[go: up one dir, main page]

WO2006119998A1 - Procede et appareil permettant de produire une bande a epaisseur variable - Google Patents

Procede et appareil permettant de produire une bande a epaisseur variable Download PDF

Info

Publication number
WO2006119998A1
WO2006119998A1 PCT/EP2006/004453 EP2006004453W WO2006119998A1 WO 2006119998 A1 WO2006119998 A1 WO 2006119998A1 EP 2006004453 W EP2006004453 W EP 2006004453W WO 2006119998 A1 WO2006119998 A1 WO 2006119998A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
speed
tension
mill
stand
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.)
Ceased
Application number
PCT/EP2006/004453
Other languages
English (en)
Inventor
Willem Cornelis Verloop
Ralf Christian Octavie Gerardus Prevaas
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.)
Tata Steel Ijmuiden BV
Original Assignee
Corus Staal BV
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 Corus Staal BV filed Critical Corus Staal BV
Priority to EP06753573A priority Critical patent/EP1893361A1/fr
Priority to US11/913,839 priority patent/US20080223100A1/en
Publication of WO2006119998A1 publication Critical patent/WO2006119998A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/06—Product speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control

Definitions

  • the invention relates to a method for producing strip having a variable thickness in its length direction, in particular a repetitive thickness variation, using a stand of a rolling mill, wherein the strip has a thickness Dl when entering the mill stand and a thickness D2 when leaving the mill stand.
  • the invention also relates to an apparatus for producing such strip material.
  • the rolling speed of the rolls of the stand of the rolling mill is the reference speed for the rolling, which stand speed is controlled by a speed controller.
  • the speed of the other mill equipment, such as the coiler and decoiler is controlled using the stand speed as input.
  • tension controllers measuring the tension in the strip change the reference rotational speed of the coiler and decoiler relative to the stand speed. The speed of the strip entering the mill and the speed of the strip leaving the mill will change accordingly.
  • the thickness of the strip has to be changed fast and the change in the thickness D2 of the strip leaving the mill stand can be up to 50%. Due to the change in thickness the speed of the strip leaving the mill stand changes according to mass flow preservation. As a second effect, due to the change in thickness of the strip the motor speed of the mill stand will change temporarily due to a change in the required rolling torque. This change in mill speed affects the speed of both the strip entering and the speed of the strip leaving the mill stand. For instance when the thickness of the strip leaving the mill stand is reduced this change is felt, since at that moment in time more energy is required for rolling the strip.
  • at least one of these objects is reached by executing a method for producing strip having a variable thickness in its length direction, in particular a repetitive thickness variation, using a stand of a rolling mill, wherein the strip has a thickness Dl when entering the mill stand and a thickness D2 when leaving the mill stand, wherein the speed of the strip when leaving the mill stand is used as an input to control the speed of the rolls in the mill stand.
  • This method uses a control mechanism using the speed of the strip leaving the mill stand to control the speed of the rolls in the mill stand, which makes it more easy to control the rolling mill.
  • the change in speed of the strip leaving the mill stand when the thickness of the strip leaving the mill is changed is now used to control the change in speed of the rolls in the mill stand.
  • the speed changes upstream of the strip leaving the rolling mill are thus more naturally a result of the change in speed due to the change in thickness of the strip.
  • the strip between the mill stand and equipment downstream of the strip is kept at a certain tension, the tension of the strip being used as an input for controlling the speed of the mill stand and/or the speed of the downstream equipment.
  • Both the speed and the tension in the strip leaving the mill stand can now be used to control the speed of the rolls in the mill stand, the speed of the strip controlling the general speed of the rolls in the mill stand, and the tension in the strip being used to fine-tune the speed of the rolls in the mill stand.
  • the tension in the strip can also be used to control the speed of downstream equipment such as a coiler.
  • the speed of the strip leaving the mill stand is kept approximately constant.
  • the constant speed of the strip leaving the roll stand also provides a natural change in the speed of the rolls in the roll stand when the thickness D2 of the strip is changed; for instance, when the thickness D2 of the strip leaving the roll stand is reduced and the speed of this strip is kept constant, the speed of the strip entering the mill stand must be reduced. This means that the rolling speed of the rolls in the mill stand must be reduced, which is in line with the higher rolling torque required for rolling the strip to the reduced thickness D2.
  • the strip leaving the mill stand is given a repetitive thickness variation having a repeating profile length of at most 4 meter. From such a strip it is possible to cut profiled lengths from which tailor rolled blanks (TRBs) can be produced.
  • TRBs tailor rolled blanks
  • a program is provided for determining the thickness D2 in the strip, the program controlling the gap of the mill stand.
  • This program thus is the input for producing the strip having a variable thickness, and the resulting strip leaving the mill stand provides the speed of the strip with which the speed of the rolls in the mill stand is controlled.
  • Another program is provided for controlling the speed of the strip when entering the mill stand.
  • This program can change the speed of the strip entering the mill stand when the gap of the mill stand is changed.
  • the speed of the upstream equipment is changed to change the speed of the strip entering the mill stand.
  • a decoiler is used to supply the strip to the rolling mill and a coiler is used to take up the rolled strip, wherein a first tension measuring device is present to measure the tension in the strip entering the rolling mill and a second tension measuring device is present to measure the tension in the strip leaving the rolling mill, wherein a speed measuring device is present to control the speed of the strip leaving the rolling mill, wherein the speed and tension measured with the speed measuring device and the second tension measuring device are used as input to control the rolling speed of the rolling mill.
  • control uses the speed and tension of the strip leaving the rolling mill, and the measuring devices for measuring this speed and tension are state of the art.
  • the speed and tension measured with the speed measuring device, the first tension measuring device and the second tension measuring device are used as input to control the tension in the strip entering the rolling mill using a dancer or equivalent equipment between the decoiler and the rolling mill.
  • the same measurements together with the measurement of the tension using the first tension measuring device can be used to control the entrance speed of the strip in the rolling mill.
  • the speed and tension measured with the speed measuring device, the first tension measuring device and the second tension measuring device are used as input to control the decoiling speed of the decoiler. All the important equipment upstream of the produced strip is thus controlled using these measurements.
  • the rolling mill used is a single stand rolling mill.
  • a single stand rolling mill makes the control of the rolling mill easier, since a mill having two or more stands requires a very accurate control of the stands in relation to each other, or requires the use of loopers between the stands.
  • an apparatus for producing strip having a variable thickness in its length direction comprising a stand of a rolling mill, upstream equipment, downstream equipment, a tension measuring device for measuring the tension in the strip leaving the mill stand and/or a speed measuring device for controlling the speed of the strip leaving the mill stand, wherein a dancer or looper or equivalent equipment has been placed between the upstream equipment and the mill stand to accommodate changes in strip length, and wherein no dancer or looper or equivalent equipment has been placed between the mill stand and the downstream equipment.
  • the apparatus it is possible to produce strip having a variable thickness in a well controlled way according to the first aspect of the invention.
  • the apparatus is more simple than the known apparatus for producing strip having a variable thickness, because only one dancer or looper needs to be used.
  • a further tension measuring device has been provided for measuring the tension in the strip entering the mill stand.
  • the further tension measuring device can be used to control the dancer or looper or equivalent equipment between the upstream equipment and the mill stand and the upstream equipment, such as a decoiler.
  • the invention will be elucidated hereinafter.
  • this change will thus last at least 0.025 seconds. Should this change in thickness be performed over a strip length of 25 mm, the maximum rolling speed of the rolling mill thus has to be 1 m/s. For this example, we neglect slip.
  • the coiling speed is kept constant and the driving system of the rolling stand is decelerated, so as to keep the speed difference in the coiler to a minimum.
  • the driving system of the rolling mill is usually heavier than the drive of a coiler, and the inertia of such a driving system can be approximately 600 kgm 2 .
  • the required deceleration is the same as the acceleration of the coiler. When a work roll diameter of 300 mm is used, the deceleration needs 8000 Nm less torque. On the other hand, for the increased reduction in the strip leaving the rolling mill extra torque is needed. These changes in torque will balance each other more or less, resulting in an approximately even torque needed for the driving system of the rolling mill when producing strip having a variable thickness in length direction.

Landscapes

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

Abstract

L'invention concerne un procédé de production d'une bande d'épaisseur variable dans le sens de la longueur, notamment une variation d'épaisseur répétitive, au moyen d'une cage d'un laminoir, la bande présentant une épaisseur Dl à l'entrée dans la cage du laminoir et une épaisseur D2 à la sortie de celui-ci. Selon l'invention, la vitesse de la bande à la sortie de la cage du laminoir est utilisée comme entrée pour commander la vitesse des rouleaux dans la cage du laminoir. L'invention concerne également un appareil de production de bande à épaisseur variable.
PCT/EP2006/004453 2005-05-11 2006-05-11 Procede et appareil permettant de produire une bande a epaisseur variable Ceased WO2006119998A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06753573A EP1893361A1 (fr) 2005-05-11 2006-05-11 Procede et appareil permettant de produire une bande a epaisseur variable
US11/913,839 US20080223100A1 (en) 2005-05-11 2006-05-11 Method and Apparatus for Producing Strip Having a Variable Thickness

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05076114 2005-05-11
EP05076114.7 2005-05-11

Publications (1)

Publication Number Publication Date
WO2006119998A1 true WO2006119998A1 (fr) 2006-11-16

Family

ID=35063079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/004453 Ceased WO2006119998A1 (fr) 2005-05-11 2006-05-11 Procede et appareil permettant de produire une bande a epaisseur variable

Country Status (3)

Country Link
US (1) US20080223100A1 (fr)
EP (1) EP1893361A1 (fr)
WO (1) WO2006119998A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009049964A1 (fr) * 2007-10-12 2009-04-23 Siemens Aktiengesellschaft Procédé d'exploitation permettant d'introduire un produit à laminer dans une cage d'un laminoir, dispositif de commande, support de données et laminoir conçu pour laminer un produit à laminer en forme de bande
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
CN106391729A (zh) * 2016-11-04 2017-02-15 东北大学 一种plp带材定长传送的测量装置及方法
CN112605124A (zh) * 2020-11-27 2021-04-06 广州普德机电设备有限公司 一种连续变截面薄钢板的轧制设备及成型方法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8893537B2 (en) * 2007-11-07 2014-11-25 The Bradbury Company, Inc. Methods and apparatus to drive material conditioning machines
WO2012048153A1 (fr) 2010-10-06 2012-04-12 The Bradbury Company, Inc. Appareil et procédés pour accroître le rendement de systèmes de laminage de profilés et de planage
CN104338752B (zh) * 2013-07-24 2016-08-10 宝山钢铁股份有限公司 一种变厚度轧制时的长度控制方法
CN104338748B (zh) * 2013-07-24 2016-04-27 宝山钢铁股份有限公司 一种用于变厚度带材轧制的两道次轧制方法
CN104084448B (zh) * 2014-06-16 2016-03-16 中国重型机械研究院股份公司 一种用于重卷剖分机组双卷取机的同步控制系统
CN104690094B (zh) * 2015-03-20 2017-03-08 北京汽车股份有限公司 一种连续变厚度板的成型方法
US10618107B2 (en) 2016-04-14 2020-04-14 GM Global Technology Operations LLC Variable thickness continuous casting for tailor rolling
CN106623440B (zh) * 2016-12-05 2019-02-22 一重集团大连设计研究院有限公司 一种变断面冷轧板轧制方法及装置
DE102019215265A1 (de) * 2018-12-06 2020-06-10 Sms Group Gmbh Verfahren zum Betreiben eines Walzgerüstes zum Stufenwalzen
IT202000000316A1 (it) * 2020-01-10 2021-07-10 Danieli Off Mecc Metodo ed apparato di produzione di prodotti metallici piani
JP7518385B2 (ja) * 2021-01-05 2024-07-18 日本製鉄株式会社 処理装置、処理方法、およびプログラム

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56114519A (en) * 1980-02-16 1981-09-09 Nippon Steel Corp Looper controller for continuous rolling mill
DE3408807A1 (de) * 1983-03-15 1984-09-27 Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo Vorrichtung zur steuerung der voreilung
JPH07251207A (ja) * 1994-03-16 1995-10-03 Mitsubishi Heavy Ind Ltd 圧延機
WO1999024183A1 (fr) * 1997-11-07 1999-05-20 Siemens Aktiengesellschaft Procede et dispositif permettant de laminer une bande d'epaisseur variable
WO1999024138A1 (fr) 1997-11-12 1999-05-20 Life Technologies, Inc. Dispositif et techniques permettant de purifier des molecules biologiques en n'utilisant que de faibles quantites de milieux chromatographiques et adsorbants
WO2003008122A1 (fr) * 2001-07-11 2003-01-30 Sms Demag Aktiengesellschaft Laminoir a froid et procede de laminage a froid d'une bande metallique
EP1454681A2 (fr) * 2003-03-07 2004-09-08 Sundwig GmbH Dispositif et procédé pour le laminage de bandes métalliques
EP1461415A2 (fr) 2001-06-18 2004-09-29 Pig Improvement Company UK Limited Systeme de filtration
EP1464415A2 (fr) * 2003-04-03 2004-10-06 Muhr und Bender KG Procédé et installation pour le laminage de bandes métalliques

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688532A (en) * 1970-11-24 1972-09-05 Antonio Vicente Silva Control system for tandem rolling mill based on the constant volume principle
BE788725A (fr) * 1971-09-14 1973-03-12 Westinghouse Electric Corp Systeme de regulation hydraulique de la tension entre les cageset de reglage automatique de l'epaisseur pour laminoirs multi-cages
US3852983A (en) * 1973-04-25 1974-12-10 Westinghouse Electric Corp Work strip gauge change during rolling in a tandem rolling mill
US4248072A (en) * 1978-07-25 1981-02-03 Aichi Steel Works, Limited Method of and apparatus for producing plate material having uniform width and lengthwise thickness variation
CH637047A5 (de) * 1978-12-29 1983-07-15 Lauener W F Ag Verfahren zur geschwindigkeitssteuerung einer bandgiess- und walzanlage und gemaess diesem verfahren gesteuerte anlage.
JPS6227271A (ja) * 1985-07-25 1987-02-05 Mitsubishi Electric Corp 連続処理設備の速度制御装置
US4656856A (en) * 1985-10-23 1987-04-14 Bethlehem Steel Corporation Method and apparatus for eliminating crescent formation in a reduction mill
US4907433A (en) * 1988-04-18 1990-03-13 Bethlehem Steel Corporation Apparatus and method for adaptive control of a rolling mill
US5103662A (en) * 1990-05-01 1992-04-14 Allegheny Ludlum Corporation Tandem rolling mill tension control with speed ratio error discrimination
US5787746A (en) * 1994-07-25 1998-08-04 Alcan Aluminum Corporation Multi-stand hot rolling mill tension and strip temperature multivariable controller
JPH08150408A (ja) * 1994-11-25 1996-06-11 Toshiba Corp ルーパ制御装置
JP2001137921A (ja) * 1999-11-12 2001-05-22 Kobe Steel Ltd 圧延機の板厚制御装置
US6263714B1 (en) * 1999-12-27 2001-07-24 Telepro, Inc. Periodic gauge deviation compensation system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56114519A (en) * 1980-02-16 1981-09-09 Nippon Steel Corp Looper controller for continuous rolling mill
DE3408807A1 (de) * 1983-03-15 1984-09-27 Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo Vorrichtung zur steuerung der voreilung
JPH07251207A (ja) * 1994-03-16 1995-10-03 Mitsubishi Heavy Ind Ltd 圧延機
WO1999024183A1 (fr) * 1997-11-07 1999-05-20 Siemens Aktiengesellschaft Procede et dispositif permettant de laminer une bande d'epaisseur variable
WO1999024138A1 (fr) 1997-11-12 1999-05-20 Life Technologies, Inc. Dispositif et techniques permettant de purifier des molecules biologiques en n'utilisant que de faibles quantites de milieux chromatographiques et adsorbants
EP1461415A2 (fr) 2001-06-18 2004-09-29 Pig Improvement Company UK Limited Systeme de filtration
WO2003008122A1 (fr) * 2001-07-11 2003-01-30 Sms Demag Aktiengesellschaft Laminoir a froid et procede de laminage a froid d'une bande metallique
EP1454681A2 (fr) * 2003-03-07 2004-09-08 Sundwig GmbH Dispositif et procédé pour le laminage de bandes métalliques
EP1464415A2 (fr) * 2003-04-03 2004-10-06 Muhr und Bender KG Procédé et installation pour le laminage de bandes métalliques

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 005, no. 193 (M - 101) 9 December 1981 (1981-12-09) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 02 29 February 1996 (1996-02-29) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009049964A1 (fr) * 2007-10-12 2009-04-23 Siemens Aktiengesellschaft Procédé d'exploitation permettant d'introduire un produit à laminer dans une cage d'un laminoir, dispositif de commande, support de données et laminoir conçu pour laminer un produit à laminer en forme de bande
US9050637B2 (en) 2007-10-12 2015-06-09 Siemens Aktiengesellschaft Operating method for introducing a product to be rolled into a roll stand of a roll mill, control device, data carrier, and roll mill for rolling a strip-type product to be rolled
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
CN106391729A (zh) * 2016-11-04 2017-02-15 东北大学 一种plp带材定长传送的测量装置及方法
CN112605124A (zh) * 2020-11-27 2021-04-06 广州普德机电设备有限公司 一种连续变截面薄钢板的轧制设备及成型方法
CN112605124B (zh) * 2020-11-27 2022-07-05 苏州吉润汽车零部件有限公司 一种连续变截面薄钢板的轧制设备及成型方法

Also Published As

Publication number Publication date
EP1893361A1 (fr) 2008-03-05
US20080223100A1 (en) 2008-09-18

Similar Documents

Publication Publication Date Title
US20080223100A1 (en) Method and Apparatus for Producing Strip Having a Variable Thickness
CN101600521B (zh) 驱动卷取或退卷金属带的卷取装置的方法和相应控制装置和卷取装置
US6810706B2 (en) Apparatus for reducing tension variations in a metal strip
CN113042540B (zh) 一种极薄钢带卷取张力控制方法
US4335435A (en) Method of changing rolling schedule during rolling in tandem rolling mill
RU2220799C2 (ru) Горячепрокатный стан стеккеля
JP2008238249A (ja) 圧延形状制御方法および圧延形状制御システム
JP2021079411A (ja) 巻取制御装置、コイラー、巻取制御方法および熱間圧延金属帯の製造方法
US4063438A (en) Method of controlling tandem rolling mills
JP2012183578A (ja) 冷間圧延機の板厚制御方法及び板厚制御装置
JP2022510024A (ja) 段階的圧延のための圧延スタンドの作動のための方法
JP4796483B2 (ja) 冷間圧延における板厚・平坦度制御方法
KR100979038B1 (ko) 다단 사상압연기에서의 스트립 테일부의 꼬임 방지 압연방법
EP0032766B1 (fr) Procédé et dispositif pour laminer des longueurs de barres ou de fils métalliques
KR20180072399A (ko) 스트립 권취 장치
JP5085226B2 (ja) 条鋼線材の巻き取り方法
JPH07236916A (ja) 連続冷間圧延機の出側張力制御方法および装置
JPH08141618A (ja) 連続圧延機における形状制御方法およびその装置
JP2000280014A (ja) 圧延方法及び圧延設備
JPH0688171B2 (ja) ストリツプコイルの自動分割および自動減速停止方法
JP2006007298A (ja) 連続圧延設備における速度設定方法
JPH10263612A (ja) ２スタンドコールドミルの圧延方法と圧延制御装置
KR19980023433A (ko) 열연 스트립의 권취제어방법
JPH0313922B2 (fr)
CN1053399C (zh) 单机座轧带机及其控制方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2006753573

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 5097/CHENP/2007

Country of ref document: IN

NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Ref document number: DE

NENP Non-entry into the national phase

Ref country code: RU

WWW Wipo information: withdrawn in national office

Ref document number: RU

WWP Wipo information: published in national office

Ref document number: 2006753573

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 11913839

Country of ref document: US