WO2014202415A3 - Vorrichtung und verfahren zur generativen herstellung zumindest eines bauteilbereichs eines bauteils - Google Patents

Vorrichtung und verfahren zur generativen herstellung zumindest eines bauteilbereichs eines bauteils Download PDF

Info

Publication number
WO2014202415A3
WO2014202415A3 PCT/EP2014/061904 EP2014061904W WO2014202415A3 WO 2014202415 A3 WO2014202415 A3 WO 2014202415A3 EP 2014061904 W EP2014061904 W EP 2014061904W WO 2014202415 A3 WO2014202415 A3 WO 2014202415A3
Authority
WO
WIPO (PCT)
Prior art keywords
component
region
producing
coating apparatus
constructing
Prior art date
Application number
PCT/EP2014/061904
Other languages
English (en)
French (fr)
Other versions
WO2014202415A2 (de
Inventor
Andreas Jakimov
Georg SCHLICK
Herbert Hanrieder
Martin Leuterer
Original Assignee
MTU Aero Engines AG
Eos Gmbh Electro Optical Systems
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 MTU Aero Engines AG, Eos Gmbh Electro Optical Systems filed Critical MTU Aero Engines AG
Priority to EP14728974.8A priority Critical patent/EP3010673A2/de
Priority to CN201480034410.6A priority patent/CN105555443A/zh
Priority to US14/898,909 priority patent/US20160368051A1/en
Publication of WO2014202415A2 publication Critical patent/WO2014202415A2/de
Publication of WO2014202415A3 publication Critical patent/WO2014202415A3/de

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/105Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10Processes of additive manufacturing
    • B29C64/141Processes of additive manufacturing using only solid materials
    • B29C64/153Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20Direct sintering or melting
    • B22F10/28Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/10Auxiliary heating means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/10Auxiliary heating means
    • B22F12/13Auxiliary heating means to preheat the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40Radiation means
    • B22F12/44Radiation means characterised by the configuration of the radiation means
    • B22F12/45Two or more
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/60Planarisation devices; Compression devices
    • B22F12/67Blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205Means for applying layers
    • B29C64/214Doctor blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264Arrangements for irradiation
    • B29C64/268Arrangements for irradiation using laser beams; using electron beams [EB]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00Processes of additive manufacturing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00Aspects linked to processes or compositions used in powder metallurgy
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00Data acquisition or data processing for additive manufacturing
    • B33Y50/02Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Powder Metallurgy (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung (10) zur generativen Herstellung zumindest eines Bauteilbereichs eines Bauteils (12), insbesondere eines Bauteils (12) einer Strömungsmaschine, wobei die Vorrichtung (10) mindestens einen Beschichter (14) zum Auftrag von mindestens einer Pulverschicht eines Bauteilwerkstoffs auf mindestens eine Aufbau- und Fügezone (20) mindestens einer absenkbaren Bauteilplattform (16), wobei der Beschichter (14) relativ zu der Bauteilplattform (16) bewegbar ist; und mindestens eine Strahlungsquelle zum Erzeugen wenigstens eines Hochenergiestrahls (22), mittels welchem die Pulverschicht im Bereich der Aufbau- und Fügezone (20) lokal zu einer Bauteilschicht verschmelzbar und/oder versinterbar ist, umfasst. Zudem ist mindestens eine Heizvorrichtung (24, 28) an dem Beschichter (14) angeordnet. Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung zumindest eines Bauteilbereichs eines Bauteils und einen Beschichter.
PCT/EP2014/061904 2013-06-20 2014-06-06 Vorrichtung und verfahren zur generativen herstellung zumindest eines bauteilbereichs eines bauteils WO2014202415A2 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14728974.8A EP3010673A2 (de) 2013-06-20 2014-06-06 Vorrichtung und verfahren zur generativen herstellung zumindest eines bauteilbereichs eines bauteils
CN201480034410.6A CN105555443A (zh) 2013-06-20 2014-06-06 用于附加形成部件的至少一个部件区的装置和方法
US14/898,909 US20160368051A1 (en) 2013-06-20 2014-06-06 Device and method for additively producing at least one component region of a component

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211679 2013-06-20
DE102013211679.9 2013-06-20

Publications (2)

Publication Number Publication Date
WO2014202415A2 WO2014202415A2 (de) 2014-12-24
WO2014202415A3 true WO2014202415A3 (de) 2015-08-27

Family

ID=50897633

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/061904 WO2014202415A2 (de) 2013-06-20 2014-06-06 Vorrichtung und verfahren zur generativen herstellung zumindest eines bauteilbereichs eines bauteils

Country Status (5)

Country Link
US (1) US20160368051A1 (de)
EP (1) EP3010673A2 (de)
CN (1) CN105555443A (de)
DE (1) DE102014108081A1 (de)
WO (1) WO2014202415A2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014204123A1 (de) * 2014-03-06 2015-10-29 MTU Aero Engines AG Vorrichtung und Verfahren zum generativen Herstellen eines Bauteils
WO2015155745A1 (en) * 2014-04-10 2015-10-15 Ge Avio S.R.L. Process for forming a component by means of additive manufacturing, and powder dispensing device for carrying out such a process
DE102015201796B3 (de) 2015-02-03 2016-06-02 MTU Aero Engines AG Pulverauftragseinheit und entsprechende Vorrichtung und Verwendung einer Pulverauftragseinheit
JP5947941B1 (ja) * 2015-03-26 2016-07-06 Dmg森精機株式会社 付加加工用ヘッドおよび加工機械
DE102015224947A1 (de) * 2015-12-11 2017-06-14 Bosch Mahle Turbo Systems Gmbh & Co. Kg Verfahren zum Herstellen einer ein Turbinenrad und eine Welle umfassenden Turbinenrad-Anordnung
DE102016214170A1 (de) * 2016-08-01 2018-02-01 MTU Aero Engines AG Induktionsheizvorrichtung, Vorrichtung mit mindestens einer Induktionsheizvorrichtung und Verfahren zur induktiven Erwärmung von Bauelementen oder eines Bauteilwerkstoffs
CN106738904A (zh) * 2016-12-28 2017-05-31 厦门达天电子科技有限公司 一种光引发快速增材制造设备及方法
US10974474B2 (en) * 2017-06-12 2021-04-13 General Electric Company Applicator repair for additive manufacturing system
DE102017213762A1 (de) 2017-08-08 2019-02-14 Siemens Aktiengesellschaft Verfahren und Vorrichtung zur generativen Herstellung eines Bauteils oder eines Bauteilabschnitts
DE102017219977A1 (de) * 2017-11-09 2019-05-09 MTU Aero Engines AG Verfahren zum generativen aufbauen eines bauteils
DE102018203273A1 (de) * 2018-03-06 2019-09-12 MTU Aero Engines AG Induktionsheizvorrichtung, Vorrichtung zur additiven Herstellung zumindest eines Bauteilbereichs eines Bauteils mit einer solchen Induktionsheizvorrichtung, Verfahren zum induktiven Erwärmen eines Bauteilbereichs und Bauteil für eine Strömungsmaschine
FR3120203A1 (fr) * 2021-03-01 2022-09-02 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif de fabrication additive par fusion sur lit de poudre
IT202100013400A1 (it) 2021-05-24 2021-08-24 3D New Tech S R L Dispositivo di trasferimento di calore per additive manufacturing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002042023A1 (en) * 2000-11-27 2002-05-30 National University Of Singapore Method and apparatus for creating a three-dimensional metal part using high-temperature direct laser melting
DE102006053121B3 (de) * 2006-11-10 2007-12-27 Eos Gmbh Electro Optical Systems Vorrichtung und Verfahren zum Herstellen eines dreidimensionalen Objektes mittels eines Beschichters für pulverförmiges Aufbaumaterial
CN201168782Y (zh) * 2008-02-03 2008-12-24 何德生 一种具有预热功能的激光粉末烧结快速成型机
CN103100713A (zh) * 2013-01-23 2013-05-15 西安铂力特激光成形技术有限公司 选择性激光选区熔化slm设备送粉筒预热装置和预热方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005016940B4 (de) * 2005-04-12 2007-03-15 Eos Gmbh Electro Optical Systems Vorrichtung und Verfahren zum Auftragen von Schichten eines pulverförmigen Materials auf eine Oberfläche
DE102006058949A1 (de) 2006-12-14 2008-06-19 Inno-Shape Gmbh Vorrichtung und Verfahren zur Reparatur oder Herstellung von Schaufelspitzen von Schaufeln einer Gasturbine, insbesondere eines Flugtriebwerkes
CN201300207Y (zh) * 2008-10-30 2009-09-02 华中科技大学 一种金属零件选区激光熔化快速成型设备
EP2191922B1 (de) * 2008-11-27 2011-01-05 MTT Technologies GmbH Träger- und Pulverauftragsvorrichtung für eine Anlage zur Herstellung von Werkstücken durch Beaufschlagen von Pulverschichten mit elektromagnetischer Strahlung oder Teilchenstrahlung
DE102009051479A1 (de) 2009-10-30 2011-05-05 Mtu Aero Engines Gmbh Verfahren und Vorrichtung zur Herstellung eines Bauteils einer Strömungsmaschine
EP2359964B1 (de) 2010-01-26 2013-11-20 Alstom Technology Ltd Verfahren zum Herstellen eines 3-dimensionalen Bauteils mittels selektiven Laserschmelzens (SLM)
DE102012206122A1 (de) 2012-04-13 2013-10-17 MTU Aero Engines AG Mehrfach-Spulenanordnung für eine Vorrichtung zur generativen Herstellung von Bauteilen und entsprechendes Herstellverfahren
CN202591611U (zh) * 2012-05-29 2012-12-12 西安科技大学 一种可移动式激光快速成型预热装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002042023A1 (en) * 2000-11-27 2002-05-30 National University Of Singapore Method and apparatus for creating a three-dimensional metal part using high-temperature direct laser melting
DE102006053121B3 (de) * 2006-11-10 2007-12-27 Eos Gmbh Electro Optical Systems Vorrichtung und Verfahren zum Herstellen eines dreidimensionalen Objektes mittels eines Beschichters für pulverförmiges Aufbaumaterial
CN201168782Y (zh) * 2008-02-03 2008-12-24 何德生 一种具有预热功能的激光粉末烧结快速成型机
CN103100713A (zh) * 2013-01-23 2013-05-15 西安铂力特激光成形技术有限公司 选择性激光选区熔化slm设备送粉筒预热装置和预热方法

Also Published As

Publication number Publication date
US20160368051A1 (en) 2016-12-22
WO2014202415A2 (de) 2014-12-24
CN105555443A (zh) 2016-05-04
EP3010673A2 (de) 2016-04-27
DE102014108081A1 (de) 2014-12-24

Similar Documents

Publication Publication Date Title
WO2014202413A3 (de) Vorrichtung und verfahren zur generativen herstellung zumindest eines bauteilbereichs eines bauteils
WO2014202415A3 (de) Vorrichtung und verfahren zur generativen herstellung zumindest eines bauteilbereichs eines bauteils
WO2015040433A3 (en) Additive manufacturing apparatus and method
WO2018032022A8 (de) Verfahren und vorrichtung zur lithographiebasierten generativen fertigung von dreidimensionalen formkörpern
WO2015119692A3 (en) Layered manufacturing of single crystal alloy components
WO2015073391A3 (en) Laser processing of a bed of powdered material with variable masking
MX2016012806A (es) Dispositivo de deposicion tridimensional y metodo de deposicion tridimensional.
MX2016012702A (es) Dispositivo para deposicion tridimensional y metodo de deposicion tridimensional.
CA2889477C (en) Additive manufacturing method and apparatus
TR201904971T4 (tr) Katkı katmanı üretim yöntemi ve cihazı.
EA201690433A1 (ru) Способ получения подложки, снабженной покрытием, содержащим несплошной тонкий металлический слой
WO2015193819A3 (en) Method and apparatus for increasing bonding in material extrusion additive manufacturing
IL245132B (en) Composite material, heat absorbing component and method for manufacturing the composite material
WO2014206573A3 (de) Verfahren und bearbeitungsmaschine zum generieren eines dreidimensionalen bauteils durch selektives laserschmelzen
EP2492084A4 (de) Verfahren zur herstellung eines dreidimensional geformten objekts und vorrichtung zu dessen herstellung
WO2012051979A3 (de) Vorrichtung zum herstellen, reparieren und/oder austauschen eines bauteils mittels eines durch energiestrahlung verfestigbaren pulvers, sowie ein verfahren und ein gemäss dem verfahren hergestelltes bauteil
MX2017000598A (es) Metodo para producir un sustrato revestido, sustrato plano, que comprende al menos dos capas aplicadas por medio de calentamiento, y uso del sustrato revestido.
EP3267499A4 (de) Zusammensetzung zur formung eines lichtstreuungsverbundkörpers, lichtstreuungsverbundkörper und verfahren zur herstellung davon
EP2960007A3 (de) Laserschweissverfahren und schweisskonstruktion
SG10201705541RA (en) A method of laser processing of a metallic material with high dynamic control of the movement axes of the laser beam along a predetermined processing path, as well as a machine and a computer program for the implementation of said method
EP3533817A4 (de) Polymerisierbare zusammensetzung für optisches material, aus der besagten zusammensetzung erhaltenes optisches material und verfahren zur herstellung der besagten zusammensetzung
EP3521926A4 (de) Aktivlichtempfindliche oder strahlungsempfindliche harzzusammensetzung, strukturformungsverfahren und verfahren zur herstellung einer elektronischen vorrichtung
EP3480007A4 (de) Elektromagnetische wellen übertragendes metallelement, artikel damit und verfahren zur herstellung einer elektromagnetische wellen übertragenden metallschicht
MX2015009065A (es) Proceso para obtener un sustrato equipado con un revestimiento.
MX2015017579A (es) Metodo para unir piezas metalicas.

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201480034410.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14728974

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 2014728974

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 14898909

Country of ref document: US