ATE168759T1 - Verbrennungsanlage mit vermindertem ausstoss von stickstoffoxiden - Google Patents

Verbrennungsanlage mit vermindertem ausstoss von stickstoffoxiden

Info

Publication number
ATE168759T1
ATE168759T1 AT92902517T AT92902517T ATE168759T1 AT E168759 T1 ATE168759 T1 AT E168759T1 AT 92902517 T AT92902517 T AT 92902517T AT 92902517 T AT92902517 T AT 92902517T AT E168759 T1 ATE168759 T1 AT E168759T1
Authority
AT
Austria
Prior art keywords
combustion
nitrogen oxide
oxide emissions
combustion plant
reduced nitrogen
Prior art date
Application number
AT92902517T
Other languages
English (en)
Inventor
Janos M Beer
Alessandro Marotta
Majed A Toqan
Original Assignee
Massachusetts Inst Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Massachusetts Inst Technology filed Critical Massachusetts Inst Technology
Application granted granted Critical
Publication of ATE168759T1 publication Critical patent/ATE168759T1/de

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00Combustion apparatus characterised by arrangements for air supply
    • F23C7/002Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F23C7/004Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • F23C7/006Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes adjustable
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00Staged combustion
    • F23C2201/20Burner staging
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00Fluegas recirculation
    • F23C2202/20Premixing fluegas with fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00Fluegas recirculation
    • F23C2202/30Premixing fluegas with combustion air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/06043Burner staging, i.e. radially stratified flame core burners

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
AT92902517T 1990-10-05 1991-10-07 Verbrennungsanlage mit vermindertem ausstoss von stickstoffoxiden ATE168759T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59367990A 1990-10-05 1990-10-05
US77173991A 1991-10-04 1991-10-04

Publications (1)

Publication Number Publication Date
ATE168759T1 true ATE168759T1 (de) 1998-08-15

Family

ID=27081766

Family Applications (1)

Application Number Title Priority Date Filing Date
AT92902517T ATE168759T1 (de) 1990-10-05 1991-10-07 Verbrennungsanlage mit vermindertem ausstoss von stickstoffoxiden

Country Status (6)

Country Link
US (1) US5411394A (de)
EP (1) EP0550700B1 (de)
AT (1) ATE168759T1 (de)
CA (1) CA2093316C (de)
DE (1) DE69129858T2 (de)
WO (1) WO1992006328A1 (de)

Families Citing this family (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333574A (en) * 1991-09-11 1994-08-02 Mark Iv Transportation Products Corporation Compact boiler having low NOX emissions
DE4217879A1 (de) * 1992-05-29 1993-12-02 Babcock Energie Umwelt Brenner für staubförmigen Brennstoff
EP0599395A1 (de) * 1992-11-20 1994-06-01 WITTEVEEN, Gustaaf Jan Brenner mit niedrigem NOx-Ausstoss
US5511971A (en) * 1993-08-23 1996-04-30 Benz; Robert P. Low nox burner process for boilers
USRE36373E (en) * 1993-08-23 1999-11-02 Benz; Robert P. Low NOx burner process for boilers
US5426933A (en) * 1994-01-11 1995-06-27 Solar Turbines Incorporated Dual feed injection nozzle with water injection
US5560305A (en) * 1994-12-15 1996-10-01 The Boc Group, Inc. Burner block and method for furnace
DE19527083A1 (de) * 1995-07-25 1997-01-30 Lentjes Kraftwerkstechnik Verfahren und Brenner zur Verminderung der Bildung von NO¶x¶ bei der Verbrennung von Kohlenstaub
DE19536672A1 (de) * 1995-09-30 1997-04-03 Abb Research Ltd Verfahren und Vorrichtung zur Verbrennung von Brennstoffen
JP3239142B2 (ja) 1996-06-19 2001-12-17 アルストム パワー インコーポレイテッド 放射状層化火炎中心バーナの制御を行う方法
US5829369A (en) * 1996-11-12 1998-11-03 The Babcock & Wilcox Company Pulverized coal burner
DE59708821D1 (de) * 1997-03-18 2003-01-09 Alstom Switzerland Ltd Kesselanlage für eine Wärmeerzeugung
US6007326A (en) * 1997-08-04 1999-12-28 Praxair Technology, Inc. Low NOx combustion process
FR2772118B1 (fr) * 1997-12-05 2001-08-17 Saint Gobain Vitrage Procede de combustion et bruleur a pulverisation de combustible mettant en oeuvre un tel procede
EP0931979A1 (de) * 1998-01-23 1999-07-28 DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- Vorrichtung zur Unterdrückung von Flammen-/Druckschwingungen bei einer Feuerung insbesondere einer Gasturbine
JP3343855B2 (ja) * 1998-01-30 2002-11-11 株式会社日立製作所 微粉炭燃焼バーナ及び微粉炭燃焼バーナの燃焼方法
US20080286704A1 (en) * 1998-11-18 2008-11-20 Hermann Bruggendick Method of burning a nitrogen-containing fuel
WO2001013042A1 (fr) * 1999-08-16 2001-02-22 Nippon Furnace Kogyo Kaisha, Ltd. Appareil et procede d'alimentation en carburant
US6383461B1 (en) * 1999-10-26 2002-05-07 John Zink Company, Llc Fuel dilution methods and apparatus for NOx reduction
US6453830B1 (en) * 2000-02-29 2002-09-24 Bert Zauderer Reduction of nitrogen oxides by staged combustion in combustors, furnaces and boilers
AU2001249639A1 (en) 2000-03-31 2001-10-15 Aqua-Chem Inc. Low pollution emission burner
EP1219895A1 (de) * 2000-12-28 2002-07-03 Oertli Induflame AG Verbrennungsverfahren mit reduziertem Stickoxidausstoss
US6699029B2 (en) 2001-01-11 2004-03-02 Praxair Technology, Inc. Oxygen enhanced switching to combustion of lower rank fuels
US20020127505A1 (en) 2001-01-11 2002-09-12 Hisashi Kobayashi Oxygen enhanced low nox combustion
US6702569B2 (en) 2001-01-11 2004-03-09 Praxair Technology, Inc. Enhancing SNCR-aided combustion with oxygen addition
US6699030B2 (en) 2001-01-11 2004-03-02 Praxair Technology, Inc. Combustion in a multiburner furnace with selective flow of oxygen
US6699031B2 (en) 2001-01-11 2004-03-02 Praxair Technology, Inc. NOx reduction in combustion with concentrated coal streams and oxygen injection
US6551098B2 (en) * 2001-02-22 2003-04-22 Rheem Manufacturing Company Variable firing rate fuel burner
US6908298B1 (en) 2001-10-30 2005-06-21 Owen W. Dykema Air-fuel injection system for stable combustion
FR2837263B1 (fr) * 2002-03-12 2004-09-24 Air Liquide Procede de mise en oeuvre d'une chaudiere de recuperation de chaleur
MXPA04011343A (es) * 2002-05-15 2005-02-14 Praxair Technology Inc Composicion baja en nox.
EP1504219B1 (de) 2002-05-15 2016-08-10 Praxair Technology, Inc. Verbrennung mit vermindertem kohlenstoff in der asche
US20030234455A1 (en) * 2002-06-24 2003-12-25 Mieney Harry R. Non-contacting fuel vaporizer
US6907724B2 (en) * 2002-09-13 2005-06-21 The Boeing Company Combined cycle engines incorporating swirl augmented combustion for reduced volume and weight and improved performance
US6895756B2 (en) * 2002-09-13 2005-05-24 The Boeing Company Compact swirl augmented afterburners for gas turbine engines
US6968695B2 (en) * 2002-09-13 2005-11-29 The Boeing Company Compact lightweight ramjet engines incorporating swirl augmented combustion with improved performance
US6820411B2 (en) * 2002-09-13 2004-11-23 The Boeing Company Compact, lightweight high-performance lift thruster incorporating swirl-augmented oxidizer/fuel injection, mixing and combustion
AU2004205796B2 (en) * 2003-01-21 2009-02-26 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for oxygen enrichment in fuel conveying gases
US7163392B2 (en) * 2003-09-05 2007-01-16 Feese James J Three stage low NOx burner and method
US7484956B2 (en) * 2003-09-16 2009-02-03 Praxair Technology, Inc. Low NOx combustion using cogenerated oxygen and nitrogen streams
DE102004003343A1 (de) * 2004-01-22 2005-08-11 Linde Ag Flexibler Parallelstrombrenner mit Drallkammer
US20050227195A1 (en) * 2004-04-08 2005-10-13 George Kenneth R Combustion burner assembly having low oxides of nitrogen emission
US7168947B2 (en) * 2004-07-06 2007-01-30 General Electric Company Methods and systems for operating combustion systems
US7264466B2 (en) * 2004-09-10 2007-09-04 North American Manufacturing Company Method and apparatus for radiant tube combustion
US7766649B2 (en) * 2005-03-07 2010-08-03 Gas Technology Institute Multi-ported, internally recuperated burners for direct flame impingement heating applications
JP2008534862A (ja) * 2005-04-05 2008-08-28 サーガス・エーエス 低co2火力発電プラント
US20060275724A1 (en) * 2005-06-02 2006-12-07 Joshi Mahendra L Dynamic burner reconfiguration and combustion system for process heaters and boilers
US7430970B2 (en) * 2005-06-30 2008-10-07 Larue Albert D Burner with center air jet
US20070269755A2 (en) * 2006-01-05 2007-11-22 Petro-Chem Development Co., Inc. Systems, apparatus and method for flameless combustion absent catalyst or high temperature oxidants
US20120266792A1 (en) * 2006-05-17 2012-10-25 Majed Toqan Combustion Stabilization Systems
US8215949B2 (en) * 2006-05-17 2012-07-10 Majed Toqan Combustion stabilization systems
FR2903479A1 (fr) * 2006-07-06 2008-01-11 Air Liquide Bruleur a flamme orientable et procede de mise en oeuvre
US20080128547A1 (en) * 2006-12-05 2008-06-05 Pratt & Whitney Rocketdyne, Inc. Two-stage hypersonic vehicle featuring advanced swirl combustion
US7762077B2 (en) * 2006-12-05 2010-07-27 Pratt & Whitney Rocketdyne, Inc. Single-stage hypersonic vehicle featuring advanced swirl combustion
US7690192B2 (en) 2007-04-17 2010-04-06 Pratt & Whitney Rocketdyne, Inc. Compact, high performance swirl combustion rocket engine
US7762058B2 (en) * 2007-04-17 2010-07-27 Pratt & Whitney Rocketdyne, Inc. Ultra-compact, high performance aerovortical rocket thruster
EP2080952A1 (de) * 2008-01-17 2009-07-22 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Brenner und Verfahren zur abwechselnden Durchführung von Sauerstoffverbrennung und Luftverbrennung
US7775791B2 (en) * 2008-02-25 2010-08-17 General Electric Company Method and apparatus for staged combustion of air and fuel
EP2107311A1 (de) * 2008-04-01 2009-10-07 Siemens Aktiengesellschaft Größenskalierung eines Brenners
WO2009136366A2 (en) * 2008-05-05 2009-11-12 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Device and method of combusting solid fuel with oxygen
US20100035193A1 (en) * 2008-08-08 2010-02-11 Ze-Gen, Inc. Method and system for fuel gas combustion, and burner for use therein
US20100077942A1 (en) * 2008-09-26 2010-04-01 Air Products And Chemicals, Inc. Oxy/fuel combustion system with little or no excess oxygen
EP2326878A2 (de) * 2008-09-26 2011-06-01 Air Products and Chemicals, Inc. Verbrennungssystem mit vorbrennkammer mit rückgeführtem rauchgas
DE102009014223A1 (de) * 2009-03-25 2010-09-30 Hitachi Power Europe Gmbh Feuerungssystem eines für den Oxyfuel-Betrieb ausgelegten Dampferzeugers
US20100281869A1 (en) * 2009-05-06 2010-11-11 Mark Allan Hadley Airblown Syngas Fuel Nozzle With Diluent Openings
US20100281872A1 (en) * 2009-05-06 2010-11-11 Mark Allan Hadley Airblown Syngas Fuel Nozzle With Diluent Openings
US8607570B2 (en) * 2009-05-06 2013-12-17 General Electric Company Airblown syngas fuel nozzle with diluent openings
US20110045420A1 (en) * 2009-08-21 2011-02-24 Alstom Technology Ltd Burner monitor and control
JP5717754B2 (ja) * 2009-11-26 2015-05-13 リンデ アクチエンゲゼルシャフトLinde Aktiengesellschaft 高炉熱風炉を加熱する方法
MY185043A (en) * 2011-01-31 2021-04-30 Ihi Corp Burner device for high-temparature air combustion
DE102011011207A1 (de) * 2011-02-14 2012-08-16 Air Liquide Deutschland Gmbh Brenner zum gleichmäßigen Erwärmen eines langen Ofens
EP2500640A1 (de) 2011-03-16 2012-09-19 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Verbrennungsverfahren mit niedrigen NOx-Werten und Brenner dafür
US8920159B2 (en) * 2011-11-23 2014-12-30 Honeywell International Inc. Burner with oxygen and fuel mixing apparatus
US20130327050A1 (en) * 2012-06-07 2013-12-12 General Electric Company Controlling flame stability of a gas turbine generator
US10215412B2 (en) * 2012-11-02 2019-02-26 General Electric Company System and method for load control with diffusion combustion in a stoichiometric exhaust gas recirculation gas turbine system
US9909755B2 (en) * 2013-03-15 2018-03-06 Fives North American Combustion, Inc. Low NOx combustion method and apparatus
CN103272728B (zh) * 2013-06-09 2017-01-25 潍柴动力股份有限公司 Scr系统及其尿素喷头
EP2821699A1 (de) * 2013-07-02 2015-01-07 Haldor Topsøe A/S Mischen von Zirkulationsgas mit Brenngas zu einem Brenner
US10281140B2 (en) 2014-07-15 2019-05-07 Chevron U.S.A. Inc. Low NOx combustion method and apparatus
WO2016046074A1 (en) 2014-09-26 2016-03-31 Innecs B.V. Burner
US10274194B2 (en) * 2014-12-19 2019-04-30 Utilization Technology Development, Nfp Methods and systems for reducing emissions of nitrogen oxides from ribbon burners
FR3039254B1 (fr) * 2015-07-24 2021-10-08 Snecma Chambre de combustion comportant des dispositifs d'injection additionnels debouchant directement dans les zones de recirculation de coin, turbomachine la comprenant, et procede d'alimentation en carburant de celle-ci
WO2019147963A1 (en) * 2018-01-26 2019-08-01 Quest Engines, LLC Method and apparatus for producing stratified streams
CN108507917B (zh) * 2018-04-20 2021-12-03 南京恒瑞环保科技有限公司 转炉一次烟气除尘系统除尘能力的检测方法
US11866361B2 (en) * 2019-10-29 2024-01-09 Honeywell International Inc. Fuel gas and oxygen burner
US10845052B1 (en) 2019-12-20 2020-11-24 Jupiter Oxygen Corporation Combustion system comprising an annular shroud burner

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515845A (en) * 1946-06-25 1950-07-18 Shell Dev Flame pocket fluid fuel burner
FR1094871A (fr) * 1959-01-22 1955-05-25 Thomson Houston Comp Francaise Perfectionnements aux appareils de combustion à combustible injecté
US3576384A (en) * 1968-11-29 1971-04-27 British American Oil Co Multinozzle system for vortex burners
DE2724532A1 (de) * 1977-05-31 1978-12-14 Peabody Environmental Systems Brennervorrichtung fuer oel und/oder gas
SU817383A1 (ru) * 1977-10-18 1981-03-30 Kotler Vladlen R Способ сжигани твердого топлива
US4270895A (en) * 1978-06-29 1981-06-02 Foster Wheeler Energy Corporation Swirl producer
DE2933040B1 (de) * 1979-08-16 1980-12-11 Steinmueller Gmbh L & C Verfahren zum Zuenden einer Kohlenstaub-Rundbrennerflamme
DE2933060B1 (de) * 1979-08-16 1980-10-30 Steinmueller Gmbh L & C Brenner zur Verbrennung von staubfoermigen Brennstoffen
US4845940A (en) * 1981-02-27 1989-07-11 Westinghouse Electric Corp. Low NOx rich-lean combustor especially useful in gas turbines
US4422391A (en) * 1981-03-12 1983-12-27 Kawasaki Jukogyo Kabushiki Kaisha Method of combustion of pulverized coal by pulverized coal burner
DE3125901A1 (de) * 1981-07-01 1983-01-20 Deutsche Babcock Ag, 4200 Oberhausen Brenner zum verbrennen von staubfoermigen brennstoffen
US4523530A (en) * 1982-02-26 1985-06-18 Sumitomo Metal Industries, Ltd. Powdery coal burner
US4407205A (en) * 1982-04-30 1983-10-04 Beaufrere Albert H Regeneratively cooled coal combustor/gasifier with integral dry ash removal
US4569295A (en) * 1983-01-18 1986-02-11 Stubinen Utveckling Ab Process and a means for burning solid fuels, preferably coal, turf or the like, in pulverized form
JPS60174408A (ja) * 1984-02-20 1985-09-07 Kawasaki Heavy Ind Ltd 燃焼室の2段燃焼用空気孔
JPS60226609A (ja) * 1984-04-23 1985-11-11 Babcock Hitachi Kk 燃焼装置
US4539918A (en) * 1984-10-22 1985-09-10 Westinghouse Electric Corp. Multiannular swirl combustor providing particulate separation
US4604052A (en) * 1985-04-29 1986-08-05 The United States Of America As Represented By The United States Department Of Energy Dual-water mixture fuel burner
FR2581444B1 (fr) * 1985-05-03 1988-11-10 Charbonnages De France Procede pour la combustion de combustibles fluides et bruleur a turbulence adapte a sa mise en oeuvre
DE3766374D1 (de) * 1986-01-08 1991-01-10 Hitachi Ltd Verfahren und vorrichtung zur verbrennung eines kohlenstaub-wassergemisches.
US4915619A (en) * 1988-05-05 1990-04-10 The Babcock & Wilcox Company Burner for coal, oil or gas firing
US4927352A (en) * 1988-07-19 1990-05-22 Landy Chung Boiler furnace air register

Also Published As

Publication number Publication date
US5411394A (en) 1995-05-02
CA2093316C (en) 2002-12-03
DE69129858D1 (de) 1998-08-27
EP0550700B1 (de) 1998-07-22
CA2093316A1 (en) 1992-04-06
WO1992006328A1 (en) 1992-04-16
EP0550700A1 (de) 1993-07-14
DE69129858T2 (de) 1998-12-03
EP0550700A4 (en) 1993-08-25

Similar Documents

Publication Publication Date Title
ATE168759T1 (de) Verbrennungsanlage mit vermindertem ausstoss von stickstoffoxiden
SE8803242D0 (sv) Bimodal swirler injector for a gas turbine combustor
US4445339A (en) Wingtip vortex flame stabilizer for gas turbine combustor flame holder
MX172404B (es) Metodo para someter a combustion un combustible que contiene nitrogeno unido
DK229786D0 (da) Fremgangsmaade og apparat til forbraending af flydende og/eller fast braendsel i pulveriseret form
GB1529808A (en) Fuel-water vapour premix for low nox burning
SE9304194L (sv) Bränslespridare
EP0018123A3 (de) Brennersystem mit Luftvormischung für Gase von sowohl niedrigem als auch hohem Heizwert
Toqan et al. Low NOx emission from radially stratified natural gas-air turbulent diffusion flames
SE8104982L (sv) Forbrenningsutrustning
WO1993009384A1 (en) Asymmetric whirl combustion
JPS5239007A (en) Combustor used for a gas turbine
JPS5819926B2 (ja) バ−ナ装置のタ−ンダウン比増大方法
ALKAIBE et al. The influence of fuel placement on NO (x) emissions from flames stabilised by radial swirlers
JPS5650211A (en) Internal combustion engine and exhaust gas combusting apparatus
JPS53109233A (en) Low nox combustion system
SPADACCINI et al. Influence of aerodynamic phenomena on pollutant formation in combustion(Phase 1: Gaseous fuels)[Final Report, Apr. 1975- May 1976]
Fu et al. Coflow jets with large velocity difference--a new aerodynamic principle of flame stabilization and combustion intensification.
SU1270491A1 (ru) Способ сжигани газообразного топлива
Reddy Effect of swirl on fuel variability in gas turbine combustors
Karim et al. An experimental investigation of the height of gaseous diffusion flames in a concentric stream of air or premixed air and fuel
DE3661106D1 (en) Process and burner for combusting liquid fuel
Yegian Scaling the weak-swirl burner from 15 kW to 1 MW
JPS56117013A (en) Gas combustor
ENGLEMAN et al. Mechanism and kinetics of the formation of NOx and other combustion pollutants. Phase 2: Modified combustion[Final Report, Feb. 1974- Dec. 1975]

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties