EP2531308A2 - Bande métallique ayant une epaisseur constantes présentant des différentes propriétés mécaniques - Google Patents

Bande métallique ayant une epaisseur constantes présentant des différentes propriétés mécaniques

Info

Publication number
EP2531308A2
EP2531308A2 EP11702167A EP11702167A EP2531308A2 EP 2531308 A2 EP2531308 A2 EP 2531308A2 EP 11702167 A EP11702167 A EP 11702167A EP 11702167 A EP11702167 A EP 11702167A EP 2531308 A2 EP2531308 A2 EP 2531308A2
Authority
EP
European Patent Office
Prior art keywords
metal strip
mechanical properties
rolling
areas
thickness
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Withdrawn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
EP11702167A
Other languages
German (de)
English (en)
Inventor
Jens-Ulrik Becker
Harald Hofmann
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel Europe 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
Application filed by ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Publication of EP2531308A2 publication Critical patent/EP2531308A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2205/00—Particular shaped rolled products
    • B21B2205/02—Tailored blanks
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12458—All metal or with adjacent metals having composition, density, or hardness gradient

Definitions

  • the invention relates to a metal strip made of steel by producing a hot strip by hot rolling and
  • the invention relates to a circuit board, which is made of the metal strip according to the invention and its use and a method for producing the metal strip.
  • Components are made of a circuit board, which in turn consists of two frontally interconnected sheets with different mechanical properties. For example, by varying the thickness at
  • Ka ltband produce with sections varying thickness, which due to the varying thickness in the specific areas different mechanical properties
  • the present invention is therefore based on the object to provide a metal strip available, adapted from which with little effort to specific loads
  • Components with minimal weight can be produced. It is also intended to propose a method for producing the metal strip, a board made of the metal strip and their specific use.
  • the object is achieved by a metal strip, which after cold rolling a constant metal strip thickness and sections of areas with varying mechanical properties
  • cold rolling in the sense of the present invention means that immediately after completion of the cold rolling, i. without any further treatment, for example, a temperature treatment, areas
  • Cold rolls can be cut from the metal strip using conventional devices to produce blanks having regions with varying mechanical properties. There are no more difficulties in handling the metal strip. Furthermore, the constant thickness in the design of any required forming tools and also during the forming process as such is advantageous. Thus, it is possible to produce a component by simple means, which has varying mechanical properties in different ways
  • a board can be produced, which is designed to be load-appropriate, a
  • Metal strip according to the invention is not provided, so that it can be easily wound on a coil and
  • Metal bands indicate the areas with varying
  • the cold-rolled metal strip by flexible hot rolling, by flexible casting or by made flexible cold rolling with subsequent annealing, so that the metal strip prior to cold rolling has areas with varying thicknesses, the areas of varying thickness after cold rolling have varying Abwalzgrade and optionally periodically arranged. This ensures that the metal strip immediately after cold rolling
  • Material is dependent. Depending on the material is in particular to what extent tensile strength, yield strength and
  • flexible casting can be done by in-line gouging using a ribbon casting process or direct-strip-casting (DSC) with inline hot rolling.
  • DSC direct-strip-casting
  • a Metai Iband for the Kaltwal zen be provided to final thickness, which then has areas with varying Abwalzgraden or varying mechanical properties.
  • the regions with varying mechanical properties are arranged periodically on the metal strip, so that there is the possibility of a simple way
  • An advantageous forming behavior of a component but also a circuit board can be achieved by arranging transition regions between the regions of the metal strip with varying mechanical properties the mechanical properties, in particular tensile strengths, yield strengths and / or elongation at break are at least partially changed continuously, are arranged.
  • the transition regions for example, between egg nem area with a high and a region with lower tensile strength, for example, the forming behavior of the board in the manufacture of components can be improved because the board is less prone to the formation of cracks.
  • the cracking tendency of deformed components with corresponding transitional areas of the mechanical properties is also lower under load.
  • Transition areas is preferably 50 mm and more.
  • Cold rolling rates for example after flexible hot rolling, can vary between 0 and 50%.
  • the areas with greater wall thickness must have a rolling degree of greater than 0% during cold rolling.
  • the thickness of the metal strip is preferably 0.5 mm to 3 mm. In these areas, for example, can be produced by flexible hot rolling and subsequent cold rolling in a simple way a metal strip with varying mechanical properties in sections.
  • the metal band itself is particularly well suited for this strength
  • any steel grade is suitable for the production of a metal strip according to the invention, although the strongly strengthening steel grades are preferred.
  • embodiments of the metal strip according to the invention consist of high-manganese steels, rust-free stainless steels
  • stainless austenitic stainless steels or.
  • the metal strip may preferably have an organic and / or inorganic coating.
  • an inorganic coating is in particular a
  • Galvanization in question but also an AlSi coating, if desired.
  • the steels mentioned above show in particular a significant increase in the tensile strength and the yield strength in Berel chen with higher Abwal zgrad compared to other steel grades, without the
  • Corresponding elongation at break values decrease too much. This is important for subsequent forming processes of the components and when using the later component. This effect is used to provide areas of very high tensile strength and yield strength.
  • the previously derived object is also achieved by a circuit board
  • the board manufactured from a metal strip according to the invention dissolved, wherein the board has a constant thickness, consists of a single steel material and sections having regions with varying mechanical properties.
  • the board is therefore cut out of the metal strip according to the invention such that areas with varying
  • the board can be designed to load and optimally adapted to their intended use. The whole thing happens without other additional materials, which in principle the recyclability of the board and from it deteriorated components would deteriorate. This is particularly important in the recycling of high-alloy steels.
  • the board can have several areas which show varying mechanical properties in order to be designed to be load-bearing.
  • Transition areas in which the mechanical properties change at least partially continuously The transitions, for example, between areas with the mechanical properties change at least partially continuously.
  • the transitions for example, between areas with the mechanical properties change at least partially continuously.
  • vortei Ihafte have Eigenscha ften and, for example, less prone to cracking.
  • the areas with varying mechanical properties of the board differ! Ie tensile strength, yield strength and / or elongation at break on.
  • the above object is achieved according to a third teaching of the present invention by a method for producing the metal strip made of steel, in which a slab made of steel by flexible
  • Cold rolling is provided with a subsequent annealing a metal strip with areas of varying metal strip thickness and the metal strip is cold rolled to a constant final thickness.
  • metal strips made of steel with varying metal strip thickness for cold rolling to final thickness are provided with a subsequent annealing a metal strip with areas of varying metal strip thickness and the metal strip is cold rolled to a constant final thickness.
  • Hot strip thickness have a rolling degree of more than 0% to give a constant final thickness of the metal strip.
  • Abwalzgrade of more than 50% a more difficult further processing of the metal strip
  • the degree of rolling in the areas with a lower hot strip thickness after quay twal 0% to 10%. At a degree of rolling of 0%, these areas of the metal strip remain unrolled and undergo no additional
  • the tensile strength can be achieved by the degree of rolling of these areas during Kaltwal zen is set to a maximum of 10%.
  • the desired tensile strength, yield strength and / or elongation at break, depending on the material, can thus be set via the abrading grade.
  • the method according to the invention can be further improved by removing from the metal strip after cold rolling and an optional organic and / or
  • inorganic coating of the finished rolled metal strip blanks are cut.
  • the cutting of the blanks can be done immediately after the cold rolling resp. take place on any scheduled coating operations.
  • a board according to the invention in vehicle construction, motor vehicle construction and rail vehicle construction, preferably as Reshaped structural component, solved. Due to the possibility of designing the board load-bearing, to use a uniform material and yet to provide varying strengths with constant wall thickness available, the board can be adapted particularly well for use in vehicle construction or on the structural component. The use also enables a particularly cost-effective production of load-balanced designed components,
  • Fig. 1 in a longitudinal section, the cross-sectional shape of a
  • FIG. 4 in a plan view a printed circuit board produced from the metal strip of the first exemplary embodiment
  • Fig. 5 in a longitudinal section another hot strip, which for producing a second
  • Embodiment of the metal strip according to the invention is used,
  • Fig. 7 in a diagram the associated tensile strength
  • FIG. 8 shows a top view of a circuit board according to the invention made from the metal strip according to FIG. 6.
  • Fig. 1 is. a hot strip 1, which has been hot rolled over the work rolls 7a, 7b by changing the roll gap during rolling, so that areas 2, 3, 4, 5, 6 are produced, which have different thicknesses. In the transition areas 3, 5 between the
  • the thickness change only by changing the position of a Häwal done ze.
  • the transition regions 3, 5 have been selected with a length of 50 mm, wherein the regions 2, 6 with a reduced hot strip thickness has a length of 200 mm and the region 4 with increased wall thickness has a length of about 800 mm.
  • wall thicknesses for example, 1, 8 mm are provided in the areas with reduced wall thickness and 2 mm in the areas with greater wall thickness.
  • Embodiment shows other aspect ratios are selected.
  • Fig. 2 shows the hot strip of Fig. 1 after the cold rolling.
  • the thickness of the metal strip 1 after cold rolling in the present embodiment is uniformly 1, 8 mm, so that the region with increased hot strip thickness 4 has a degree of rolling of about 10%. All other areas have one
  • the changes caused by the solidification depend strongly on the material, so that the values shown are specific to this material "X-IP1000".
  • Tensile strength and reduced yield strength Preferably, a periodic arrangement of these areas is provided, so that in a simple manner identical boards from the
  • Metal band can be produced.
  • a board is shown by way of example FIG. 4 in a plan view.
  • the board may have, for example, a width of 400 mm and a length of 1300 mm.
  • the areas 2 and 6 with reduced tensile strength and yield strength and increased elongation at break are 200 mm long, whereas the
  • Figs. 5 to 8 Another embodiment is shown in Figs. 5 to 8 explained.
  • the thickness of the hot strip 8 is for example in the range 9 1.7 mm and in the area eleventh
  • 100 mm transition region 10 of the board has a continuously increasing tensile strength or.
  • Area with the highest possible Abwalzgrad for example, be about 900 mm long.
  • the boards according to the invention from FIG. 4 and FIG. 8 can be used to components for vehicle construction, in particular to
  • Structural components are processed, whereby they are optimally adapted to the specific loads.
  • the boards before or after the conversion to a component nor with an organic and / or inorganic coating are processed, whereby they are optimally adapted to the specific loads.
  • the boards before or after the conversion to a component nor with an organic and / or inorganic coating are processed, whereby they are optimally adapted to the specific loads.
  • the boards before or after the conversion to a component nor with an organic and / or inorganic coating (not shown), for example a

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

La présente invention concerne une bande métallique fabriquée à partir d'acier par production d'un feuillard par laminage à chaud et laminage à froid de ladite bande métallique. L'invention concerne également une platine fabriquée à partir de ladite bande métallique, ainsi que son utilisation et un procédé de production de ladite bande métallique. L'objectif de l'invention est de disposer d'une bande métallique qui permette de produire de manière peu complexe des composants de faible poids qui sont adaptés à des contraintes spécifiques. Cet objectif est atteint par une bande métallique de ce type, qui présente une épaisseur constante après le laminage à froid et qui présente par endroits des régions avec des propriétés mécaniques variables. Selon l'invention, après le laminage à froid signifie que immédiatement après la fin du laminage à froid, c'est-à-dire sans traitement ultérieur, comme par exemple un traitement thermique, des régions avec des propriétés mécaniques variables sont présentes dans la bande métallique.
EP11702167A 2010-02-03 2011-01-25 Bande métallique ayant une epaisseur constantes présentant des différentes propriétés mécaniques Withdrawn EP2531308A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010000292.5A DE102010000292B4 (de) 2010-02-03 2010-02-03 Metallband hergestellt aus Stahl mit unterschiedlichen mechanischen Eigenschaften
PCT/EP2011/050984 WO2011095417A2 (fr) 2010-02-03 2011-01-25 Bande métallique présentant différentes propriétés mécaniques

Publications (1)

Publication Number Publication Date
EP2531308A2 true EP2531308A2 (fr) 2012-12-12

Family

ID=44237191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11702167A Withdrawn EP2531308A2 (fr) 2010-02-03 2011-01-25 Bande métallique ayant une epaisseur constantes présentant des différentes propriétés mécaniques

Country Status (5)

Country Link
US (1) US10155256B2 (fr)
EP (1) EP2531308A2 (fr)
CN (1) CN102740987B (fr)
DE (1) DE102010000292B4 (fr)
WO (1) WO2011095417A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104299B4 (de) * 2013-04-26 2016-02-18 Thyssenkrupp Steel Europe Ag Wirkmedienbasierte Tieftemperaturumformung
DE102013104298B4 (de) * 2013-04-26 2016-06-09 Thyssenkrupp Steel Europe Ag Tieftemperaturwalzprofilieren
DE102013104296B4 (de) * 2013-04-26 2016-02-25 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung eines Fahrwerkbauteils und Fahrwerkbauteil
DE102015112889A1 (de) * 2015-08-05 2017-02-09 Salzgitter Flachstahl Gmbh Hochfester manganhaltiger Stahl, Verwendung des Stahls für flexibel gewalzte Stahlflachprodukte und Herstellverfahren nebst Stahlflachprodukt hierzu
ITUB20160442A1 (it) * 2016-02-04 2017-08-04 Fiat Ricerche Procedimento per la laminazione di lamiere metalliche con spessore variabile
DE102016103539B4 (de) 2016-02-29 2018-09-20 Thyssenkrupp Ag Verfahren zur Herstellung eines mehrdimensional gefügestrukturierten, tiefziehfähigen Metallflachprodukts und Metallflachprodukt
ES2911429T3 (es) * 2017-10-10 2022-05-19 Outokumpu Oy Método para la deformación en frío parcial de acero con grosor homogéneo
EP3790999B1 (fr) * 2018-05-08 2023-08-09 Tata Steel IJmuiden B.V. Bande, feuille ou ébauche d'acier laminée de façon variable et son procédé de fabrication

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009095264A1 (fr) * 2008-01-30 2009-08-06 Corus Staal Bv Procédé de production d'un acier à plasticité induite par maclage, laminé à chaud, et produit en acier à plasticité induite par maclage produit à l'aide du procédé

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982104A (ja) * 1982-11-01 1984-05-12 Sumitomo Metal Ind Ltd 厚板の圧延方法
JPS61284533A (ja) * 1985-06-10 1986-12-15 Nippon Steel Corp 非調質高張力鋼板の製造方法
DE19840898C2 (de) * 1998-09-08 2000-06-29 Thyssenkrupp Stahl Ag Verfahren zum Herstellen belastungsoptimierter Stahlbänder
DE19846900C2 (de) * 1998-10-12 2000-08-10 Thyssenkrupp Stahl Ag Verfahren und Vorrichtung zum Herstellen eines Metallbandes für abzulängende Tailored Blanks
DE29913509U1 (de) 1999-08-03 1999-09-30 Achenbach Buschhuetten Gmbh Mehrwalzengerüst
US20030015263A1 (en) * 2000-05-26 2003-01-23 Chikara Kami Cold rolled steel sheet and galvanized steel sheet having strain aging hardening property and method for producing the same
DE10041280C2 (de) 2000-08-22 2003-03-06 Muhr & Bender Kg Verfahren und Vorrichtung zum flexiblen Walzen eines Metallbandes
DE10107027A1 (de) 2001-02-15 2002-09-12 Thyssenkrupp Stahl Ag Verfahren zum Herstellen von metallischen Bändern mit Abschnitten unterschiedlicher Materialeigenschaften
NL1018817C2 (nl) * 2001-08-24 2003-02-25 Corus Technology B V Werkwijze voor het bewerken van een continu gegoten metalen plak of band, en aldus vervaardigde plaat of band.
FR2868084B1 (fr) * 2004-03-23 2006-05-26 Pechiney Rhenalu Sa Element de structure pour construction aeronautique presentant une variation des proprietes d'emploi
DE102004054444B3 (de) * 2004-08-10 2006-01-19 Daimlerchrysler Ag Verfahren zur Herstellung von Stahlbauteilen mit höchster Festigkeit und Plastizität
EP1807542A1 (fr) * 2004-11-03 2007-07-18 ThyssenKrupp Steel AG Bande ou tole d'acier extremement resistante a proprietes twip et procede de fabrication de ladite bande a l'aide de la "coulee directe de bandes"
DE102004053917B3 (de) * 2004-11-05 2006-04-13 Benteler Automobiltechnik Gmbh Seitenwand eines Kraftfahrzeugs
ES2404006T3 (es) * 2005-04-29 2013-05-23 Autotech Engineering, A.I.E. Traviesa de refuerzo de parachoques
DE102005031461A1 (de) * 2005-07-04 2007-01-11 Bilstein Gmbh & Co. Kg Verfahren zur Herstellung eines mikrolegierten Kaltbandes mit einem auf den Dickenverlauf abgestimmten Eigenschaftsprofil
FR2900160B1 (fr) * 2006-04-21 2008-05-30 Alcan Rhenalu Sa Procede de fabrication d'un element de structure pour construction aeronautique comprenant un ecrouissage differentiel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009095264A1 (fr) * 2008-01-30 2009-08-06 Corus Staal Bv Procédé de production d'un acier à plasticité induite par maclage, laminé à chaud, et produit en acier à plasticité induite par maclage produit à l'aide du procédé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011095417A2 *

Also Published As

Publication number Publication date
WO2011095417A2 (fr) 2011-08-11
CN102740987A (zh) 2012-10-17
DE102010000292B4 (de) 2014-02-13
WO2011095417A3 (fr) 2011-10-13
DE102010000292A1 (de) 2011-08-04
US10155256B2 (en) 2018-12-18
US20120328899A1 (en) 2012-12-27
CN102740987B (zh) 2016-03-30

Similar Documents

Publication Publication Date Title
DE102010000292B4 (de) Metallband hergestellt aus Stahl mit unterschiedlichen mechanischen Eigenschaften
EP2690183B1 (fr) Produit plat en acier laminé à chaud et son procédé de fabrication
EP3200950B1 (fr) Produit plat multicouché en acier et composant fabriqué de ce produit
EP1918406B1 (fr) Procédé pour la fabrication de produits plats à partir d'un acier à plusieurs phases micro-allié en bore
DE3323255C2 (fr)
DE102014008718B3 (de) Maßgeschneidertes Halbzeug und Kraftfahrzeugbauteil
DE10041280C2 (de) Verfahren und Vorrichtung zum flexiblen Walzen eines Metallbandes
EP2271541A1 (fr) Utilisation d'un matériau composite métallique dans une structure de véhicule
WO2013037918A1 (fr) Matériau composite d'aluminium comportant une couche centrale en alliage almgsi
DE102016204567A1 (de) Verfahren zum Herstellen eines warmwalzplattierten Werkstoffverbundes, Flachproduktpaket, warmwalzplattierter Werkstoffverbund sowie seine Verwendung
WO2000021695A1 (fr) Procede et dispositif permettant de produire une bande metallique destinee a des flans sur mesure a decouper
EP2406404B1 (fr) Procédé de production d'un feuillard à chaud par coulée horizontale à partir d'acier ferritique
EP1200253B2 (fr) Procede de production d'un materiau composite en aluminium
EP1398390B1 (fr) Acier ferritique-martensitique possédant une resistance élevée ayant une fine microstructure
DE2933670C2 (de) Hochzugfeste Stahlbleche und Verfahren zu deren Herstellung
DE102007056645B4 (de) Schweller eines Kraftfahrzeugs und Kraftfahrzeug
DE10202212B4 (de) Verfahren zum Erzeugen von aus metallischem Verbundwerkstoff bestehendem Band oder Blech
EP2838726A1 (fr) Procédé de fabrication de tôles légères sur mesure
EP1918404B1 (fr) Procédé pour la fabrication de produits plats à partir d'un acier à plusieurs phases allié en aluminium
WO2017054862A1 (fr) Pièce en acier possédant une qualité de surface améliorée
EP2959985B1 (fr) Poutre profilée en feuillard laminé à froid ayant une résistance à la flexion accrue et son procédé de production
DE60004094T2 (de) Kaltgeformte, flachgewalzte stahlprofile
WO2019101616A1 (fr) Ensemble de produits plats, procédé servant à fabriquer un matériau composite et utilisation associée
EP1204771B1 (fr) Demi-produits et produits finis en acier fin austenitique et procede de fabrication desdits produits
DE102017127672A1 (de) Fahrzeugrahmenteil

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

17P Request for examination filed

Effective date: 20120614

AK Designated contracting states

Kind code of ref document: A2

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

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20131113

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20191002

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20200212