EP0506901B1 - Vorrichtung zum inertisieren von abgiessgefässen für den transport von schmelzflüssigen metallen - Google Patents

Vorrichtung zum inertisieren von abgiessgefässen für den transport von schmelzflüssigen metallen Download PDF

Info

Publication number
EP0506901B1
EP0506901B1 EP91917467A EP91917467A EP0506901B1 EP 0506901 B1 EP0506901 B1 EP 0506901B1 EP 91917467 A EP91917467 A EP 91917467A EP 91917467 A EP91917467 A EP 91917467A EP 0506901 B1 EP0506901 B1 EP 0506901B1
Authority
EP
European Patent Office
Prior art keywords
inert gas
casting
inert
molten metal
rendering
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.)
Expired - Lifetime
Application number
EP91917467A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0506901A1 (de
Inventor
Hans De Haas
Klaus Ulrich
Klaus GRÜTZMACHER
Erhard Krause
Horstmar Mohnkern
Manfred LÖWENSTEIN
Manfred Voss
Joachim Witt
Uwe Hammer
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.)
Kloeckner Stahl GmbH
Original Assignee
Kloeckner Stahl GmbH
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 Kloeckner Stahl GmbH filed Critical Kloeckner Stahl GmbH
Publication of EP0506901A1 publication Critical patent/EP0506901A1/de
Application granted granted Critical
Publication of EP0506901B1 publication Critical patent/EP0506901B1/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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/06—Constructional features of mixers for pig-iron

Definitions

  • the invention relates to a device for inerting pouring vessels for the transport of molten metals according to the features of the preamble of claim 1.
  • a generic device of this type is known from the patent DE-PS 39 03 444, in which a device is disclosed, the inert gas via a flexible supply line in the vicinity of a pouring vessel positioned under an outlet opening of a transfer station, and a subsequent separable coupling this subsequent fixed pipe system on the outer surface of the pouring vessel and one or more inlet opening (s) in the wall of the pouring vessel presses into the interior of this pouring vessel, the inlet opening (s) being / are arranged in the wall of the pouring vessel so that they are always above of the maximum liquid level in the pouring vessel and below the upper edge of the opening of the pouring vessel.
  • Another disadvantage of the disclosed device is that the coupling and uncoupling of the flexible inert gas supply line to the fixed line system on the pouring vessel requires additional - usually manual - manipulations, the actual implementation of which, for example, when the pouring vessels are below a casting platform be positioned, the control of the supply of inert gas to the supply is usually carried out on or above the casting platform, can only be checked with additional technical effort, the omission of which, however, can lead to serious damage to the entire device and to the undesirable outflow of inert gas.
  • the present invention is therefore based on the object to further develop the known generic device for the inertization of pouring vessels for the transport of molten metals in such a way that the inclusion the pouring vessels can be dispensed with in the actual device for their inerting and the inert gas outlet opening (s) of each device can be acted upon with inert gas via one or more permanently connected supply lines, this action being able to be initiated and monitored from a single predetermined location and investment and maintenance costs can be kept as low as possible.
  • At least one inert gas blowpipe is arranged in the vicinity of each outlet opening of a transfer station in such a way that it never cuts the jet of the incoming molten metal, at least during the arrival and departure of the pouring vessel outside of whose free space profile is located and ends in front of its opening and generates an inert gas jet at its end facing the pouring vessel, which is at an angle ⁇ to the vertical, which is greater than 0 ° and less than a right angle, next to the jet of molten metal into the cavity of the pouring vessel occurs because in this way, instead of extensive, possibly repeated, reworking of a large number of pouring vessels, only a one-time installation of a suitable inert gas blowpipe arrangement is required in the vicinity of each outlet opening, due to the arrangement of each inert gas blowpipe au Outside the jet of the molten metal for the inert gas blowpipes, advantageously no expensive refractory materials are used, but only inexpensive commercially available steel pipes are used, and also no precaution
  • each inert gas blowpipe can also be provided with a permanently connected, permanently installed supply line arrangement to be regulated by means of known control elements such as valve arrangements of a known type, because such supply line arrangements are easy to monitor and maintain.
  • inert gas blowpipes of constant length because they cause particularly low investment and maintenance costs, provided that A sufficient filling of the cavity of the pouring vessel can also be ensured with the generation of the desired inert gas jet above the opening of the pouring vessel.
  • each inert gas blowpipe at least at its end facing the pouring vessel as a telescopic tube which can be extended and retracted, because this increases the investment and maintenance costs, but in certain cases it has a useful influence allows the gas flow in the pouring vessel by partially retracting the inert gas blowpipe into the opening of the pouring vessel, the control and monitoring of such a telescopic movement of the inert gas blowpipe can also be carried out without difficulty from a control station from which the end of the pouring vessel facing Inert gas blowpipe is not visible.
  • a further advantageous embodiment of the device according to the invention is characterized in that mufflers of a known type are attached to the ends of the inert gas blowpipes facing the respective pouring vessel, because such mufflers can be mounted in a simple manner on pipe ends and then the noise level in the vicinity of a transfer station for those working there.
  • the inert gas blowpipes can be used in a very particularly advantageous manner in the inspection tubes normally present in the casting platform for observing the liquid level in the respective pouring vessel - at least with an essential one Part of their length - to be installed, because this avoids the installation of additional feedthroughs in the casting platform, which further lowers the investment costs, and also, on the one hand, a permanent visual inspection of the inert gas blowpipes and, on the other hand, a cost-effective implementation of any required maintenance work on these inert gas blowpipes.
  • At least one further inert gas blowpipe protrudes into the entrance area on the casting platform side of the viewing tube, which serves to generate a dynamic pressure in the respective viewing tube that opposes the chimney effect of each viewing tube with respect to the hot gases from the respective pouring vessel, thereby achieving is that, on the one hand, the necessary protection of the employees on the casting platform against the hot gases mentioned - which was normally previously achieved by means of a back pressure built up with compressed air in the inspection pipe - continues to exist, and on the other hand, through the inspection pipes, in no case additional oxygen-containing gas mixture - such as compressed air - Get into the opening area of the respective pouring vessel and there by causing turbulence with the inert gas curtain surrounding the jet of molten metal or with the protrusion nd described, in the pouring vessel directed inert gas jet can transport oxygen to the molten metal in the pouring vessel.
  • additional oxygen-containing gas mixture - such as compressed air - Get into the opening area of the respective pouring vessel and there by causing turbul
  • Inert gases for operating the device according to the invention are advantageously, in particular, nitrogen or the exhaust gases from the complete combustion of a suitable fuel, for example natural gas or petroleum.
  • FIG. 1 An embodiment of the device according to the invention is shown in the drawing:
  • the single figure of the drawing first shows a section through the casting platform 1 of a blast furnace with a transfer station 2, which is arranged in a recess of the casting platform 1 and essentially from a two-part, largely gas-tight housing 3 seated on the casting platform 1, the upper part of which in case shown is designed as a movable cover, there is a swivel channel 4, distributor channels 5, 6 and outlet openings 7, 8 connected to transport channels on the casting platform 1 which are not recognizable in the present illustration.
  • the transfer station 2 directs a jet 9 of molten metal by means of the swivel channel 4 alternately into pouring vessels 10 and 11, for example movable pans or torpedo vessels, which are deposited with their openings 12 under the outlet openings 7, 8.
  • the inside of the transfer station 2 is to avoid the formation of metal and other oxides on the surface of the molten metal by means of a main feed line 13, a distribution station 14, a feed line 15 and outlet nozzles 16 with an inert gas, for example nitrogen or exhaust gas from the complete combustion of Natural gas or oil, acted upon, wherein the swivel channel 4 can be cooled at the same time.
  • the outlet openings 7, 8 are provided with ring-shaped nozzles 17, 18, which are acted upon by inert gas during the transfer of molten metal to a pouring vessel 10, 11 via feed lines 19, 19 'and thus a tubular inert gas curtain 20 around the jet 9, which extends from the outlet of the respective outlet opening 7, 8 at least to the opening 12 of the respective pouring vessel 10, 11.
  • the essential length section is one in each inspection tube 21, 22 embedded in the casting platform 1
  • Inert gas blowpipe 23, 24 arranged, each inert gas blowpipe 23, 24 via feed lines 25, 26 from the distribution station 14 in conjunction with controllable and regulatable valve arrangements 27, 28 of a known type, which are installed outside the respective inspection tube 21, 22 in the case shown, with inert gas.
  • each inert gas blowpipe 23, 24 facing the pouring vessel 10, 11 the inert gas emerges through a muffler 29, 30 of known type as a directed jet, which is at a finite angle ⁇ to the vertical, which is greater than 0 ° and less than a right angle is, in addition to the jet 9 of the molten metal, enters the cavity 31 of the pouring vessel 10, 11 and there displaces or keeps the atmospheric oxygen out of the cavity 31 due to the resulting gas flow, the displacement of the atmospheric oxygen already before the start of the inlet of liquid metal is introduced into the pouring vessel 10, 11.
  • a muffler 29, 30 of known type as a directed jet which is at a finite angle ⁇ to the vertical, which is greater than 0 ° and less than a right angle is, in addition to the jet 9 of the molten metal, enters the cavity 31 of the pouring vessel 10, 11 and there displaces or keeps the atmospheric oxygen out of the cavity 31 due to the resulting gas flow, the displacement of the atmospheric oxygen already before the start of
  • mufflers 29, 30 is also a protective measure in favor of those employed in the vicinity of a transfer station in connection with the use of inert gas blowpipes 23, 24 in a simple manner, as is the installation of a second - short - inert gas blowpipe 32, 33 in the entrance areas of the inspection tubes 21, 22 on the casting platform, the supply of inert gas to them also takes place from the distribution station 14 via the feed lines 25, 26, which, however, is controlled and regulated independently of the inert gas blowing tubes 23, 24 by means of separate valve arrangements 34, 35 can be.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
  • Coating With Molten Metal (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Packages (AREA)
  • Nozzles (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Details (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP91917467A 1990-10-20 1991-10-15 Vorrichtung zum inertisieren von abgiessgefässen für den transport von schmelzflüssigen metallen Expired - Lifetime EP0506901B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4033482A DE4033482C1 (cs) 1990-10-20 1990-10-20
DE4033482 1990-10-20
PCT/DE1991/000814 WO1992007099A1 (de) 1990-10-20 1991-10-15 Vorrichtung zum inertisieren von abgiessgefässen für den transport von schmelzflüssigen metallen

Publications (2)

Publication Number Publication Date
EP0506901A1 EP0506901A1 (de) 1992-10-07
EP0506901B1 true EP0506901B1 (de) 1995-02-01

Family

ID=6416769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91917467A Expired - Lifetime EP0506901B1 (de) 1990-10-20 1991-10-15 Vorrichtung zum inertisieren von abgiessgefässen für den transport von schmelzflüssigen metallen

Country Status (20)

Country Link
US (1) US5286008A (cs)
EP (1) EP0506901B1 (cs)
JP (1) JPH05502696A (cs)
KR (1) KR920703848A (cs)
CN (1) CN1060804A (cs)
AT (1) ATE118044T1 (cs)
BG (1) BG60625B1 (cs)
BR (1) BR9106189A (cs)
CA (1) CA2071825A1 (cs)
CZ (1) CZ282178B6 (cs)
DE (2) DE4033482C1 (cs)
ES (1) ES2070511T3 (cs)
FI (1) FI95672C (cs)
HU (1) HU210403B (cs)
MX (1) MX174030B (cs)
PL (1) PL168992B1 (cs)
RU (1) RU2102671C1 (cs)
SK (1) SK305991A3 (cs)
WO (1) WO1992007099A1 (cs)
ZA (1) ZA918321B (cs)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4211598C1 (cs) * 1992-04-07 1993-01-14 Oesterreichische Magnesit Ag, Radenthein, Kaernten, At
DE19532040C2 (de) * 1995-08-31 1999-05-27 Schloemann Siemag Ag Vorrichtung zum Flüssigmetall-Transport in der Gießhalle eines Schachtofens und Verfahren zum Betrieb dieser Vorrichtung
CN101934283B (zh) * 2010-09-19 2012-02-01 中冶赛迪工程技术股份有限公司 铁水露天转运抑尘装置及抑尘方法
CN102814314B (zh) * 2012-08-21 2015-08-05 唐祥国 一种煤气站废气回收处理装置
US9144822B2 (en) 2012-09-28 2015-09-29 General Electric Company Methods and systems for joining materials
EP3081658A1 (de) * 2015-04-17 2016-10-19 Oetinger Aluminium WH GmbH Transportbehälter für flüssiges metall und verfahren zum befüllen eines transportbehälters mit flüssigem metall
CN110523950A (zh) * 2019-09-06 2019-12-03 卓然(靖江)设备制造有限公司 一种离心浇注方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2632707C3 (de) * 1976-07-21 1983-04-07 Ernst Dipl.-Ing. 4006 Erkrath Beiersdorf Beschickungsanlage an Elektro-Lichtbogenöfen zur Zugabe von Legierungsmitteln und Zuschlagstoffen
FR2506190A1 (fr) * 1981-05-25 1982-11-26 Air Liquide Procede et installation de rechauffage de metal pour la coulee continue de metaux a l'aide d'un repartiteur
EP0071359A1 (en) * 1981-07-23 1983-02-09 Uss Engineers And Consultants, Inc. Methods and apparatus for molten metal fume supression
US4538670A (en) * 1984-02-06 1985-09-03 Labate M D Method and apparatus for pouring molten metal in a neutral atmosphere
JPS61206559A (ja) * 1985-03-12 1986-09-12 Daido Steel Co Ltd 溶鋼流のガスシ−ル方法
US4840297A (en) * 1988-08-05 1989-06-20 Vac Tec, Inc. Apparatus for shielding a molten metal stream
DE3903444C1 (en) * 1989-02-06 1990-02-15 Kloeckner Stahl Gmbh Method and apparatus for transporting liquid metal from a metallurgical furnace to a casting vessel
BR8907878A (pt) * 1989-02-06 1992-04-14 Kloeckner Stahl Gmbh Processo para evitar a formacao de gases de fumo em processos metalurgicos e no transporte de metal liquido de um recipiente metalurgico para recipientes de vazamento ou de fundicao e dispositivo para o transporte de metal liquido de um forno metalurgico para um recipiente de vazamento ou de fundicao
DE3904415C1 (cs) * 1989-02-14 1990-04-26 Intracon Handelsgesellschaft Fuer Industriebedarf M.B.H., 6200 Wiesbaden, De

Also Published As

Publication number Publication date
MX174030B (es) 1994-04-14
BG60625B1 (bg) 1995-10-31
DE59104499D1 (de) 1995-03-16
CN1060804A (zh) 1992-05-06
EP0506901A1 (de) 1992-10-07
ATE118044T1 (de) 1995-02-15
HUT61811A (en) 1993-03-01
US5286008A (en) 1994-02-15
FI921545A (fi) 1992-04-21
HU9202005D0 (en) 1992-09-28
BG96489A (en) 1994-03-24
JPH05502696A (ja) 1993-05-13
ZA918321B (en) 1992-10-28
BR9106189A (pt) 1993-03-16
FI95672B (fi) 1995-11-30
RU2102671C1 (ru) 1998-01-20
CA2071825A1 (en) 1992-04-21
SK305991A3 (en) 1995-07-11
DE4033482C1 (cs) 1992-02-20
FI921545A0 (fi) 1992-04-08
WO1992007099A1 (de) 1992-04-30
FI95672C (fi) 1996-03-11
CZ282178B6 (cs) 1997-05-14
PL294710A1 (en) 1992-11-16
CS305991A3 (en) 1992-05-13
KR920703848A (ko) 1992-12-18
ES2070511T3 (es) 1995-06-01
PL168992B1 (pl) 1996-05-31
HU210403B (en) 1995-04-28

Similar Documents

Publication Publication Date Title
DE69308382T2 (de) Lanze in Verbundbauweise
EP0506901B1 (de) Vorrichtung zum inertisieren von abgiessgefässen für den transport von schmelzflüssigen metallen
DE2709727B2 (de) Einrichtung zum Auswechseln von Gießrohren an Gießgefäßen beim Stranggießen
DE3009851C2 (de) Reaktorbehälter, insbesondere zur Vergasung fossiler Brennstoffe
DE3241923C2 (cs)
EP0375897A1 (de) Abstichkanal für metallurgische Gefässe
DE19817590C1 (de) Variabel einsetzbare Kombilanze
WO2015051966A1 (de) INJEKTORVORRICHTUNG ZUM AUFBLASEN ODER EINBLASEN VON SAUERSTOFFREICHEN GASEN IN EINEM METALLURGISCHEN AGGREGAT ODER SCHMELZGEFÄß UND ELEKTROLICHTBOGENOFEN
EP0181853A1 (de) Gasspülstein für metallurgische Öfen und Gefässe
DE1924812C3 (de) Brennerlanze für einen metallurgischen Ofen und Verfahren zum Betreiben eines solchen Ofens mit dieser Brennerlanze
EP3177743B1 (de) Brenner-lanzen-einheit
DE2738587A1 (de) Abschirmvorrichtung fuer einen giessstrahl aus fluessigem metall
EP2936026A1 (de) Vorrichtung und verfahren zum reinigen von verbrennungseinrichtungen
DE2621557A1 (de) Vorrichtung zum schutz eines fluessigen giesstrahles beim giessen von metall
DE2834737A1 (de) Stahlherstellungsverfahren
DE3130972A1 (de) "verfahren zum vorwaermen und aufheizen von leeren aod-konvertern"
CH657075A5 (de) Verfahren zum spuelen von metallschmelzen, mit einem durch einen spuelstein gefuehrten gas, und spuelstein zur ausfuehrung des verfahrens.
DE69011436T2 (de) Vorrichtung zum Vorheizen einer Giessdüse für geschmolzenes Metall und mit dieser Vorrichtung ausgerüstete Metallgiesseinrichtung.
DE2361344A1 (de) Verfahren und vorrichtung zum eingiessen von metall in eine stranggiesskokille
DE1284577B (de) Vorrichtung zum Entleeren von fluessiges Metall enthaltenden Stopfenpfannen
DE10359323B4 (de) Fackelbrenner mit Zusatzbrenner
DD258952A5 (de) Verfahren und vorrichtung zum eindruecken von substanzen in hochtemperatur-fluessigkeiten
DE1300638B (de) Stopfenverschluss fuer eine Giesspfanne
DE29807145U1 (de) Variabel einsetzbare Kombilanze
EP2882876B1 (de) Heisswindlanze mit einem am heisswindaustritt angeordneten düsenstein

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: 19920617

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19940603

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 ES FR GB IT LI LU NL SE

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

Ref country code: NL

Effective date: 19950201

REF Corresponds to:

Ref document number: 118044

Country of ref document: AT

Date of ref document: 19950215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59104499

Country of ref document: DE

Date of ref document: 19950316

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

Effective date: 19950321

ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2070511

Country of ref document: ES

Kind code of ref document: T3

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19951031

Ref country code: LU

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

Effective date: 19951031

Ref country code: CH

Effective date: 19951031

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

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: SE

Payment date: 19960909

Year of fee payment: 6

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

Ref country code: AT

Payment date: 19960911

Year of fee payment: 6

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

Ref country code: BE

Payment date: 19960930

Year of fee payment: 6

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

Ref country code: ES

Payment date: 19961001

Year of fee payment: 6

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

Ref country code: GB

Payment date: 19961008

Year of fee payment: 6

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

Ref country code: FR

Payment date: 19961031

Year of fee payment: 6

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

Ref country code: GB

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

Effective date: 19971015

Ref country code: AT

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

Effective date: 19971015

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

Ref country code: SE

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

Effective date: 19971016

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19971016

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

Ref country code: FR

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

Effective date: 19971031

Ref country code: BE

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

Effective date: 19971031

BERE Be: lapsed

Owner name: KLOCKNER STAHL G.M.B.H.

Effective date: 19971031

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

Effective date: 19971015

EUG Se: european patent has lapsed

Ref document number: 91917467.2

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: 20001102

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

Effective date: 20051015

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

Ref country code: DE

Payment date: 20081103

Year of fee payment: 18

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

Ref country code: DE

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

Effective date: 20100501