EP0329645A1 - Brique de brassage au gaz - Google Patents

Brique de brassage au gaz Download PDF

Info

Publication number
EP0329645A1
EP0329645A1 EP89890042A EP89890042A EP0329645A1 EP 0329645 A1 EP0329645 A1 EP 0329645A1 EP 89890042 A EP89890042 A EP 89890042A EP 89890042 A EP89890042 A EP 89890042A EP 0329645 A1 EP0329645 A1 EP 0329645A1
Authority
EP
European Patent Office
Prior art keywords
flow channels
gas
purging plug
channels
refractory
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
EP89890042A
Other languages
German (de)
English (en)
Other versions
EP0329645B1 (fr
Inventor
Rudolf Handler
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.)
Veitscher Magnesitwerke AG
Original Assignee
Veitscher Magnesitwerke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3489722&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0329645(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Veitscher Magnesitwerke AG filed Critical Veitscher Magnesitwerke AG
Publication of EP0329645A1 publication Critical patent/EP0329645A1/fr
Application granted granted Critical
Publication of EP0329645B1 publication Critical patent/EP0329645B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Definitions

  • the invention relates to a gas purging plug for metallurgical vessels, comprising a refractory molded body with continuous flow channels.
  • the gas purging stones can either contain a refractory stone body of high porosity, in which case the gas passage takes place through the open pores between the refractory grains, or they contain a little or non-porous refractory stone body in which slots or channels are formed through which the gas passage takes place . In the latter case, one speaks of gas purging stones with directed porosity.
  • refractory moldings which are provided with narrow channels for blowing gas into a molten metal bath can be produced in that cores or mandrels which are intended to form the channels are arranged in a mold for the molding and secured in place. A pourable refractory mass is then introduced into the mold and compacted. The molding obtained is stripped off and dried.
  • the cores or mandrels intended for the formation of the channels can be metal tubes which remain in the finished shaped body or wires which are pulled out of the shaped body, which is facilitated if the wires are provided with a coating.
  • the cores or mandrels can also be made of a meltable or evaporable material, e.g. made of plastic, which melts or evaporates during the drying process.
  • the production of shaped bodies with curved channels was also considered, but without information about the purpose of such a measure or the type of curvature.
  • the gas In operation, the gas must only be blown through the sink during certain times, for example during freshening. In the meantime, for example during sampling or during parting or loading, the gas supply could be switched off. If you do this however, it has the consequence that molten metal penetrates into the gas channels or into the stone pores, solidifies there and clogs the channels or pores. When gas blowing resumes, the metal melt which has penetrated is only partially melted and blown out again. In order to prevent the penetration of molten metal, a gas, for example an inert gas, is usually blown through the sink in the meantime. However, this requires a constant gas supply to the furnace or vessel, which is why this measure can only be used with stationary ovens or vessels.
  • the flushing performance decreases over time due to the deposition of solidified and not remelted metal.
  • the rinsing efficiency is approximately between 40% and 85% for pan sinks with directed porosity and between approximately 60% and 95% of the theoretical rinsing capacity for porous pan sinks.
  • the sink blocks cannot be in use during their full theoretical lifespan, but must be replaced after a fraction of this time, which corresponds to the percentages mentioned.
  • the object of the invention is to design the gas purging plug so that the melting and blowing out of the metal infiltration is possible to a large extent after each blow interruption.
  • this is achieved in a sink with continuous flow channels in that the flow channels, at least in the area adjacent to their outlet openings, are arranged at a high inclination with respect to the direction of the longitudinal axis of the sink.
  • the flow channels can have an angle of inclination between 15 ° and 60 °, preferably between 20 ° and 50 °, with respect to that end face of the sink which contains the outlet openings of the flow channels.
  • the penetrating metal melt drops travel the same length in the conventional flow channels and in the inclined channels designed according to the invention, that is Penetration depth, measured in the direction of the longitudinal axis of the sink, is less in the channels designed according to the invention than in the conventional channels. Since the melting of the infiltrated metal drops due to the temperature gradient in the direction of the longitudinal axis of the sink is only possible in the vicinity of the hot-sided sink surface, the chances of melting and rinsing out after the blow interruption are greater in the gas channels designed according to the invention than in the conventional channels.
  • the sink stones are subject to wear during the course of operation, the sink area that was originally located inside the stone becomes the hot-sided sink surface after some operating time.
  • the sink block according to the invention can also be designed in such a way that the inclined, in particular helical, wave or zigzag-shaped design of the flow channels about two thirds of the stone height is sufficient, as seen from the face of the stone containing the outlet openings.
  • the exiting gas jet is given a swirl, as a result of which the above-mentioned kickback effect is reduced and wear is reduced.
  • the formation of this swirl can be further favored in that the flow channels have the same inclined position in each stone cross-section in a rotationally symmetrical arrangement.
  • the flushing stones according to the invention can be produced in a manner known per se and described at the outset by embedding channel-forming cores in a stone body made of refractory casting compound.
  • cores for example, burnable, meltable or evaporable materials, such as plastics, come with a covering, e.g. made of plastic, provided wires or thin metal tubes, e.g. made of copper or steel.
  • These cores are dimensioned so that the resulting flow channels have a clear width in the order of 1 mm or less.
  • Suitable casting compounds are primarily those based on high alumina or alumina or so-called "low cement castables", ie casting compounds which contain about 5% by weight of cement.
  • the basic materials of these casting compounds are primarily sintered alumina, corundum, mullite, mullite clinker with 50 to 72% by weight of Al2O3, bauxite, sintered bauxite or andalusite.
  • Chromium oxide CR2O3, zirconium (zirconium silicate), zirconium oxide, clay and calcined clay are suitable as additives to these materials.
  • the casting compounds can be hydraulically bound, e.g. with alumina cement, or chemically bound, e.g. with a phosphate binder. Casting compositions based on magnesia, for example as described in AT-B-248 936, can also be used.
  • FIG. 1 to 3 three exemplary embodiments of the gas purging plug according to the invention are shown in a schematic, diagrammatic illustration, partially cut away.
  • Fig. 4 shows a detail of the sink of Fig. 2 in longitudinal section.
  • a refractory molded body 1 made of refractory casting compound, a sheet metal jacket 2 and a bottom sheet 3 welded to the latter, to which a gas supply pipe 4 is attached in the center.
  • This tube 4 opens into a gas distribution chamber which is filled with a gas-permeable plate 5 made of porous refractory material.
  • a gas-permeable plate 5 made of porous refractory material.
  • a porous refractory material can be used, which has been produced according to the method of AT-B-374 164.
  • the gas purging plug sits in a perforated brick 6, of which only a quarter is shown for reasons of clarity.
  • Flow channels 7 are arranged in the refractory molded body 1, which in the exemplary embodiment shown in FIG. 1 are of helical design.
  • the gas purging plug shown has 17 such flow channels 7, which are arranged evenly distributed over the circular cross section. For the sake of clarity, only one such flow channel 7 is shown in the drawing and some others are indicated.
  • the flow channels run from the gas distribution chamber filled with the gas-permeable plate 5 on the cold side of the sink to its hot-side end face 8, in which the outlet openings of the flow channels 7 are located.
  • the sink it can be carried out in an advantageous manner that first the sheet metal jacket 2, the bottom plate 3 and the gas supply pipe 4 are welded to one another and the gas-permeable plate 5 and the cores for forming the flow channels 7 are inserted into the resulting cavity and inserted into them Secures location. Then a refractory casting compound is introduced, compacted and then dried by heating. If the cores consist of a heat-consumable (burn-out, meltable or evaporable) material, such as plastic, or of wires covered with such a material, the flow channels 7 are formed during drying. In the case of the wires, they can remain in the sink and the gas passage takes place due to the space being freed up due to the disappearance of the sheath.
  • a heat-consumable (burn-out, meltable or evaporable) material such as plastic
  • wires covered with such a material the flow channels 7 are formed during drying. In the case of the wires, they can remain in the sink and the gas passage takes place due to the space being
  • 2 corresponds to that of FIG. 1 with the difference that the flow channels 7 'are zigzag or wave-shaped and that the gas distribution chamber 9 is designed as a cavity. 2 can be produced in the same way as described in FIG. 1, but instead of the gas-permeable plate 5 a correspondingly shaped body made of an edible material, e.g. Styrofoam is introduced, which disappears when heated while the casting compound dries and releases the gas distribution chamber.
  • an edible material e.g. Styrofoam
  • the flow channels 7 ' have an angle of inclination ⁇ with respect to the end face 8, which contains the outlet openings of the flow channels.
  • a conventional vertical flow channel is shown in dashed lines in the right half of FIG. 4 for comparison. If one assumes that when the gas blowing is interrupted, the metal melt penetrates a distance x into the channel and solidifies there, it can be seen that the depth of penetration, measured as a vertical distance from the end face (8), in the inventive flow channel 7 'only x ⁇ Sin ⁇ and is therefore less than the penetration depth x in the conventional vertical flow channel. If the end face 8 is subjected to heat again and the gas blowing is resumed, the penetrated metal can be used in the invention Flow channel can be melted and blown out more easily than with the conventional flow channel.
  • the frustoconical gas distribution chamber extends over about a third of the stone height, for example 80 to 100 mm, and is filled with a gas-permeable body 5 'made of porous refractory material. This creates an optical residual strength indicator for the point in time when the sink needs to be replaced. As soon as the sink is worn down to the gas-permeable body 5 ', the body 5' is visible on the hot side.
  • the flow channels 7 are arranged helically around support bodies 10, which are embedded in the refractory molded body 1.
  • This support body 10 are appropriately frustoconical and, like the gas distribution body 5 ', consist of a porous refractory material produced by the method of AT-B-374 164. If the support bodies 10 are gas-permeable, they offer additional options for the gas passage.
  • the helical or spiral flow channels 7 extend over the entire height of the support body (10); in the drawing, however, they are only indicated in the upper area because of the simpler representation.
  • the gas distribution chamber 9 can be sealed against the refractory molded body 1 by a metal housing and the metal tubes welded gas-tight to the metal housing, thereby preventing the refractory molded body 1 from being exposed to the purge gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
  • Materials For Medical Uses (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Treating Waste Gases (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Incineration Of Waste (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Optical Couplings Of Light Guides (AREA)
EP89890042A 1988-02-19 1989-02-17 Brique de brassage au gaz Expired - Lifetime EP0329645B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT404/88 1988-02-19
AT40488 1988-02-19

Publications (2)

Publication Number Publication Date
EP0329645A1 true EP0329645A1 (fr) 1989-08-23
EP0329645B1 EP0329645B1 (fr) 1991-04-24

Family

ID=3489722

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89902368A Pending EP0356483A1 (fr) 1988-02-19 1989-02-17 Bloc permeable aux gaz pour operations metallurgiques
EP89890042A Expired - Lifetime EP0329645B1 (fr) 1988-02-19 1989-02-17 Brique de brassage au gaz

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89902368A Pending EP0356483A1 (fr) 1988-02-19 1989-02-17 Bloc permeable aux gaz pour operations metallurgiques

Country Status (10)

Country Link
EP (2) EP0356483A1 (fr)
KR (1) KR900700638A (fr)
AT (1) ATE62937T1 (fr)
AU (1) AU610697B2 (fr)
DE (1) DE58900091D1 (fr)
ES (1) ES2021894B3 (fr)
HU (1) HU891288D0 (fr)
IN (1) IN170797B (fr)
WO (1) WO1989007659A1 (fr)
ZA (1) ZA891290B (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992015413A1 (fr) * 1991-03-04 1992-09-17 Mefos Stiftelsen För Metallurgisk Forskning Procede et agencement permettant de purger, a l'aide d'un gaz, un bain de metal en fusion contenu dans un recipient
WO1992016664A1 (fr) * 1991-03-23 1992-10-01 Martin & Pagenstecher Gmbh Dispositif d'insufflation pour un recipient metallurgique
WO1995033587A1 (fr) * 1994-06-08 1995-12-14 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Dispositif de rincage par les gaz pour cuve metallurgique, notamment un convertisseur d'acierie
FR2739312A1 (fr) * 1995-09-28 1997-04-04 Lorraine Laminage Element poreux destine a l'affinage d'un metal liquide dans un recipient metallurgique
WO1997043062A1 (fr) * 1996-05-11 1997-11-20 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Dispositif de rinçage par gaz
EP0855237A1 (fr) * 1997-01-23 1998-07-29 Savoie Refractaires Dispositif perfectionné d'insufflation d'un gaz dans un métal en fusion
EP0916431A1 (fr) * 1997-11-12 1999-05-19 Wilhelm Gerhard Venn Brique pour lavage au gaz avec un passage hélicoidal
EP1077266A2 (fr) * 1999-08-19 2001-02-21 Tokyo Yogyo Kabushiki Kaisha Brique de brassage au gaz et procédé de fabrication
EP1736260A1 (fr) * 2005-06-21 2006-12-27 Refractory Intellectual Property GmbH & Co. KG Quenouille
DE102006031687A1 (de) * 2006-07-08 2008-01-17 Refractory Intellectual Property Gmbh & Co. Kg Element
CN101203342B (zh) * 2005-06-21 2010-11-24 雷弗拉克托里知识产权两合公司 用于冶金坩埚的塞子
WO2022075961A1 (fr) * 2020-10-05 2022-04-14 Limited Liability Company "Innotech-Splav" Procédé de traitement d'un métal liquide à l'aide d'un milieu gazeux dans un récipient métallurgique et dispositif pour sa mise en œuvre

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4419811C1 (de) * 1994-06-07 1995-04-27 Plibrico Gmbh Gasspülstein mit Verschleißanzeige
DE19701806C2 (de) * 1997-01-21 1998-11-19 Didier Werke Ag Verwendung eines Drahtgeflechtes
RS53601B1 (en) * 2012-09-20 2015-02-27 Refractory Intellectual Property Gmbh & Co. Kg FIRE-RESISTANT CERAMIC GAS CLEANER AND PROCEDURE FOR MAKING THE SAID GAS CLEANER

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1200544B (de) * 1964-02-06 1965-09-09 Hufnagl Walter Duese aus Kapillaren
EP0080403A1 (fr) * 1981-11-23 1983-06-01 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Dispositif pour l'introduction de gaz dans un bain de métal liquide
AT376701B (de) * 1979-04-25 1984-12-27 Siderurgie Fse Inst Rech Gasdurchlaessiger baukoerper aus feuerfestem material und verfahren zu seiner herstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1200544B (de) * 1964-02-06 1965-09-09 Hufnagl Walter Duese aus Kapillaren
AT376701B (de) * 1979-04-25 1984-12-27 Siderurgie Fse Inst Rech Gasdurchlaessiger baukoerper aus feuerfestem material und verfahren zu seiner herstellung
EP0080403A1 (fr) * 1981-11-23 1983-06-01 UNION SIDERURGIQUE DU NORD ET DE L'EST DE LA FRANCE par abréviation "USINOR" Dispositif pour l'introduction de gaz dans un bain de métal liquide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RADEX RUNDSCHAU, Nr. 3, 1983, Seiten 179-208; B. GRABNER et al: "Einsatz und Verschleiss von Spülsteinen in der Sekundärmetallurgie" *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992015413A1 (fr) * 1991-03-04 1992-09-17 Mefos Stiftelsen För Metallurgisk Forskning Procede et agencement permettant de purger, a l'aide d'un gaz, un bain de metal en fusion contenu dans un recipient
WO1992016664A1 (fr) * 1991-03-23 1992-10-01 Martin & Pagenstecher Gmbh Dispositif d'insufflation pour un recipient metallurgique
WO1995033587A1 (fr) * 1994-06-08 1995-12-14 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Dispositif de rincage par les gaz pour cuve metallurgique, notamment un convertisseur d'acierie
FR2739312A1 (fr) * 1995-09-28 1997-04-04 Lorraine Laminage Element poreux destine a l'affinage d'un metal liquide dans un recipient metallurgique
WO1997043062A1 (fr) * 1996-05-11 1997-11-20 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Dispositif de rinçage par gaz
EP0855237A1 (fr) * 1997-01-23 1998-07-29 Savoie Refractaires Dispositif perfectionné d'insufflation d'un gaz dans un métal en fusion
EP0916431A1 (fr) * 1997-11-12 1999-05-19 Wilhelm Gerhard Venn Brique pour lavage au gaz avec un passage hélicoidal
EP1077266A2 (fr) * 1999-08-19 2001-02-21 Tokyo Yogyo Kabushiki Kaisha Brique de brassage au gaz et procédé de fabrication
EP1077266A3 (fr) * 1999-08-19 2002-11-13 Tokyo Yogyo Kabushiki Kaisha Brique de brassage au gaz et procédé de fabrication
US6551550B1 (en) 1999-08-19 2003-04-22 Tokyo Yogyo Kabushiki Kaisha Gas blowing plug and manufacturing method therefor
EP1736260A1 (fr) * 2005-06-21 2006-12-27 Refractory Intellectual Property GmbH & Co. KG Quenouille
CN101203342B (zh) * 2005-06-21 2010-11-24 雷弗拉克托里知识产权两合公司 用于冶金坩埚的塞子
DE102006031687A1 (de) * 2006-07-08 2008-01-17 Refractory Intellectual Property Gmbh & Co. Kg Element
DE102006031687B4 (de) * 2006-07-08 2008-08-14 Refractory Intellectual Property Gmbh & Co. Kg Element
WO2022075961A1 (fr) * 2020-10-05 2022-04-14 Limited Liability Company "Innotech-Splav" Procédé de traitement d'un métal liquide à l'aide d'un milieu gazeux dans un récipient métallurgique et dispositif pour sa mise en œuvre

Also Published As

Publication number Publication date
WO1989007659A1 (fr) 1989-08-24
AU3061989A (en) 1989-09-06
IN170797B (fr) 1992-05-23
HU891288D0 (en) 1990-03-28
DE58900091D1 (de) 1991-05-29
AU610697B2 (en) 1991-05-23
KR900700638A (ko) 1990-08-16
ATE62937T1 (de) 1991-05-15
ES2021894B3 (es) 1991-11-16
EP0356483A1 (fr) 1990-03-07
ZA891290B (en) 1991-10-30
EP0329645B1 (fr) 1991-04-24

Similar Documents

Publication Publication Date Title
EP0329645B1 (fr) Brique de brassage au gaz
DE2702435C2 (de) Auswechselbare Verschleißplatte für Schieberverschlüsse und Verfahren zu deren Herstellung
DE69210664T2 (de) Verfahren und Form zur Herstellung, Ausbesserung und Wiederherstellung von Behältern für geschmolzenes Metall
DE2259553B2 (de) Zwischenbehälter für Stranggießanlagen
DE4031403A1 (de) Keramisches schweissverfahren und lanze zur verwendung in einem solchen verfahren
DE2646707B2 (de) Tauchausguß aus feuerfestem Werkstoff für das Stranggießen von Stahl
KR890002116B1 (ko) 용융금속 배출 장치
EP0105868B1 (fr) Four métallurgique ou récipient métallurgique
EP0181853B1 (fr) Brique pour lavage au gaz pour fours et récipients métallurgiques
DE3241923C2 (fr)
DE2715707C2 (de) Vorrichtung zur Wärmeableitung unter dem Schmelzenauftreffbereich in einem Zwischengefäß
DE2729188A1 (de) Hochtemperatur-reaktor und verfahren zu seinem betrieb
DE3614730C2 (fr)
DE3433123C2 (de) Blasstein für metallurgische Pfannen und Verfahren zu seinem Einfügen in die Zustellung
EP0432628B1 (fr) Procédé pour augmenter la solidité d'un revêtement réfractaire d'enceinte
DE69008760T2 (de) Lichtbogenofen und Verfahren zum Schmelzen von Schrott.
AT391483B (de) Behaelter zur behandlung von hochschmelzenden stoffen, feuerfester stein fuer die zustellung und verfahren zum betrieb eines solchen behaelters
DE1508571B1 (de) Feuerfeste Auskleidung fuer Induktionsoefen
DE3842691C2 (fr)
EP1820586A1 (fr) Buse réfractaire et récipient métallurgique qui en est équipé
DE2219096A1 (de) Gießrinne
DE4207881C1 (en) Gas flushing brick for melting vessels - has gas channels slightly inclined to vertical to ensure that gas flow is towards centre of vessel despite non-vertical fitting of brick inside vessel bottom
EP1797976A2 (fr) Pierre de lavage à gaz
DE4419811C1 (de) Gasspülstein mit Verschleißanzeige
EP3827912B1 (fr) Buse échangeable pour un système de changeur de buse, procédé de fabrication d'une telle buse, système de changeur de buse comprenant une telle buse et panier de coulée comprenant un tel système de changeur de buse

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): ES GR

17P Request for examination filed

Effective date: 19891018

XX Miscellaneous (additional remarks)

Free format text: VERBUNDEN MIT 89902368.3/0356483 (EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) DURCH ENTSCHEIDUNG VOM 19.04.90.

17Q First examination report despatched

Effective date: 19900515

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 GR 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: 19910424

Ref country code: GR

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: 19910424

REF Corresponds to:

Ref document number: 62937

Country of ref document: AT

Date of ref document: 19910515

Kind code of ref document: T

XX Miscellaneous (additional remarks)

Free format text: VERBUNDEN MIT 89902368.3/0356483 (EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) DURCH ENTSCHEIDUNG VOM 19.04.90.

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 58900091

Country of ref document: DE

Date of ref document: 19910529

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

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

Ref country code: SE

Payment date: 19920204

Year of fee payment: 4

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

Ref country code: FR

Payment date: 19920211

Year of fee payment: 4

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

Ref country code: LU

Payment date: 19920212

Year of fee payment: 4

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

Ref country code: ES

Payment date: 19920219

Year of fee payment: 4

Ref country code: BE

Payment date: 19920219

Year of fee payment: 4

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

Ref country code: DE

Payment date: 19920224

Year of fee payment: 4

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

Ref country code: AT

Payment date: 19920227

Year of fee payment: 4

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

Ref country code: LI

Effective date: 19920229

Ref country code: CH

Effective date: 19920229

26 Opposition filed

Opponent name: DIDIER-WERKE AG

Effective date: 19920124

EPTA Lu: last paid annual fee
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: LU

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

Effective date: 19930217

Ref country code: GB

Effective date: 19930217

Ref country code: AT

Effective date: 19930217

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

Ref country code: SE

Effective date: 19930218

Ref country code: ES

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

Effective date: 19930218

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

Ref country code: BE

Effective date: 19930228

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

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

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19930204

BERE Be: lapsed

Owner name: VEITSCHER MAGNESITWERKE A.G.

Effective date: 19930228

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

Effective date: 19930217

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

Ref country code: FR

Effective date: 19931029

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

Ref country code: DE

Effective date: 19931103

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 89890042.8

Effective date: 19930912

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990301

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: 20050217