K Graupner | método e aparelho para gerar energia, método e aparelho para obter uma composição que contém guanidina |
US20080279732A1 (en) * | 2005-02-16 | 2008-11-13 | Imi Vision Limited | Exhaust as Treatment |
US20090107116A1 (en) * | 2005-02-16 | 2009-04-30 | Imi Vision Limited | Exhaust gas treatment |
US7985280B2 (en) * | 2007-02-20 | 2011-07-26 | Hitachi Power Systems America, Ltd. | Separation of aqueous ammonia components for NOx reduction |
US20080267837A1 (en) * | 2007-04-27 | 2008-10-30 | Phelps Calvin E | Conversion of urea to reactants for NOx reduction |
EP2167219A1 (en) * | 2007-07-12 | 2010-03-31 | Powerspan Corp. | Scrubbing of ammonia with urea ammonium nitrate solution |
AU2008293709A1 (en) * | 2007-08-24 | 2009-03-05 | Powerspan Corp | Method and apparatus for producing ammonium carbonate from urea |
US20090148370A1 (en) * | 2007-12-06 | 2009-06-11 | Spencer Iii Herbert W | Process to produce ammonia from urea |
AU2009276754A1 (en) * | 2008-07-29 | 2010-02-04 | Powerspan Corp | Using Raman spectroscopy to control carbonate/bicarbonate concentrations |
US8562929B2 (en) | 2010-04-02 | 2013-10-22 | Ohio University | Selective catalytic reduction via electrolysis of urea |
WO2011123620A1 (en) * | 2010-04-02 | 2011-10-06 | Ohio University | Selective catalytic reduction via electrolysis of urea |
WO2012104205A1 (en) * | 2011-02-04 | 2012-08-09 | Paul Scherrer Institut | Ammonia generator converting liquid ammonia precursor solutions to gaseous ammonia for denox-applications using selective catalytic reduction of nitrogen oxides |
WO2012123380A2 (en) | 2011-03-11 | 2012-09-20 | Puregeneration (Uk) Ltd | Production and use of cyanoguanidine and cyanamide |
US8518354B2 (en) | 2011-07-29 | 2013-08-27 | Deere & Company | Diesel exhaust fluid formulation having a high ammonium content and a low freezing point |
CN102553412A (zh) * | 2012-02-10 | 2012-07-11 | 山东大学 | 一种利用高反应活性氨基还原剂进行烟气脱硝的方法 |
DE102014204307A1 (de) | 2013-03-19 | 2014-09-25 | Ford Global Technologies, Llc | Verfahren und Anordnung zur Behandlung von Abgasen eines Verbrennungsmotors |
EP2926886A1 (en) * | 2014-04-01 | 2015-10-07 | Inergy Automotive Systems Research (Société Anonyme) | System comprising a decomposition unit for use on board of a vehicle |
US9586831B2 (en) | 2014-06-09 | 2017-03-07 | Wahlco, Inc. | Urea to ammonia process |
CN104477939B (zh) * | 2014-10-28 | 2017-01-18 | 河南骏化发展股份有限公司 | 一种低压水解工艺 |
CN106807193A (zh) * | 2015-12-02 | 2017-06-09 | 昆山市三维换热器有限公司 | 一种烟气脱硝工艺*** |
US10844763B2 (en) | 2017-03-10 | 2020-11-24 | R. F. Macdonald Co. | Process for direct urea injection with selective catalytic reduction (SCR) for NOx reduction in hot gas streams and related systems and assemblies |
CN106986434B (zh) * | 2017-04-20 | 2022-12-02 | 中国科学院生态环境研究中心 | 一种抗生素生产废水的预处理方法 |
US10767529B2 (en) | 2018-11-08 | 2020-09-08 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system having onboard ammonia reactor with heated doser |
US10683787B2 (en) | 2018-11-08 | 2020-06-16 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system having onboard ammonia reactor with hybrid heating |
US10876454B2 (en) | 2018-11-08 | 2020-12-29 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system with multi-reductant injection and doser controls |
US11193413B2 (en) | 2019-12-12 | 2021-12-07 | Faurecia Emissions Control Technologies, Usa, Llc | Exhaust aftertreatment system with virtual temperature determination and control |
CN111135714A (zh) * | 2020-01-15 | 2020-05-12 | 安徽晨晰洁净科技有限公司 | 一种碳酸氢铵作为scr脱硝还原剂的方法 |
US11319853B2 (en) | 2020-03-31 | 2022-05-03 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system with doser |
US11022014B1 (en) | 2020-04-28 | 2021-06-01 | Faurecia Emissions Control Technologies, Usa, Llc | Exhaust aftertreatment system with heated flash-boiling doser |
US11511239B2 (en) | 2020-04-29 | 2022-11-29 | Faurecia Emissions Control Technologies, Usa, Llc | Heated flash-boiling doser with integrated helix |
US11092054B1 (en) | 2020-04-29 | 2021-08-17 | Faurecia Emissions Control Technologies, Usa, Llc | Flash-boiling doser with thermal transfer helix |
US11384667B2 (en) | 2020-05-29 | 2022-07-12 | Faurecia Emissions Control Technologies, Usa, Llc | Exhaust aftertreatment system with heated dosing control |
US11225894B1 (en) | 2020-06-30 | 2022-01-18 | Faurecia Emissions Control Technologies, Usa, Llc | Exhaust aftertreatment system with thermally controlled reagent doser |
CN112354487B (zh) * | 2020-11-06 | 2022-10-14 | 李东田 | 一种碳酸铵原料气的制备方法 |
CN112661172A (zh) * | 2020-12-23 | 2021-04-16 | 中国华电科工集团有限公司 | 一种scr脱硝尿素非均相催化水解制氨的***及方法 |
CN114405450A (zh) * | 2022-02-23 | 2022-04-29 | 西安热工研究院有限公司 | 一种填料式的尿素催化水解装置 |
CN115057454B (zh) * | 2022-06-28 | 2023-06-23 | 江苏国瑞特环保工程技术有限公司 | 一种强碱性环境改良型尿素水解制氨*** |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE200617C (fi) * | ||||
US3900554A (en) * | 1973-03-16 | 1975-08-19 | Exxon Research Engineering Co | Method for the reduction of the concentration of no in combustion effluents using ammonia |
US4208386A (en) * | 1976-03-03 | 1980-06-17 | Electric Power Research Institute, Inc. | Urea reduction of NOx in combustion effluents |
JPS5314662A (en) * | 1976-07-28 | 1978-02-09 | Hitachi Ltd | Method for decreasing nitrogen oxides concentration of combustion exhaust gas |
US4087513A (en) * | 1977-08-12 | 1978-05-02 | Olin Corporation | Method of hydrolyzing urea contained in waste water streams |
US4325924A (en) * | 1977-10-25 | 1982-04-20 | Electric Power Research Institute, Inc. | Urea reduction of NOx in fuel rich combustion effluents |
JPS5486020A (en) * | 1977-12-21 | 1979-07-09 | Okubo Yoshinori | Combustion method of hydrocarbon fuel |
US4168299A (en) * | 1978-03-20 | 1979-09-18 | Olin Corporation | Catalytic method for hydrolyzing urea |
NL8102391A (nl) * | 1981-05-15 | 1982-12-01 | Unie Van Kunstmestfab Bv | Werkwijze voor het winnen van waardevolle bestanddelen uit de afvalstromen verkregen bij de ureumbereiding. |
NL8105027A (nl) * | 1981-11-06 | 1983-06-01 | Stamicarbon | Werkwijze voor het omzetten in ammoniak en kooldioxide van gasvormige verbindingen die stikstof- en koolstofatomen bevatten. |
US4626417A (en) * | 1983-09-29 | 1986-12-02 | Union Oil Company Of California | Methods for chemically reducing nitrogen oxides |
US4777024A (en) * | 1987-03-06 | 1988-10-11 | Fuel Tech, Inc. | Multi-stage process for reducing the concentration of pollutants in an effluent |
US4780289A (en) * | 1987-05-14 | 1988-10-25 | Fuel Tech, Inc. | Process for nitrogen oxides reduction and minimization of the production of other pollutants |
JPS6419665A (en) * | 1987-07-14 | 1989-01-23 | Jeol Ltd | Ion beam device |
WO1989007004A1 (en) * | 1988-02-02 | 1989-08-10 | Dale Gordon Jones | Process and apparatus using two-stage boiler injection for reduction of oxides of nitrogen |
AT390208B (de) * | 1988-05-09 | 1990-04-10 | Waagner Biro Ag | Verfahren zur entfernung von stickoxiden |
DE3830045C2 (de) * | 1988-09-03 | 1993-09-30 | Bayer Ag | Verfahren zur Reduktion von in Abgasen enthaltenen Stickoxiden mittels eines zeolithhaltigen Katalysators |
JPH02191528A (ja) * | 1989-01-20 | 1990-07-27 | Babcock Hitachi Kk | 固体還元剤を用いた脱硝装置 |
US4987513A (en) * | 1989-04-12 | 1991-01-22 | Shelley Edwin F | Apparatus and method for selectively delaying the connection of an electrical supply voltage to an electrical load |
US4997631A (en) * | 1990-03-07 | 1991-03-05 | Fuel Tech, Inc. | Process for reducing nitrogen oxides without generating nitrous oxide |
-
1990
- 1990-08-01 US US07/561,154 patent/US5240688A/en not_active Expired - Fee Related
-
1991
- 1991-08-01 WO PCT/US1991/005461 patent/WO1992002450A1/en active IP Right Grant
- 1991-08-01 DE DE69117163T patent/DE69117163T2/de not_active Expired - Fee Related
- 1991-08-01 CA CA002088576A patent/CA2088576A1/en not_active Abandoned
- 1991-08-01 WO PCT/EP1991/001450 patent/WO1992002291A1/en active IP Right Grant
- 1991-08-01 AT AT91916169T patent/ATE134155T1/de not_active IP Right Cessation
- 1991-08-01 AT AT91913756T patent/ATE129925T1/de not_active IP Right Cessation
- 1991-08-01 DE DE69114503T patent/DE69114503T2/de not_active Expired - Fee Related
- 1991-08-01 CA CA002063811A patent/CA2063811C/en not_active Expired - Fee Related
- 1991-08-01 EP EP91916169A patent/EP0495089B1/en not_active Expired - Lifetime
- 1991-08-01 EP EP91913756A patent/EP0542792B1/en not_active Expired - Lifetime
- 1991-08-01 AU AU82979/91A patent/AU8297991A/en not_active Abandoned
-
1992
- 1992-02-26 US US07/820,907 patent/US5399325A/en not_active Expired - Fee Related
-
1993
- 1993-01-29 FI FI930377A patent/FI930377A/fi not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP0495089A1 (en) | 1992-07-22 |
CA2063811A1 (en) | 1992-02-02 |
DE69114503D1 (de) | 1995-12-14 |
WO1992002450A1 (en) | 1992-02-20 |
CA2088576A1 (en) | 1992-02-02 |
DE69117163T2 (de) | 1996-09-05 |
WO1992002291A1 (en) | 1992-02-20 |
ATE134155T1 (de) | 1996-02-15 |
DE69114503T2 (de) | 1996-05-02 |
EP0542792B1 (en) | 1995-11-08 |
US5240688A (en) | 1993-08-31 |
US5399325A (en) | 1995-03-21 |
ATE129925T1 (de) | 1995-11-15 |
CA2063811C (en) | 2000-05-09 |
EP0495089B1 (en) | 1996-02-14 |
FI930377A (fi) | 1993-01-29 |
AU8297991A (en) | 1992-03-02 |
DE69117163D1 (de) | 1996-03-28 |
EP0542792A1 (en) | 1993-05-26 |
EP0495089A4 (en) | 1993-03-10 |
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