EP1529122A2 - Procede et dispositif de patentage de fils en acier - Google Patents
Procede et dispositif de patentage de fils en acierInfo
- Publication number
- EP1529122A2 EP1529122A2 EP03756923A EP03756923A EP1529122A2 EP 1529122 A2 EP1529122 A2 EP 1529122A2 EP 03756923 A EP03756923 A EP 03756923A EP 03756923 A EP03756923 A EP 03756923A EP 1529122 A2 EP1529122 A2 EP 1529122A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- cooling
- wire
- curtains
- liquid
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 230000009466 transformation Effects 0.000 claims abstract description 24
- 239000000110 cooling liquid Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000002826 coolant Substances 0.000 claims description 21
- 238000012423 maintenance Methods 0.000 claims description 11
- 230000001174 ascending effect Effects 0.000 claims description 6
- 229910000734 martensite Inorganic materials 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000010791 quenching Methods 0.000 abstract description 4
- 230000000171 quenching effect Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000007654 immersion Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/64—Patenting furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
Definitions
- the present invention relates to a method and a device for patenting at least one steel wire comprising
- This process offers the advantage that the contact between the coolant and the wire is direct, without the possibility of the formation of a vapor film around the wire, a film where the heat exchange is significantly less. favorable. Given the wire running speed combined with the flow speed of each curtain transverse to the wire running direction, the coolant does not have time to form a film of vapor around the wire and exchange Liquid thermal-steel wire remains excellent. Simultaneously the process offers the advantage of being able to stop the cooling at any desired temperature by a simple determination of the number of curtains necessary. This is particularly important in the case of patenting steel wires, where it is necessary to avoid too rapid quenching which gives rise to the appearance of martensite in the steel, which is to be avoided in most cases.
- the method comprises a projection from the bottom of said curtains in a turbulent upward flow.
- the coolant is sprayed under pressure like a continuous geyser and therefore very turbulent.
- the curtains with ascending turbulent flow have a vertex and the method further comprises, from said vertex and at least on one side of each curtain with ascending turbulent flow, a drop of turbulent flow liquid through which also scrolls said at least one steel wire.
- the wire can therefore pass through three successive streams of liquid with turbulent flow, one ascending and the other two descending, which makes the ensuing cooling very effective.
- the method comprises injecting pressurized gas bubbles into a mass of coolant, in an upwardly guided manner, and entraining said liquid by said bubbles in the form said curtains projected according to said upward turbulent flow.
- a mass of coolant Preferably use an inert gas with respect to steel, and in particular air.
- the air bubbles under pressure entrain the coolant and simultaneously make its flow turbulent, which promotes the desired direct heat exchange.
- the upward projection by air bubbles does not require an expensive energy expenditure and it makes it possible to avoid any pumping system for the coolant.
- the coolant can be any suitable liquid, water, liquid salt, a polymer, oil, and in particular water, because all the disadvantages encountered by the use of water in the prior art can be overcome by the process according to the invention.
- the process therefore takes the form of a simple process that is easy to control and adjust and allows consumption of only non-polluting and inexpensive materials, that is to say compressed air and cooling water.
- the present invention also relates to a device for implementing the method according to the invention.
- a device for implementing the method according to the invention.
- Such a device comprises - a furnace for austenitizing said at least one steel wire, - means for driving the said at least one steel wire to run, means for projecting at least one curtain of cooling liquid in which the latter has a turbulent flow oriented substantially transversely to said at least one running wire, in order to cool the latter in a liquid medium to said cooling temperature situated at below the austenitization temperature and above the martensitic transformation temperature, and
- this device also comprises
- the device comprises a tank containing the coolant which is arranged below said at least one running wire and means for projecting the curtains of said liquid in a turbulent upward flow. It is of course also possible to provide a tank arranged above the scrolling son and the fall or projection of curtains of coolant from the top.
- the temperature maintenance chamber is mounted so as to be able to move horizontally over the tank according to the number of curtains of liquid in service.
- FIG. 1 represents a view in longitudinal section of a device for cooling steel wires to be used in a patenting method according to the invention.
- FIG. 2 represents a plan view from above of FIG. 1.
- FIG. 3 represents a schematic view of an installation for the patenting of steel wires implementing the method according to the invention.
- FIGs 1 and 2 there is shown a tank 1 containing cooling water 2. Above this tank scrolls one or more steel wires 3 in a direction of travel indicated by the arrow 4, these wires preferably having a section with a diameter of less than 15 mm. Common scrolling drive means are represented schematically by the references 23 and 24.
- the water can be supplied by an inlet 5 and be discharged from above by an overflow 6. In the tank illustrated the height of water column is approximately 750mm H 2 O (7350 Pa).
- the overflow 6 can be in communication with a lower inlet 5 ′, by means of a heat exchanger not shown, so as to put the cooling water into circulation.
- the tank also includes means for projecting rising water curtains.
- projection means comprise air supply ducts 7 to 9 arranged at the bottom of the tank parallel to each other and transversely to the direction of travel of the wires.
- Each of these conduits is connected, through corresponding openings in the tank and by means of fittings 10 to 12, to a distributor duct 13 supplied with pressurized air by a fan 14.
- a shut-off valve 22 On each fitting 10 to 12 is provided a shut-off valve 22 which makes it possible to adjust the supply of pressurized air to the conduits 7 to 9 and to put them on or off as required.
- the air supply ducts 7 to 9 are perforated and therefore supply, in the tank water, air bubbles under pressure.
- two guide plates 15 and 16 are supported by the longitudinal walls 38 and 39 of the tank so as to pass through it from one side.
- the guide plates are not far apart and thus form a thin outlet slot.
- the guide plates 15 and 16 have a spacing clearly greater than that presented at their top. The guide plates thus form a kind of roof between the two sides of which the bubbles are forcedly guided upwards.
- the air bubbles entrain the water of the tank during their ascent and expel a curtain of turbulent water 17 upwards.
- a pressure of the order of 1000 mm of H 2 O (9806 Pa) for example the air bubbles entrain the water of the tank during their ascent and expel a curtain of turbulent water 17 upwards.
- the top of the water curtain it can be split in two and form two turbulent waterfalls 18 and 19 that the wire to be cooled must also pass through.
- the pairs of guide plates 15, 16 can be arranged sufficiently tightly in their succession so that the waterfalls of two neighboring curtains can cross. Of in this way, the wire runs continuously in water, and yet there is never the possibility of the formation of a film of water vapor around the wire.
- FIG 3 there is shown schematically an installation for patenting steel wires.
- This installation comprises, before the wires are cooled, a unit for heating the wires, for example as described in patent application WO01 / 73141.
- the heating unit consists of a fluidized bed oven 25 in which a web of wires 26 continuously scrolls in the direction of travel 27.
- the wires exit from this oven at an austenitization temperature, for example d 'about 950 ° C, and they then pass through a temperature equalization device 28 where the acquired wire temperature is maintained, in the case illustrated by recycling the burnt gases from the oven 25 through the conduit 29.
- the dissolution of carbides (cementite) is accomplished in this device 28 and the wires are then passed through the cooling device according to the invention 30.
- heating unit and the temperature maintenance device are not critical according to the invention and that they can be arranged in any suitable way to obtain a wire at the austenitization temperature.
- the cooling device 30, arranged for example as provided in Figures 1 and 2, allows the formation of several curtains of ascending water, turbulent, through which passes the sheet of son 26, without requiring deflection of the son. In the example illustrated, only 10 curtains were put into service while the tank allows the formation of 20.
- TTT curves transformation, temperature, time
- the wires are located opposite the nose of the S-curves, that is to say at a temperature corresponding to the minimum incubation time, to pass through these curves, which makes it possible to avoid disturbances that could influence the structure of the steel.
- a temperature holding chamber 31 is then provided for the wires which is capable of moving horizontally, for example as described in Belgian patent BE-A-838796.
- the chamber 31 is supported on a table 32 by rollers 33.
- Its inlet 34 is brought over the tank 30 and the sheet of wires, up to just behind the last curtain of water put into service, seen in the direction of scrolling wires.
- deflection rollers 35 and 36 the sheet of wires is deflected through the chamber 31 which, by electrical resistors 37 for example, is maintained at the temperature reached by the wires after passing through the last curtain of water, for example 580 ° C.
- the steel has preferably not yet reached the pearlitic transformation curves known as S. can then pass through them isothermally, possibly with a slight spontaneous rise in temperature at the start of processing, for example up to 600 ° C., and this out of contact with any coolant and without any intermediate cooling or reheating step in a gaseous medium.
- the rapid cooling obtained by the water curtains was stopped at the desired temperature, which is reached depending on the number of curtains put into service.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2002/0372A BE1014868A3 (fr) | 2002-06-06 | 2002-06-06 | Procede et dispositif de patentage de fils d'acier |
BE200200372 | 2002-06-06 | ||
PCT/BE2003/000102 WO2003104501A2 (fr) | 2002-06-06 | 2003-06-05 | Procede et dispositif de patentage de fils en acier |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1529122A2 true EP1529122A2 (fr) | 2005-05-11 |
EP1529122B1 EP1529122B1 (fr) | 2012-04-18 |
Family
ID=29721151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03756923A Expired - Lifetime EP1529122B1 (fr) | 2002-06-06 | 2003-06-05 | Procede et dispositif de patentage de fils en acier |
Country Status (10)
Country | Link |
---|---|
US (1) | US7354493B2 (fr) |
EP (1) | EP1529122B1 (fr) |
JP (1) | JP4851712B2 (fr) |
KR (1) | KR100941675B1 (fr) |
CN (1) | CN100370038C (fr) |
AT (1) | ATE554191T1 (fr) |
AU (1) | AU2003232530A1 (fr) |
BE (1) | BE1014868A3 (fr) |
CA (1) | CA2488156C (fr) |
WO (1) | WO2003104501A2 (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080011394A1 (en) * | 2006-07-14 | 2008-01-17 | Tyl Thomas W | Thermodynamic metal treating apparatus and method |
BE1018675A3 (fr) | 2009-03-03 | 2011-06-07 | Fib Belgium Sa | Dispositif de dosage d'un melange gazeux. |
AT509356B1 (de) * | 2010-02-04 | 2011-12-15 | Cpa Comp Process Automation Gmbh | Vorrichtung und verfahren zum wärmebehandeln von stahldrähten |
ES2365462B1 (es) * | 2010-03-24 | 2012-08-10 | Automat Industrial S.L. | Procedimiento y dispositivo para el patentado de alambre por transferencia de calor por radiación-convección. |
CN101914661B (zh) * | 2010-09-05 | 2012-07-04 | 无锡市盛力达机械工程有限公司 | 气体保护水基淬火装置 |
CN101967549B (zh) * | 2010-11-01 | 2012-06-06 | 苏闽(张家港)新型金属材料科技有限公司 | 带丝板 |
TR201810002T4 (tr) | 2010-12-23 | 2018-08-27 | Bekaert Sa Nv | Bir çelik telin sürekli olarak üretilmesine yönelik proses ve teçhizat. |
CN107653364B (zh) * | 2013-02-01 | 2019-07-05 | 贝卡尔特公司 | 粗钢丝的强制水冷 |
CN104263899B (zh) * | 2014-10-14 | 2016-06-29 | 海城正昌工业有限公司 | 一种细钢丝正火工艺及装置 |
JP7029458B2 (ja) * | 2017-01-12 | 2022-03-03 | エンベー ベカルト ソシエテ アノニム | 無鉛パテンティングプロセスおよび設備 |
CN108396127A (zh) * | 2017-02-08 | 2018-08-14 | 鞍钢股份有限公司 | 一种在edc水槽中加气泡生产免铅浴线材的方法 |
WO2020099688A1 (fr) | 2018-11-14 | 2020-05-22 | Druids Process Technology, S.L. | Dispositif et procédé de refroidissement pour refroidir un fil et installation de traitement de fil correspondant |
WO2020158704A1 (fr) | 2019-01-31 | 2020-08-06 | 東京製綱株式会社 | Procédé d'échange de chaleur, milieu d'échange de chaleur, dispositif d'échange de chaleur, procédé de patentage et fil d'acier au carbone |
US20220106653A1 (en) * | 2019-03-29 | 2022-04-07 | Aisin Corporation | Quenching method |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR832391A (fr) | 1937-05-27 | 1938-09-26 | & Commerciale Des Aciers Soc I | Fils métalliques de frettage |
US3997376A (en) * | 1974-06-19 | 1976-12-14 | Midland-Ross Corporation | Spray mist cooling method |
JPS51106621A (ja) * | 1975-02-14 | 1976-09-21 | Ru Fuuru Endeyusutorieru Beruj | Kosennopatenchinguhohooyobisochi |
FR2300810A1 (fr) * | 1975-02-14 | 1976-09-10 | Four Ind Belge | Procede et dispositif de patentage de fils d'acier |
JPS5242714A (en) * | 1975-09-30 | 1977-04-02 | Baldwin Co D H | Electronic organ |
JPS5243714A (en) * | 1975-10-03 | 1977-04-06 | Kobe Steel Ltd | Method of cooling wire |
BE838796A (fr) | 1976-02-20 | 1976-06-16 | Dispositif de trempe isotherme pour le patentage de fils d'acier | |
JPS5333285A (en) * | 1976-09-09 | 1978-03-29 | Hiroshi Nozoe | Method of producing water proof materials with uneven surface |
BE851381A (fr) * | 1977-02-11 | 1977-05-31 | Centre Rech Metallurgique | Perfectionnements aux dispositifs de refroidissement des produits lamines metalliques |
US4168993A (en) * | 1978-08-10 | 1979-09-25 | Morgan Construction Company | Process and apparatus for sequentially forming and treating steel rod |
JPS6070126A (ja) * | 1983-09-27 | 1985-04-20 | Nippon Kokan Kk <Nkk> | 金属板の下面冷却装置 |
IN164702B (fr) * | 1984-10-09 | 1989-05-13 | Morgan Construction Co | |
US5121902A (en) * | 1984-10-09 | 1992-06-16 | Morgan Construction Company | Apparatus for cooling hot rolled steel rod using a plurality of air and water cooled sections |
GB8523882D0 (en) | 1985-09-27 | 1985-10-30 | Bekaert Sa Nv | Treatment of steel wires |
JP2721861B2 (ja) * | 1988-09-16 | 1998-03-04 | トーア・スチール株式会社 | 熱間圧延鋼線材の直接急冷方法 |
JPH04136126A (ja) * | 1990-09-27 | 1992-05-11 | Nippon Steel Corp | 極細鋼線の雰囲気パテンティング方法 |
JPH04280920A (ja) * | 1991-03-06 | 1992-10-06 | Sumitomo Metal Ind Ltd | 伸線用鋼線材の製造装置 |
ZA924360B (en) | 1991-07-22 | 1993-03-31 | Bekaert Sa Nv | Heat treatment of steel wire |
JPH11172401A (ja) * | 1997-12-05 | 1999-06-29 | Mitsubishi Heavy Ind Ltd | 帯材の冷却方法及び装置 |
BE1013361A3 (fr) | 2000-03-27 | 2001-12-04 | Four Industriel Belge | Procede et dispositif de chauffage de fil metallique. |
JP4678112B2 (ja) * | 2001-09-21 | 2011-04-27 | Jfeスチール株式会社 | 鋼板の冷却方法および装置 |
-
2002
- 2002-06-06 BE BE2002/0372A patent/BE1014868A3/fr not_active IP Right Cessation
-
2003
- 2003-06-05 CN CNB038130211A patent/CN100370038C/zh not_active Expired - Fee Related
- 2003-06-05 JP JP2004511559A patent/JP4851712B2/ja not_active Expired - Fee Related
- 2003-06-05 EP EP03756923A patent/EP1529122B1/fr not_active Expired - Lifetime
- 2003-06-05 WO PCT/BE2003/000102 patent/WO2003104501A2/fr active Application Filing
- 2003-06-05 US US10/516,595 patent/US7354493B2/en active Active
- 2003-06-05 AU AU2003232530A patent/AU2003232530A1/en not_active Abandoned
- 2003-06-05 AT AT03756923T patent/ATE554191T1/de active
- 2003-06-05 KR KR1020047019694A patent/KR100941675B1/ko not_active IP Right Cessation
- 2003-06-05 CA CA2488156A patent/CA2488156C/fr not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO03104501A2 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003232530A8 (en) | 2003-12-22 |
US20070107815A1 (en) | 2007-05-17 |
ATE554191T1 (de) | 2012-05-15 |
CA2488156C (fr) | 2011-03-22 |
KR100941675B1 (ko) | 2010-02-12 |
AU2003232530A1 (en) | 2003-12-22 |
JP2005529235A (ja) | 2005-09-29 |
US7354493B2 (en) | 2008-04-08 |
EP1529122B1 (fr) | 2012-04-18 |
CN1659292A (zh) | 2005-08-24 |
BE1014868A3 (fr) | 2004-05-04 |
CN100370038C (zh) | 2008-02-20 |
WO2003104501A2 (fr) | 2003-12-18 |
JP4851712B2 (ja) | 2012-01-11 |
KR20050005529A (ko) | 2005-01-13 |
CA2488156A1 (fr) | 2003-12-18 |
WO2003104501A3 (fr) | 2004-01-29 |
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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: 20050103 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
DAX | Request for extension of the european patent (deleted) | ||
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