EP0703028A1 - Einrichtung zur Inertgasversorgung einer Düse für ein metallurgisches Gefäss - Google Patents

Einrichtung zur Inertgasversorgung einer Düse für ein metallurgisches Gefäss Download PDF

Info

Publication number
EP0703028A1
EP0703028A1 EP95402052A EP95402052A EP0703028A1 EP 0703028 A1 EP0703028 A1 EP 0703028A1 EP 95402052 A EP95402052 A EP 95402052A EP 95402052 A EP95402052 A EP 95402052A EP 0703028 A1 EP0703028 A1 EP 0703028A1
Authority
EP
European Patent Office
Prior art keywords
internal nozzle
nozzle
inert gas
internal
supply orifice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95402052A
Other languages
English (en)
French (fr)
Other versions
EP0703028B1 (de
Inventor
Patrick Tassot
Pierre Lerouge
Brunello Rosaia
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0703028A1 publication Critical patent/EP0703028A1/de
Application granted granted Critical
Publication of EP0703028B1 publication Critical patent/EP0703028B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/462—Means for handling, e.g. adjusting, changing, coupling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/58—Pouring-nozzles with gas injecting means

Definitions

  • the present invention relates to a device for supplying inert gas to an internal nozzle for metallurgical vessels for casting from below.
  • the casting of the liquid steel from a distributor in a mold is generally carried out by a device which comprises, in the direction of casting of the steel, that is to say from the distributor towards the mold, a nozzle internal bearing on a seat brick secured to the bottom of the distributor, a fixed reference plate having a tap hole, an external nozzle immersed in its lower part in the mold and having in its upper part a flat bearing in the form of a base allowing the loading and moving of the external nozzle in service.
  • the device also includes means for exchanging the external nozzle.
  • the two nozzles which are mounted coaxially define a pouring tube of the liquid steel from the distributor to the ingot mold and the inlet of this pouring tube forms the neck of the internal nozzle.
  • a stopper partially submerged in the distributor is positioned in the axis of the pouring tube above the neck of the internal nozzle.
  • This stopper has a diameter greater than the pouring tube.
  • the joint planes between the various elements constituting the pouring tube, namely the internal nozzle, the reference plate and the external nozzle constitute possible inlets for the ambient air.
  • Another complementary solution consists in injecting an inert gas, such as for example argon, into the pouring channel and at the joints between the different parts, in particular between the base of the internal nozzle which serves as a fixed reference plate. and the base of the external nozzle.
  • an inert gas such as for example argon
  • the internal nozzle of refractory material is equipped with means for diffusing the inert gas in the pouring channel and between the base of the internal nozzle and the base of the external nozzle.
  • diffusion means also serve to bring the inert gas into the interval which separates the stopper rod from the neck of the internal nozzle in order to keep this narrow interval clean.
  • diffusion means comprise supply orifices which are connected to inert gas supply pipes supported by the exchange means of the external nozzle.
  • these supply orifices open onto the external surface of the internal nozzle. at the holes provided in a metal housing covering the lower part of the internal nozzle, in particular the base.
  • metal couplers each comprising a threaded orifice.
  • the contours of the holes in the metal case are welded with the couplers to ensure their mechanical retention and gas tightness between this metal case and the refractory material of the internal nozzle.
  • the ends of the inert gas supply pipes are threaded so that they can be screwed into the couplers.
  • the internal nozzle is fixed on the exchange means by precisely adjusting the position of the base of this internal nozzle in wedging means provided in the exchange means or independent of these.
  • the metal casing covering the base of the internal nozzle makes it easier and more reliable to position this internal nozzle.
  • the inert gas supply pipes supported by the exchange means of the external nozzle are connected to each coupler of the supply orifices of the means for diffusing the inert gas.
  • connection of the inert gas supply pipes to the supply orifices requires great skill on the part of the operators and may present a risk since certain connection zones do not are not visible and may be subject to improper connections.
  • the means for diffusing the inert gas lose their effectiveness, which risks degrading the cleanliness of the liquid steel and damaging the flow regulation at the stopper rod level.
  • DE-A-4 223 944 also discloses an internal gas supply device for a nozzle provided with a supply orifice and in which a nozzle is applied in a sealed manner against this orifice by a collar Clamping.
  • the nozzle cannot be attached to the end of a connecting pipe with the neutral gas supply circuit since the nozzle must be positioned on the nozzle before the insertion of the nozzle. herself.
  • the invention aims to remedy these drawbacks by proposing a device for supplying inert gas to an internal nozzle making it possible to make an automatic connection with pipes for supplying inert gas and to reduce the risks of air infiltration. in the sprue.
  • a portion of the bottom of a metallurgical container 1 for bottom casting has been shown schematically.
  • the bottom wall 2 is covered with an internal coating 3 of refractory material.
  • the metallurgical container 1 constituted for example by a distributor, is generally arranged an ingot mold, not shown, which is intended to receive the liquid steel coming from the distributor 1.
  • the casting of the steel is carried out by a device which comprises, in particular in the direction of casting of the liquid steel, an internal nozzle 10 made of refractory material resting on a seat brick 4 secured to the bottom of the distributor 1 and a nozzle outer 11 also made of refractory material located in the axis of the inner nozzle 10.
  • the internal nozzle 10 and the external nozzle 11 constitute a pouring tube of the liquid steel from the distributor 1 towards the ingot mold and the inlet of this pouring tube forms the neck 10a of the internal nozzle 10.
  • the external nozzle 11 has at its upper part a base 11a cooperating with a reference plate secured to the internal nozzle 10.
  • the device also includes means for wedging the internal nozzle 10 and for exchanging the external nozzle 11, these means being generally designated by the reference 30 in FIG. 1.
  • the internal nozzle 10 comprises a vertical body 15 delimiting a pouring channel 16 of the liquid steel and, at its lower part, a base 17 serving as a reference plate and the external face of which is covered with a housing metallic 18.
  • This metal housing 18 facilitates and makes reliable the positioning of the internal nozzle 10 in the means 30 for wedging this internal nozzle 10 and for exchanging the external nozzle 11.
  • the internal nozzle 10 is calibrated for example by a piece 35 in the form of a fork which applies said internal nozzle 10 to bearing surfaces 36.
  • the internal nozzle 10 also comprises means for diffusing an inert gas, such as for example argon, into the pouring channel 16.
  • an inert gas such as for example argon
  • These means for diffusing the inert gas are formed for example by a cylindrical ring 19 made of porous material placed in a groove 20 formed in the vertical body 11.
  • the internal wall of the cylindrical ring 19 constitutes a length portion of the pouring channel 16 and the groove 20 is connected to a device for supplying inert gas.
  • the internal nozzle 10 may also include means for diffusing the inert gas at the joint between the base 17 of the internal nozzle 10 and the base 11a of the external nozzle 11.
  • the neck 10a of the internal nozzle 10 can also be fitted with a cylindrical ring made of porous material, not shown, for diffusing the inert gas at this neck.
  • the inert gas supply device comprises at least one supply orifice 21 located on the external face of the base 17 and connected to the diffusion means of this inert gas through at least one conduit 22 formed in the refractory material of the internal nozzle 10.
  • the duct 22 can open out at the level of the groove 20 as shown in FIG. 2 and / or at the joint between the base 17 of the internal nozzle 10 and the base 11a of the external nozzle 11.
  • the metal case 18 has a hole 23.
  • the supply orifice 21 is located on the upper external face of the base 7 of the internal nozzle 10.
  • this supply orifice 21 can also be located on the lateral external face of the base 17.
  • the supply orifice 21 is provided with a sealing washer 24 based on graphite or based on another substance which can be crushed.
  • the inert gas supply device also comprises at least one connection endpiece 25 intended to be applied to the sealing washer 24 of the supply orifice 21.
  • connection end piece 25 is slidably mounted for example in a plate 26 of the wedging means of the internal nozzle 10, these wedging means comprising the part 35.
  • wedging means may be integral with the means 30 for exchanging the external nozzle 11 or independent of these.
  • connection end piece 25 for example of circular section, has a blind hole 27 which opens out only on the lower end of this end piece 25.
  • the blind hole 27 is connected by a pipe 31 and hoses, not shown, to the fixed inert gas supply circuit to the factory.
  • connection endpiece 25 is provided at its upper part with a cap 28 of diameter greater than the diameter of the endpiece 25 to form a stop so as to prevent this endpiece from coming out of the plate 26.
  • the diameter of the hole 23 of the metal case 18 is greater than the diameter of the connection end piece 25 so as not to hinder its application to the sealing washer 24 disposed on the supply orifice 21.
  • connection end piece 25 To apply the connection end piece 25 to the sealing washer 24 with a given torque which will always be identical, this connection end piece 25 is connected to elastic compression members 29.
  • these elastic compression members are formed by at least one leaf spring 29, one end 29a of which rests on the cap 28 of the connection piece 25 and the other end 29b of which is fixed to the support plate 26 by a known fixing member.
  • the elastic compression members can also be constituted by at least one spring.
  • connection end piece 25 has a planar surface and this planar surface 25a (FIG. 3) can be provided with an annular shoulder (FIG. 4) so that the contact between the connection end piece 25 and the sealing washer 24 is performed according to a generator which reduces the risk of leakage of the inert gas.
  • connection piece 25 and the supply orifice 21 may be conical.
  • connection end piece 25 Given the significant difference between the contact surface of the lower end of the connection piece 25 and the contact surface of the supply orifice 21, very precise positioning of this connection end piece 25 is not necessary to make the junction.
  • connection end piece 25 and the supply orifice 21 The junction between the connection end piece 25 and the supply orifice 21 is produced when the internal nozzle 10 is positioned in the wedging means of this internal nozzle which are integral with the means 30 for exchanging the external nozzle 11 or independent of these means of exchange.
  • the plate 26 with the pipe 31, the endpiece 25 and the elastic compression members 29 form a connection assembly of the fixed gas supply circuit to the supply orifice 21 of the internal nozzle 10.
  • connection assembly is detached from the part 35. After having installed the internal nozzle 10, the connection assembly previously mentioned is brought into position by horizontal translation in the interval which separates the distributor 1 from the wedging means 30.
  • Lugs, not shown, located below the plate 26 and cells, not shown, on the remaining part of the part 35 make it possible, for example, to refine the positioning and correct setting of the plate 26.
  • the other end of the pipe 31 can be very easily connected to the fixed gas supply circuit by conventional means.
  • the length of the pipe 31 is determined so that access to its end opposite to the connection piece 25 poses no problem.
  • the elastic compression members 29 make it possible to apply a given torque, always strictly identical to each junction.
  • the metal case 18 may include a guide groove, not shown, from the connection end piece 25 to the supply orifice 21.
  • the internal nozzle 10 may comprise one or more supply orifices 21 and the supply device may comprise one or more connection end pieces 25.
  • the inert gas supply device enables automatic connection between the means for diffusing the inert gas from the internal nozzle with the fixed supply circuits for the inert gas from the factory.
  • the device according to the invention makes it possible to simplify the manufacture of the nozzle and of the metal case because it is no longer necessary to provide couplers and therefore significantly reduce the price and the maintenance cost of these two elements.
  • the device according to the invention is particularly advantageous when several supply orifices are provided.
  • the more there are supply orifices the easier the connection of all of these orifices with the device according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP95402052A 1994-09-23 1995-09-11 Einrichtung zur Inertgasversorgung einer Düse für ein metallurgisches Gefäss Expired - Lifetime EP0703028B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9411396 1994-09-23
FR9411396A FR2724858A1 (fr) 1994-09-23 1994-09-23 Dispositif d'alimentation en gaz inerte d'une busette interne pour recipients metallurgiques

Publications (2)

Publication Number Publication Date
EP0703028A1 true EP0703028A1 (de) 1996-03-27
EP0703028B1 EP0703028B1 (de) 1999-08-18

Family

ID=9467229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402052A Expired - Lifetime EP0703028B1 (de) 1994-09-23 1995-09-11 Einrichtung zur Inertgasversorgung einer Düse für ein metallurgisches Gefäss

Country Status (5)

Country Link
EP (1) EP0703028B1 (de)
AT (1) ATE183423T1 (de)
DE (1) DE69511494T2 (de)
ES (1) ES2136260T3 (de)
FR (1) FR2724858A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329388A1 (fr) * 1975-10-31 1977-05-27 Metacon Ag Brique refractaire avec une ouverture de passage pour un metal liquide, et son procede de fabrication
US4502670A (en) * 1984-02-02 1985-03-05 Allied Corporation Gas hook-up to a ladle
GB2211121A (en) * 1987-10-21 1989-06-28 Didier Werke Ag Bodies of refractory material
DE4223944A1 (de) * 1992-07-21 1994-01-27 Didier Werke Ag Anschlußeinrichtung für eine Gaszuleitung eines Formkörpers aus Feuerfestmaterial

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2329388A1 (fr) * 1975-10-31 1977-05-27 Metacon Ag Brique refractaire avec une ouverture de passage pour un metal liquide, et son procede de fabrication
US4502670A (en) * 1984-02-02 1985-03-05 Allied Corporation Gas hook-up to a ladle
GB2211121A (en) * 1987-10-21 1989-06-28 Didier Werke Ag Bodies of refractory material
DE4223944A1 (de) * 1992-07-21 1994-01-27 Didier Werke Ag Anschlußeinrichtung für eine Gaszuleitung eines Formkörpers aus Feuerfestmaterial

Also Published As

Publication number Publication date
DE69511494T2 (de) 2000-03-23
DE69511494D1 (de) 1999-09-23
FR2724858A1 (fr) 1996-03-29
ATE183423T1 (de) 1999-09-15
EP0703028B1 (de) 1999-08-18
FR2724858B1 (de) 1997-02-07
ES2136260T3 (es) 1999-11-16

Similar Documents

Publication Publication Date Title
FR3081964A1 (fr) Scellage de structures creuses
FR2688927A1 (fr) Dispositif de securite contre une defaillance d'une surpression d'un caisson sous pression d'un reacteur nucleaire.
CA2394661A1 (fr) Dispositif de transfert de materiaux pulverulents, et application a l'alimentation d'un metal en fusion en materiau pulverulent
EP0703028B1 (de) Einrichtung zur Inertgasversorgung einer Düse für ein metallurgisches Gefäss
FR3146502A1 (fr) Réservoir pour un fluide sous pression et procédé de fabrication associé
EP0428433B1 (de) Vorrichtung zum Fixieren der Steuerstabsführungsplatte im Kernreaktordruckgefäss
EP1069355A2 (de) Sicherheitsventil für Druckbehälter
FR2800309A1 (fr) Procede et dispositif de soutirage d'un materiau fondu contenu dans un creuset
EP0912275B1 (de) Vorrichtung zum spannen einer giesstisches einer vertikal- stranggiessmaschine für das giessen von roheisenwerkstücken, insbesonderen rohren
BE1004282A6 (fr) Dispositif de prechauffage d'une busette de coulee d'un metal en fusion et installation de coulee d'un metal equipee de ce dispositif.
EP1007247B1 (de) Verfahren und vorrichtung zum stranggiessen von metallen mit kokillen-aufsatz
EP0484720B1 (de) Vorrichtung zum Einblasen von vorerhitzter Luft in einem Schachtofen und Verfahren zum Herstellen konvexer Teile von Kugelgelenken für Düsenstöcke
FR2692665A1 (fr) Dispositif d'étanchéité partielle des électrodes de fours électriques à arc.
EP0314577A2 (de) Druckentlastungsventil für eine Rohrleitung für ein heisses Fluid
EP0091703B1 (de) Mischventil mit Steuerscheibeneinsatz aus hartem Material
EP1133372B1 (de) Kippbarer behälter zur behandlung von metallschmelze und dichtverbindung mit einer feststehenden rinne
EP0582496B1 (de) Innerer Ausguss aus feuerfestem Material zur Verwendung in metallurgischen Gefässen
EP1029558A1 (de) Brandschutzventil
FR2570469A1 (fr) Dispositif pour le remplissage des bouteilles de gaz butane et propane
EP0069867A1 (de) Vorrichtung zum Unterstützen und Zentrieren eines Kernes in einer Kokille beim Stranggiessen von Röhren
EP0873486B1 (de) Rohrförmiges verbindungselement
FR2844572A1 (fr) Dispositif de securite a disque de rupture servant a pallier les surpressions de fluide
EP0695904A1 (de) Abzweiganschlussvorrichtung zur Verteilung gasförmiger Fluide
FR2489724A1 (fr) Dispositif pour la manipulation de tubes livrant passage a un corps fondu a haute temperature
FR2573509A1 (fr) Dispositif d'intervention pour la mise hors gaz de canalisations de gaz et procede d'utilisation d'un tel procede

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: 19951128

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19980305

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990818

Ref country code: GR

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

Effective date: 19990818

REF Corresponds to:

Ref document number: 183423

Country of ref document: AT

Date of ref document: 19990915

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69511494

Country of ref document: DE

Date of ref document: 19990923

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: FRENCH

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2136260

Country of ref document: ES

Kind code of ref document: T3

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19991118

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19991118

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

Effective date: 19991122

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: NL

Payment date: 20020815

Year of fee payment: 8

Ref country code: CH

Payment date: 20020815

Year of fee payment: 8

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

Ref country code: AT

Payment date: 20020820

Year of fee payment: 8

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

Ref country code: GB

Payment date: 20020903

Year of fee payment: 8

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

Ref country code: LU

Payment date: 20020911

Year of fee payment: 8

Ref country code: DE

Payment date: 20020911

Year of fee payment: 8

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

Ref country code: FR

Payment date: 20020917

Year of fee payment: 8

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

Ref country code: ES

Payment date: 20020919

Year of fee payment: 8

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

Ref country code: BE

Payment date: 20021011

Year of fee payment: 8

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

Ref country code: LU

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

Effective date: 20030911

Ref country code: GB

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

Effective date: 20030911

Ref country code: AT

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

Effective date: 20030911

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

Ref country code: ES

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

Effective date: 20030912

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

Ref country code: LI

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

Effective date: 20030930

Ref country code: CH

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

Effective date: 20030930

Ref country code: BE

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

Effective date: 20030930

BERE Be: lapsed

Owner name: S.A. *SOLLAC

Effective date: 20030930

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

Ref country code: NL

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

Effective date: 20040401

Ref country code: DE

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

Effective date: 20040401

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

Effective date: 20030911

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: FR

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

Effective date: 20040528

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20040401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030912

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050911