EP2666845A1 - Appareil de production de gaz - Google Patents

Appareil de production de gaz Download PDF

Info

Publication number
EP2666845A1
EP2666845A1 EP12169260.2A EP12169260A EP2666845A1 EP 2666845 A1 EP2666845 A1 EP 2666845A1 EP 12169260 A EP12169260 A EP 12169260A EP 2666845 A1 EP2666845 A1 EP 2666845A1
Authority
EP
European Patent Office
Prior art keywords
zone
carbonaceous material
char
receptacle
gas
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP12169260.2A
Other languages
German (de)
English (en)
Inventor
Murat Dogru
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP12169260.2A priority Critical patent/EP2666845A1/fr
Publication of EP2666845A1 publication Critical patent/EP2666845A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/32—Devices for distributing fuel evenly over the bed or for stirring up the fuel bed
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/34—Grates; Mechanical ash-removing devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
    • C10J3/60—Processes
    • C10J3/64—Processes with decomposition of the distillation products
    • C10J3/66—Processes with decomposition of the distillation products by introducing them into the gasification zone
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0903—Feed preparation
    • C10J2300/0909—Drying
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0916—Biomass
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/094—Char
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0956—Air or oxygen enriched air
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0973—Water
    • C10J2300/0976—Water as steam
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
    • C10J2300/1637—Char combustion

Definitions

  • the present invention relates to a gas producing apparatus, and relates particularly, but not exclusively, to a gas producing apparatus for producing flammable gases from carbonaceous combustible wastes and biomasses.
  • Gas producing apparatus are known for the production of flammable synthesis gases via thermochemical flaming pyrolysis (i.e. thermal decomposition of organic molecules), partial oxidation and gasification of combustible organic material such as biomass materials and combustible domestic and industrial wastes.
  • the resulting raw gases produced by the gas producer are then cooled and cleaned and used for the production of energy in the form of electrical power and heat by means of gas engine generators, dual fuel converted diesel engine generators, gas, steam or oil turbines and high temperature fuel cells.
  • the cooled and cleaned gasses can also be converted to liquid fuels such as methanol, ethanol, ammonia and FT-diesel by means of processing in catalytic converters.
  • Pyrolysis and gasification of biomass or waste materials using sub-stoichiometric oxygen in air as an oxidising agent can generate a high yield of clean product gas known as producer gas or synthesis gas.
  • Pyrolysis consists of thermochemical decomposition of carbon based compounds to produce char, tar and volatile compounds.
  • a continuous operation catalytic gasifier is disclosed in WO 2005/047435 .
  • this arrangement suffers from the disadvantage that the perforated catalytic element can become blocked with deposition of carbon soot particles at the surface of catalyst whilst raw gas is passing through, limiting the extent to which the apparatus can be used continuously.
  • large clinkers formed due to fused ash and char in the high temperature zone accumulate in the bottom of the gasifier over a period of operation time which then causes bridge formation, blocking the continuous fuel movement in the reactor and ash/char extraction from the gasifier.
  • Preferred embodiments of the present invention seek to overcome one or more of the above disadvantages of the prior art.
  • a gas production apparatus comprising:- at least one receptacle for receiving and processing at least one first carbonaceous material passing therethrough, at least one said receptacle defining (i) at least one respective first zone in which at least one said first carbonaceous material is heated in the presence of oxygen to generate at least one volatile gas and at least one second carbonaceous material, and (ii) at least one respective second zone in which at least one said second carbonaceous material is at least partially combusted to generate at least one volatile gas and char; first oxygen containing material introducing means for introducing at least one oxygen containing material into at least one said first zone; first agitator means for agitating at least some of said first and/or second carbonaceous material in at least one said first zone; at least one gas outlet for enabling at least partial removal of at least one said volatile gas from at least one said receptacle; second oxygen containing material introducing means for introducing at least one oxygen containing material into at least one said second zone; and
  • first agitator means for agitating at least some of said first and/or second carbonaceous material in at least one said first zone, this provides the advantage of simplifying the construction of the apparatus, thereby reducing its cost, while also reducing the formation of fuel bridges, thereby enabling the apparatus to be operated continuously for longer periods, thereby increasing the efficiency of operation of the apparatus.
  • this reduces the tar content of the resulting gas, as a result of which maintenance costs of gas and water cleanup downstream equipment and power generating apparatus using the resultant gas can be reduced.
  • second agitator means for mechanically reducing the size of char particles formed in at least one said second zone, this provides the advantage of minimising material blockage in said receptacle, thereby enabling the apparatus to be operated continuously for longer periods. This in turn reduces the tar content of the resulting gas.
  • the first oxygen containing material introducing means may be adapted to introduce fluid containing oxygen through at least one said agitation member.
  • At least one said gas outlet may be arranged between at least one said first zone and at least one said second zone.
  • At least one said receptacle may be arranged such that at least one said first carbonaceous material and/or at least one said second carbonaceous material and/or said char move therethrough under gravity.
  • Said first agitator means may comprise at least one agitation member adapted to be rotated relative to a body of a respective said receptacle.
  • This provides the advantage of enabling more simple and compact construction of the apparatus, by enabling the agitation member to also assist in causing the first and/or second carbonaceous material to pass through the receptacle.
  • the second agitator means may comprise at least one pair of rotating members adapted to engage material therebetween.
  • the second oxygen containing material introducing means may be mounted to said second agitator means.
  • the second oxygen containing material introducing means may include a plurality of fluid introducing members mounted to at least one said rotating member of at least one said pair.
  • the apparatus may further comprise removal means for removing char and/or ash generated in at least one said second zone.
  • This provides the advantage of enabling the apparatus to be used continuously for longer periods.
  • At least one said receptacle may define at least one third zone for drying at least one said first carbonaceous material before entry thereof into at least one said first zone.
  • At least one said receptacle may define inner and outer walls having a gap therebetween.
  • This provides the advantage of enabling the introduction of temperature control or cooling fluid, thereby enabling the temperature of reactions inside the receptacle and exit gas to be controlled, thereby enabling efficiency of operation of the apparatus to be controlled.
  • a method of producing gas comprising:
  • the method may further comprise removing char and/or ash generated in at least one said second zone.
  • the method may further comprise drying at least one said first carbonaceous material in at least one third zone prior to entry of said first carbonaceous material into at least one said first zone.
  • Figure 1 is a schematic side cross sectional view of a gas producing apparatus embodying the present invention.
  • a gas producing apparatus 2 embodying the present invention includes a receptacle 4 comprising an upper part 6 mounted to a lower part 8.
  • the upper part 6 includes a fuel hopper 10 for feeding carbonaceous material such as biomass and/or organic waste material into an upper body 12 via a gate valve 14.
  • a first agitator comprises a stirrer device 16 having blades 18 and an axle 20 mounted via bearings 22 to an upper part 24 of the upper body 12.
  • the blades 18 are rotatable about a longitudinal axis of the axle 20 by means of a motor and gearbox assembly 26.
  • the axle 20 contains a hollow air pipe 28 enabling oxygen containing material in the form of air with or without water mist to be introduced into a flaming pyrolysis zone 34 (described in greater detail below) through the interior of the upper body 12, and an air inlet pipe 30 is provided in an upper region of the upper body 12 to enable a limited amount of air distribution through diffusion in voids in material contained within the upper body 12.
  • the upper body 12 defines a fuel drying zone 32 in which organic material introduced via the hopper 10 and gate valve 14 is dried, and flaming pyrolysis zone 34 in which chemical decomposition of organic molecules in the presence of a limited or partial supply of oxygen in air occurs while the organic material is being agitated by the stirrer blades 18.
  • the upper body 12 of the receptacle 4 is mounted to lower body 8 such that an upper part 36 of the lower body 8 surrounds a lower cylinder 38 of the upper body 4 surrounding the flaming pyrolysis zone 34.
  • Gas discharge pipes 40 are provided through the upper part 36 of the lower body 8 to enable removal of volatile gases generated in the flaming pyrolysis zone 34 and in a char gasification zone 42 located below the flaming pyrolysis zone 34.
  • the lower body 8 has twin walls having a gap 44 therebetween so that chilled water can be circulated through the reactor walls to control the reaction temperature within the lower body 8 and the gas exit temperature.
  • a second agitator 46 for mechanically breaking down char generated in the flaming pyrolysis zone 34 is located below the char gasification zone 42 and includes a pair of adjacently located parallel counter rotating shafts 48 (only one of which is shown in Figure 1 ) having cylindrical and or rectangular blades 50 extending radially outwardly therefrom.
  • the shafts 48 are rotated by means of a motor and gearbox 52 mounted to first ends of the shafts 48, and the shafts 48 are hollow to enable oxygen containing material in the form of air to be introduced, with or without water mist or steam, by means of air pipes 54 at second ends of the shafts 48.
  • the second agitator 46 facilitates char and ash mixture flow through the receptacle 4 by engaging and moving fused ash and unreacted fused char (clinker material) from the char gasification zone 42 and. The second agitator 46 then grinds and pushes such materials downwards to an char and ash removal zone 56 leading to an ash discharge auger system 58 located at the lower end of the gas producer 2.
  • the gas producing apparatus 2 operates as follows.
  • Biomass and or carbon containing waste material is introduced into the fuel drying zone 32 defined in the upper body 12 via the fuel hopper 10 and gate valve 14.
  • the heat energy required for endothermic drying in the fuel drying zone 32 is provided from the flaming pyrolysis zone 34 via radiation and convection heat transfer, and the fuel drying zone 32 is operated at temperatures around 100°C to 300°C, preferably in the region of 200°C.
  • the dried fuel is then agitated by means of the first agitator, the blades 18 of the agitator urging the fuel downwards into the flaming pyrolysis zone 34, while preventing formation of fuel bridges formed during the reaction in the flaming pyrolysis zone 34 and filling voids generated in the flaming pyrolysis zone 34.
  • Dried fuel in the flaming pyrolysis zone 34 is then converted into char and volatile gases, and carbon based char materials generated in the flaming pyrolysis zone 34 descend to the gasification zone 42.
  • char is gasified by means of the following reduction reactions with the addition of further limited amount of oxygen in air and/or steam and/or water mist from nozzles of the blades 50 mounted to the rotating shafts 48: [4] C + H2O ⁇ CO + H2 (+131 MJ/kmol) [5] C + CO2 ⁇ 2CO (+172 MJ/kmol) [6] C + 2H2 ⁇ CH4 (-75 MJ/kmol) [7] CO + H2O ⁇ CO2 + H2 (-41 MJ/kmol) [8] CH4 + H2O ⁇ CO + 3H2 (+206 MJ/kmol)
  • Carbon monoxide and hydrogen gases are mainly generated in the gasification zone 42 and move upwards towards gas discharge pipes 40.
  • the blades 50 mounted to the rotating shafts 48 provide a limited supply of air for partial combustion, and/or steam and/or water mist generally uniformly distributed to the char gasification zone 42, and residue char material gasified while the gases are generated in the gasification zone 42 by means of endothermic water gas shift reactions and char is further partially converted to gases and char with inert ashes.
  • the lower part of the gasification zone 42 operate at temperatures of around 600°C to 900°C, but an operation temperature in the region of 800°C is preferred.
  • the blades 50 of the rotating shafts 48 also function to hold and support the fuel bed like a grate and grind clinker material (fused ash and fused char) and convey such material to the ash removal auger system 58 at the lower end of the receptacle 4. This also serves to convey clinker materials downwards to the ash removal auger system 58.
  • Operation of the gas production apparatus 2 is assisted by forming a negative pressure at gas outlet pipes 40 by means of a gas suction blower (not shown) which removes volatile gases from the system while enabling entry of a limited amount of air through air intake pipes 28, 30, 54.
  • a gas suction blower not shown

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
EP12169260.2A 2012-05-24 2012-05-24 Appareil de production de gaz Withdrawn EP2666845A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12169260.2A EP2666845A1 (fr) 2012-05-24 2012-05-24 Appareil de production de gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12169260.2A EP2666845A1 (fr) 2012-05-24 2012-05-24 Appareil de production de gaz

Publications (1)

Publication Number Publication Date
EP2666845A1 true EP2666845A1 (fr) 2013-11-27

Family

ID=46178436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12169260.2A Withdrawn EP2666845A1 (fr) 2012-05-24 2012-05-24 Appareil de production de gaz

Country Status (1)

Country Link
EP (1) EP2666845A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015086353A1 (fr) * 2013-12-10 2015-06-18 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procédé pour la gazéification de combustibles carbonés sous pression en lit fixe
EP3241881A1 (fr) * 2016-05-02 2017-11-08 HOWÄST GmbH Holz - Wärme - Strom Chaudière à bois haute température sans grille

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583992A (en) * 1984-12-04 1986-04-22 Buck Rogers Mfg. Co., Inc. Biomass gasifier and charcoal producer
US5226927A (en) * 1991-02-13 1993-07-13 Southern California Edison Wood gasifier
WO2005047435A2 (fr) 2003-11-04 2005-05-26 Iti Limited Gazeification
WO2011091080A2 (fr) * 2010-01-19 2011-07-28 Zeropoint Clean Tech, Inc. Gazéifieur à courant descendant présentant une stabilité améliorée
WO2012012823A1 (fr) * 2010-07-27 2012-02-02 Curtin University Of Technology Procédé de gazéification de matière carbonée et système de gazéification

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583992A (en) * 1984-12-04 1986-04-22 Buck Rogers Mfg. Co., Inc. Biomass gasifier and charcoal producer
US5226927A (en) * 1991-02-13 1993-07-13 Southern California Edison Wood gasifier
WO2005047435A2 (fr) 2003-11-04 2005-05-26 Iti Limited Gazeification
WO2011091080A2 (fr) * 2010-01-19 2011-07-28 Zeropoint Clean Tech, Inc. Gazéifieur à courant descendant présentant une stabilité améliorée
WO2012012823A1 (fr) * 2010-07-27 2012-02-02 Curtin University Of Technology Procédé de gazéification de matière carbonée et système de gazéification

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015086353A1 (fr) * 2013-12-10 2015-06-18 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procédé pour la gazéification de combustibles carbonés sous pression en lit fixe
EP3241881A1 (fr) * 2016-05-02 2017-11-08 HOWÄST GmbH Holz - Wärme - Strom Chaudière à bois haute température sans grille

Similar Documents

Publication Publication Date Title
Susastriawan et al. Small-scale downdraft gasifiers for biomass gasification: A review
Guo et al. Effect of design and operating parameters on the gasification process of biomass in a downdraft fixed bed: An experimental study
JP5877237B2 (ja) バイオマスから低タール合成ガスを製造する方法および装置
EP1348011B1 (fr) Gazeifieur a plusieurs facettes et procedes associes
US20150191664A1 (en) Method of gasifying carbonaceous material and a gasification system
US20120121468A1 (en) System For The Conversion Of Carbonaceous Feedstocks To A Gas Of A Specified Composition
JPS5851038B2 (ja) ネンリヨウガスノ セイゾウホウホウナラビニ ソノソウチ
JP2008260832A (ja) 廃棄物再生処理方法及び廃棄物再生処理システム
AU2014366885B2 (en) Process and apparatus for cleaning raw product gas
KR20030066805A (ko) 고형연료가스화 장치
GB2539518A (en) A gasification system
JP4547244B2 (ja) 有機物のガス化装置
KR101632146B1 (ko) 바이오매스 가스화 장치
ITTO20120856A1 (it) Gassificatore in continuo, in particolare per biomasse e rifiuti urbani e industriali.
WO2017138157A1 (fr) Four de reformeur et système de gazéification utilisant celui-ci
Sudarmanta Dual fuel engine performance using biodiesel and syn-gas from rice husk downdraft gasification for power generation
EP2666845A1 (fr) Appareil de production de gaz
JP2004204106A (ja) 有機物のガス化装置
JP6006467B1 (ja) 改質炉及びそれを用いたガス化システム
CA3196638A1 (fr) Procede de gazeification d'une matiere organique et installation pour effectuer ledit procede
Dudyński Novel oxygen-steam gasification process for high quality gas from biomass
AU2009100701A4 (en) Mechanical cleaning device for a downstream gasifier
JP6996991B2 (ja) ガス化システム
KR102653928B1 (ko) 타르 개질기 일체형 가스화기
JP5527743B2 (ja) ガス化装置、燃料生成システム、ガス化方法および燃料生成方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140528