EP1013884A3 - Turbinenschaufel mit aktiv gekültem Deckbandelememt - Google Patents

Turbinenschaufel mit aktiv gekültem Deckbandelememt Download PDF

Info

Publication number
EP1013884A3
EP1013884A3 EP99811187A EP99811187A EP1013884A3 EP 1013884 A3 EP1013884 A3 EP 1013884A3 EP 99811187 A EP99811187 A EP 99811187A EP 99811187 A EP99811187 A EP 99811187A EP 1013884 A3 EP1013884 A3 EP 1013884A3
Authority
EP
European Patent Office
Prior art keywords
cooling
turbine blade
shroud element
shroud
blade
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.)
Granted
Application number
EP99811187A
Other languages
English (en)
French (fr)
Other versions
EP1013884B1 (de
EP1013884A2 (de
Inventor
Alexander Dr. Beeck
Ibrahim Dr. El-Nashar
Beat Von Arx
Bernhard Weigand
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.)
GE Vernova GmbH
Original Assignee
Alstom Schweiz AG
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
Priority claimed from DE19860245A external-priority patent/DE19860245A1/de
Priority claimed from DE19860244A external-priority patent/DE19860244B4/de
Application filed by Alstom Schweiz AG filed Critical Alstom Schweiz AG
Publication of EP1013884A2 publication Critical patent/EP1013884A2/de
Publication of EP1013884A3 publication Critical patent/EP1013884A3/de
Application granted granted Critical
Publication of EP1013884B1 publication Critical patent/EP1013884B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
    • F01D5/187—Convection cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/80—Platforms for stationary or moving blades
    • F05B2240/801—Platforms for stationary or moving blades cooled platforms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/80—Platforms for stationary or moving blades
    • F05D2240/81—Cooled platforms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

Bei einer luftgekühlten Turbinenschaufel (10), welche an der Schaufelspitze ein sich quer zur Schaufellängsachse erstreckendes Deckbandelement (11) aufweist, wobei das Deckbandelement (11) zur Kühlung von einer Mehrzahl von Kühlbohrungen (17) durchzogen ist, welche eingangsseitig mit wenigstens einem durch die Turbinenschaufel (10) zur Schaufelspitze verlaufenden Kühlluftkanal (18) in Verbindung stehen, und ausgangsseitig in den die Turbinenschaufel (10) umgebenden Aussenraum münden, wird eine verbesserte und gesicherte Kühlung dadurch erreicht, dass die Kühlbohrungen (17) in dem Deckbandelement (11) zumindest annähernd parallel zur Bewegungsrichtung der Schaufelspitze von innen nach aussen verlaufen und jeweils vor dem äusseren Rand (25) des Deckbandelements (11) in eine zum Aussenraum hin offene Oberflächenvertiefung münden. Vorzugsweise ist die Deckbandoberseite (22) mit mindestens zwei parallel verlaufenden Rippen (12) und (13) ausgerüstet, die im Zusammenwirken mit der gegenüberliegenden Gehäusewand eine Kavität (21) bilden, in die die aus den Kühlbohrungen (17) austretende Kühlluft einströmt.
EP99811187A 1998-12-24 1999-12-21 Turbinenschaufel mit aktiv gekühltem Deckbandelememt Expired - Lifetime EP1013884B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19860245 1998-12-24
DE19860244 1998-12-24
DE19860245A DE19860245A1 (de) 1998-12-24 1998-12-24 Turbinenschaufel mit aktiv gekühltem Deckbandelement
DE19860244A DE19860244B4 (de) 1998-12-24 1998-12-24 Turbinenschaufel mit aktiv gekühltem Deckbandelement

Publications (3)

Publication Number Publication Date
EP1013884A2 EP1013884A2 (de) 2000-06-28
EP1013884A3 true EP1013884A3 (de) 2003-11-05
EP1013884B1 EP1013884B1 (de) 2005-07-27

Family

ID=26051058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99811187A Expired - Lifetime EP1013884B1 (de) 1998-12-24 1999-12-21 Turbinenschaufel mit aktiv gekühltem Deckbandelememt

Country Status (4)

Country Link
US (1) US6340284B1 (de)
EP (1) EP1013884B1 (de)
CN (1) CN1260442A (de)
DE (1) DE59912323D1 (de)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041247B1 (de) 1999-04-01 2012-08-01 General Electric Company Gasturbinenschaufel mit einem offenen Kühlkreislauf
US6761534B1 (en) 1999-04-05 2004-07-13 General Electric Company Cooling circuit for a gas turbine bucket and tip shroud
US6254345B1 (en) * 1999-09-07 2001-07-03 General Electric Company Internally cooled blade tip shroud
DE19963377A1 (de) * 1999-12-28 2001-07-12 Abb Alstom Power Ch Ag Turbinenschaufel mit aktiv gekühltem Deckbandelement
US6471480B1 (en) * 2001-04-16 2002-10-29 United Technologies Corporation Thin walled cooled hollow tip shroud
JP2002371802A (ja) * 2001-06-14 2002-12-26 Mitsubishi Heavy Ind Ltd ガスタービンにおけるシュラウド一体型動翼と分割環
US6632069B1 (en) * 2001-10-02 2003-10-14 Oleg Naljotov Step of pressure of the steam and gas turbine with universal belt
US20040101410A1 (en) * 2001-10-02 2004-05-27 Oleg Naljotov Axial flow fluid machine
US6491498B1 (en) * 2001-10-04 2002-12-10 Power Systems Mfg, Llc. Turbine blade pocket shroud
US7074006B1 (en) 2002-10-08 2006-07-11 The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Endwall treatment and method for gas turbine
CN100386502C (zh) * 2003-04-18 2008-05-07 奥莱格·耐尔卓托夫 具有改进的罩或密封件的蒸汽/气体涡轮机
US7094023B2 (en) * 2004-02-09 2006-08-22 United Technologies Corporation Shroud honeycomb cutter
US7066714B2 (en) * 2004-03-26 2006-06-27 United Technologies Corporation High speed rotor assembly shroud
EP1591626A1 (de) 2004-04-30 2005-11-02 Alstom Technology Ltd Schaufel für Gasturbine
KR100758725B1 (ko) 2005-10-17 2007-09-14 올레지 날조토브 유니버설 쉬라우드를 구비한 증기/가스 터빈 압력 단
US7568882B2 (en) * 2007-01-12 2009-08-04 General Electric Company Impingement cooled bucket shroud, turbine rotor incorporating the same, and cooling method
US7938951B2 (en) * 2007-03-22 2011-05-10 General Electric Company Methods and systems for forming tapered cooling holes
US20080230396A1 (en) * 2007-03-22 2008-09-25 General Electric Company Methods and systems for forming turbulated cooling holes
US7964087B2 (en) * 2007-03-22 2011-06-21 General Electric Company Methods and systems for forming cooling holes having circular inlets and non-circular outlets
US7946816B2 (en) * 2008-01-10 2011-05-24 General Electric Company Turbine blade tip shroud
US7946817B2 (en) * 2008-01-10 2011-05-24 General Electric Company Turbine blade tip shroud
US8057177B2 (en) * 2008-01-10 2011-11-15 General Electric Company Turbine blade tip shroud
US20090180894A1 (en) * 2008-01-10 2009-07-16 General Electric Company Turbine blade tip shroud
US8317461B2 (en) * 2008-08-27 2012-11-27 United Technologies Corporation Gas turbine engine component having dual flow passage cooling chamber formed by single core
GB0901129D0 (en) * 2009-01-26 2009-03-11 Rolls Royce Plc Rotor blade
CH700686A1 (de) * 2009-03-30 2010-09-30 Alstom Technology Ltd Schaufel für eine gasturbine.
GB0910177D0 (en) * 2009-06-15 2009-07-29 Rolls Royce Plc A cooled component for a gas turbine engine
US8353669B2 (en) * 2009-08-18 2013-01-15 United Technologies Corporation Turbine vane platform leading edge cooling holes
DE102009049649A1 (de) * 2009-10-15 2011-04-21 Abb Turbo Systems Ag Turbinenrad
JP5517910B2 (ja) * 2010-12-22 2014-06-11 三菱重工業株式会社 タービン、及びシール構造
US20140064984A1 (en) * 2012-08-31 2014-03-06 General Electric Company Cooling arrangement for platform region of turbine rotor blade
JP5612136B2 (ja) 2013-01-09 2014-10-22 ファナック株式会社 複数の直線により形状が定義されるインペラの形成方法およびインペラ
US9759070B2 (en) * 2013-08-28 2017-09-12 General Electric Company Turbine bucket tip shroud
US20160169001A1 (en) * 2013-09-26 2016-06-16 United Technologies Corporation Diffused platform cooling holes
US10301967B2 (en) * 2013-10-21 2019-05-28 United Technologies Corporation Incident tolerant turbine vane gap flow discouragement
US10539026B2 (en) 2017-09-21 2020-01-21 United Technologies Corporation Gas turbine engine component with cooling holes having variable roughness
US10641108B2 (en) * 2018-04-06 2020-05-05 United Technologies Corporation Turbine blade shroud for gas turbine engine with power turbine and method of manufacturing same
JP7477284B2 (ja) * 2019-11-14 2024-05-01 三菱重工業株式会社 タービン翼及びガスタービン
US11255198B1 (en) * 2021-06-10 2022-02-22 General Electric Company Tip shroud with exit surface for cooling passages
CN115324657A (zh) * 2022-10-12 2022-11-11 中国航发四川燃气涡轮研究院 涡轮工作叶片叶冠冷却结构

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527544A (en) * 1968-12-12 1970-09-08 Gen Motors Corp Cooled blade shroud
US3816022A (en) * 1972-09-01 1974-06-11 Gen Electric Power augmenter bucket tip construction for open-circuit liquid cooled turbines
JPS5847104A (ja) * 1981-09-11 1983-03-18 Agency Of Ind Science & Technol ガスタ−ビンのタ−ビン動翼
US5003766A (en) * 1984-10-10 1991-04-02 Paul Marius A Gas turbine engine
GB1605335A (en) * 1975-08-23 1991-12-18 Rolls Royce A rotor blade for a gas turbine engine
US5122033A (en) * 1990-11-16 1992-06-16 Paul Marius A Turbine blade unit
EP0357984B1 (de) * 1988-08-31 1993-05-05 Westinghouse Electric Corporation Gasturbine mit einem gekühlten Leitschaufeldeckring
US5306401A (en) * 1993-03-15 1994-04-26 Fierkens Richard H J Method for drilling cooling holes in turbine blades
US5399065A (en) * 1992-09-03 1995-03-21 Hitachi, Ltd. Improvements in cooling and sealing for a gas turbine cascade device
DE19601818A1 (de) * 1995-02-23 1996-08-29 Bmw Rolls Royce Gmbh Turbinenschaufel-Anordnung mit einem Deckband

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1423833A (en) 1972-04-20 1976-02-04 Rolls Royce Rotor blades for fluid flow machines
US4177011A (en) 1976-04-21 1979-12-04 General Electric Company Bar for sealing the gap between adjacent shroud plates in liquid-cooled gas turbine
GB2223276B (en) * 1988-09-30 1992-09-02 Rolls Royce Plc Turbine aerofoil blade
GB2228540B (en) * 1988-12-07 1993-03-31 Rolls Royce Plc Cooling of turbine blades
JPH03182602A (ja) * 1989-12-08 1991-08-08 Hitachi Ltd 冷却流路を有するガスタービン翼及びその冷却流路の加工方法
GB9224241D0 (en) 1992-11-19 1993-01-06 Bmw Rolls Royce Gmbh A turbine blade arrangement
GB2290833B (en) 1994-07-02 1998-08-05 Rolls Royce Plc Turbine blade
US5482435A (en) 1994-10-26 1996-01-09 Westinghouse Electric Corporation Gas turbine blade having a cooled shroud
JP3182602B2 (ja) 1995-03-31 2001-07-03 矢崎総業株式会社 吸収冷温水機とその制御方法
US5785496A (en) 1997-02-24 1998-07-28 Mitsubishi Heavy Industries, Ltd. Gas turbine rotor
JPH10266803A (ja) 1997-03-25 1998-10-06 Mitsubishi Heavy Ind Ltd ガスタービン冷却動翼
JPH1113402A (ja) * 1997-06-23 1999-01-19 Mitsubishi Heavy Ind Ltd ガスタービン冷却翼チップシュラウド
EP0935052B1 (de) * 1998-02-04 2006-05-03 Mitsubishi Heavy Industries, Ltd. Gasturbinenlaufschaufel

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527544A (en) * 1968-12-12 1970-09-08 Gen Motors Corp Cooled blade shroud
US3816022A (en) * 1972-09-01 1974-06-11 Gen Electric Power augmenter bucket tip construction for open-circuit liquid cooled turbines
GB1605335A (en) * 1975-08-23 1991-12-18 Rolls Royce A rotor blade for a gas turbine engine
JPS5847104A (ja) * 1981-09-11 1983-03-18 Agency Of Ind Science & Technol ガスタ−ビンのタ−ビン動翼
US5003766A (en) * 1984-10-10 1991-04-02 Paul Marius A Gas turbine engine
EP0357984B1 (de) * 1988-08-31 1993-05-05 Westinghouse Electric Corporation Gasturbine mit einem gekühlten Leitschaufeldeckring
US5122033A (en) * 1990-11-16 1992-06-16 Paul Marius A Turbine blade unit
US5399065A (en) * 1992-09-03 1995-03-21 Hitachi, Ltd. Improvements in cooling and sealing for a gas turbine cascade device
US5306401A (en) * 1993-03-15 1994-04-26 Fierkens Richard H J Method for drilling cooling holes in turbine blades
DE19601818A1 (de) * 1995-02-23 1996-08-29 Bmw Rolls Royce Gmbh Turbinenschaufel-Anordnung mit einem Deckband

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 128 (M - 220) 3 June 1983 (1983-06-03) *

Also Published As

Publication number Publication date
EP1013884B1 (de) 2005-07-27
CN1260442A (zh) 2000-07-19
US6340284B1 (en) 2002-01-22
EP1013884A2 (de) 2000-06-28
DE59912323D1 (de) 2005-09-01

Similar Documents

Publication Publication Date Title
EP1013884A3 (de) Turbinenschaufel mit aktiv gekültem Deckbandelememt
DE69714960T2 (de) Wirbelelementkonstruktion für Kühlkanäle eines Gasturbinenrotorschaufelblattes
EP1267041A2 (de) Gekühlte Turbinenschaufel
DE60211066T2 (de) Gekühltes Schaufelblatt
DE19618625C1 (de) Flüssigkeitsgekühlter Kolben für Verbrennungsmotoren
DE3209824A1 (de) Auswechselbare spitzenkappe fuer eine laufschaufel
DE60026862T2 (de) Hülse für die klinge eines messers
DE2906366A1 (de) Turbinenschaufel
DE2923136A1 (de) Nebelerzeuger und giessform dafuer
DE1157432B (de) Schaufel fuer Stroemungsmaschinen, insbesondere fuer Axialgasturbinen
DE2712863C3 (de) Schlagwerkzeug zum Abtragen von Oberflächen
DE19621415A1 (de) Trockenrasierer
WO2012116687A1 (de) Kolben für einen verbrennungsmotor
DE3423551A1 (de) Kolbeneinheit mit kuehlmittelspeicherelement mit einem tiefen schmalen speicher und einem flachen breiten speicher
DE3707462C2 (de)
EP0569059A3 (de) Karabinerhaken
DE29610377U1 (de) Haarschneidemaschine
DE4342044B4 (de) Kolben für einen Verbrennungsmotor
DE1751812A1 (de) Leitschaufelkranz fuer Turbomaschinen
DE1956503B2 (de) Fluessigkeitsgekuehlter kolben fuer brennkraftmaschinen
DE360314C (de) Brikettpresse mit gekuehlten Pressformen und Stempeln
WO2014154616A1 (de) Kolben mit durch spritzöl gekühltem kolbenboden
DE2604038A1 (de) Kolben fuer verbrennungskraftmaschinen
DE1813247A1 (de) Schneidglied fuer Saegeketten
DE8516445U1 (de) Elektrisch beheiztes Dampfbügeleisen

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: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALSTOM

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALSTOM (SWITZERLAND) LTD

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALSTOM TECHNOLOGY LTD

17P Request for examination filed

Effective date: 20040430

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20040709

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59912323

Country of ref document: DE

Date of ref document: 20050901

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050917

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060428

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59912323

Country of ref document: DE

Representative=s name: ROESLER, UWE, DIPL.-PHYS.UNIV., DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 59912323

Country of ref document: DE

Owner name: ANSALDO ENERGIA IP UK LIMITED, GB

Free format text: FORMER OWNER: ALSTOM TECHNOLOGY LTD., BADEN, CH

Ref country code: DE

Ref legal event code: R081

Ref document number: 59912323

Country of ref document: DE

Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH, CH

Free format text: FORMER OWNER: ALSTOM TECHNOLOGY LTD., BADEN, CH

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

Owner name: ALSTOM TECHNOLOGY LTD, CH

Effective date: 20161110

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20161213

Year of fee payment: 18

Ref country code: GB

Payment date: 20161222

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20161222

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59912323

Country of ref document: DE

Representative=s name: ROESLER, UWE, DIPL.-PHYS.UNIV., DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 59912323

Country of ref document: DE

Owner name: ANSALDO ENERGIA IP UK LIMITED, GB

Free format text: FORMER OWNER: GENERAL ELECTRIC TECHNOLOGY GMBH, BADEN, CH

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20170824 AND 20170830

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Owner name: ANSALDO ENERGIA IP UK LIMITED, GB

Effective date: 20171221

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59912323

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20171221

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180102

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171221