EP0402344A1 - Procédé pour la conduite de la scorie dans un convertisseur pour la fabrication d'acier - Google Patents
Procédé pour la conduite de la scorie dans un convertisseur pour la fabrication d'acier Download PDFInfo
- Publication number
- EP0402344A1 EP0402344A1 EP90890142A EP90890142A EP0402344A1 EP 0402344 A1 EP0402344 A1 EP 0402344A1 EP 90890142 A EP90890142 A EP 90890142A EP 90890142 A EP90890142 A EP 90890142A EP 0402344 A1 EP0402344 A1 EP 0402344A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slag
- ejection
- probability
- sound level
- blowing
- 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
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
- C21C5/36—Processes yielding slags of special composition
-
- 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
- C21C5/30—Regulating or controlling the blowing
-
- 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
- C21C5/4673—Measuring and sampling devices
Definitions
- the invention relates to a method for guiding slag in a blow steel converter with at least one blowing lance, the distance of which from the bath surface, which is controlled according to a desired course of the refining process, is corrected as a function of the sound level of the blowing noise measured at selected frequencies by the slag, if necessary by adapting the amount of oxygen supplied becomes.
- the distance between the lances and the surface of the bath is reduced after the start of the blowing process as the slag level increases. Since the slag that forms dampens the blowing noise, it can pass through the slag Measured sound level of the blowing noise for slag guidance are evaluated, especially since the sound level of the blowing noise damped by the slag, which is measured in particular at certain frequencies, also depends on the composition of the slag. The sound level of the blowing noise damped by the slag, measured at certain frequencies, can therefore be used to control the lance distance from the bath surface in order to set a thin, reactive slag adapted to the respective blowing course. However, since the condition of the slag depends on many influencing factors and is subject to constant changes, this lance control is not sufficient to prevent the discharge of slag only depending on the sound level of the blowing noise damped by the slag.
- the invention is therefore based on the object of improving a method for slag guidance in a blast steel converter of the type described at the outset in such a way that not only an advantageous, reactive slag is ensured but also the greater ejection probability that otherwise occurs with such a slag guidance can be suppressed .
- the invention achieves the stated object in that the actual values of the sound level measured at the individual frequencies are combined to form a resulting characteristic variable, that the difference between this resulting characteristic variable and a predetermined comparison variable which determines a probable ejection on the basis of the sound level which can be assigned to it and, if necessary, after a link with other parameters influencing the probability of slag ejection according to probability rules as a measure of an ejection probability is compared with at least one predetermined probability limit, a cor rectification of the blowing lance spacing or the amount of oxygen supplied, and that when a slag ejection is determined, the predetermined comparison variable is corrected on the basis of the characteristic variable obtained from the actual values of the sound level.
- the invention is based on the knowledge that the parameters determined in each case from a plurality of slag ejections from the sound levels accumulate in a certain range, so that a center or a center of gravity can be specified in this parameter field, which due to the sound amplitudes that can be assigned to it determines a probable ejection at individual frequencies. Therefore, if the sound amplitudes determined at any time during the blowing process for the selected frequencies are combined to form a corresponding parameter and compared with a comparison parameter corresponding to the focus of the parameter field, then an ejection probability can be based on the difference between the comparison parameter associated with an expected ejection and the determined parameter be specified at the time of measurement.
- the lance distance from the bath surface or the amount of oxygen supplied by the blowing lance can thus be reduced in order to reduce the ejection probability accordingly.
- the comparison variable can be affected by a corresponding shift in the center of gravity or center of the slag ejection that determines the comparison variable based on the actual values of the sound level measured during this ejection Parameter field are corrected.
- the linking of the sound amplitudes determined at the selected frequencies to a characteristic can advantageously be done by combining the individual sound amplitudes in a vector space with spatial axes assigned to a frequency to form a characteristic vector, the size of the difference vector between this characteristic vector and the vector associated with the comparison variable is determined as a measure of the probability of a slag ejection depending on the sound level.
- the ejection probability depends not only on the sound level determined at certain frequencies, but also on other influencing factors, e.g. B.
- the measure of the ejection probability based on the sound level can be linked according to rules of probability calculation with ejection probabilities dependent on other parameters to a resulting probability, which naturally improves the accuracy of the possible slag guidance.
- the in a blowing steel converter 1 engaging blowing lance 2 is held in a vertically adjustable carriage 3, the actuator of which is denoted by 4.
- the blowing lance 2 which is connected via a supply line 5 to an oxygen source (not shown), passes through an exhaust hood 6 assigned to the blowing steel converter 1, from which a sound guide tube 7 leads to a sound pickup 8, which provides protection against inadmissible thermal stress and excessive contamination Nitrogen can be purged, which is supplied via the nitrogen line 9.
- the output signal of the microphone 10 of the sound pickup 8 is divided by individual frequency filters 11, 12, 13 and 14 into signals assigned to selected frequency ranges, the sound levels of which are determined in an evaluation circuit 15 by averaging a plurality of sound amplitudes measured in succession and linked to one another to form a resulting parameter, and by the vectorial combination of the individual sound levels assigned to a frequency or a frequency range to form a sum vector in an orthogonal vector space, each with a spatial axis for the individual frequencies or frequency ranges.
- a difference vector to a comparison vector that can be read in via an input 16 is determined in the evaluation circuit 15, which is assigned to those sound levels related to the individual frequencies at which a slag ejection must be expected due to an assumed or experimentally determined frequency distribution of slag discharges.
- the length of this difference vector can thus be evaluated as a measure of the ejection probability to be expected at a measured sound level, because the ejection probability increases with a decreasing distance between the end points of the comparison and the sum vector.
- the respective value of the ejection probability results from the determined or assumed frequency distribution of the ejections depending on the size of the difference vector.
- the actual values of the sound level measured for the individual frequencies in each case with a plurality of ejections can be combined to sum vectors, the center of gravity in this center being determined from the end points of these sum vectors clustering around a center, which then determines the comparison variable or determines the comparison vector.
- the carriage 3 for storing the blowing lance 2 is assigned a displacement sensor 18 and the supply line 5 a sensor 19 for the flow rate of oxygen, so that via computer stages 20, 21, which are assigned to these sensors 18 and 19, the respective measured values
- the associated probability values can be determined on the basis of the frequency distribution of the ejections stored in the computer stages 20 and 21 and related to the respective measured values, in order to arrive at a resulting probability according to the rules of probability calculation by linking the only one parameter taking into account each parameter the linkage stage 22 using the Bayesian rule for the dependence of the ejection probability on the lance distance a, the oxygen flow rate per unit of time, the total amount of oxygen supplied up to the time of measurement and on the age of the converter and thus de
- a switching stage 23 is provided in addition to the computer stages 20 and 21, which depends on the the ejection probability depends on the number of melts already driven with the converter lining.
- the resulting probability variable obtained via the linkage stage 22 can then be compared in a control device 24 with at least one limit value of the permissible ejection probability read in via an input 25, in order to reduce the lance distance a or the amount of oxygen supplied when this limit value is exceeded, by using the control device 24 the actuator 4 for the carriage 3 is controlled.
- An actuator 26 for a control valve 27 in the oxygen supply line 5 is used to control the amount of oxygen supplied.
- the actual values of the sound level measured during ejection can be read into the evaluation circuit 15 to correct the comparison variable via a command circuit 28, which results in a slag guidance with a low probability of ejection when the comparison variable specified via the input 16 is repeatedly corrected allowed.
- a sequence control 29 which controls the nitrogen supply via a switching valve 31 provided with an actuator 30 alternately with the measured value acceptance by the evaluation circuit 15.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1359/89A AT392801B (de) | 1989-06-05 | 1989-06-05 | Verfahren zur schlackenfuehrung in einem blasstahlkonverter |
AT1359/89 | 1989-06-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0402344A1 true EP0402344A1 (fr) | 1990-12-12 |
EP0402344B1 EP0402344B1 (fr) | 1994-08-10 |
Family
ID=3512186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90890142A Expired - Lifetime EP0402344B1 (fr) | 1989-06-05 | 1990-05-11 | Procédé pour la conduite de la scorie dans un convertisseur pour la fabrication d'acier |
Country Status (9)
Country | Link |
---|---|
US (1) | US5028258A (fr) |
EP (1) | EP0402344B1 (fr) |
JP (1) | JPH0328310A (fr) |
KR (1) | KR910001072A (fr) |
CN (1) | CN1021741C (fr) |
AT (1) | AT392801B (fr) |
CA (1) | CA2017121C (fr) |
DE (1) | DE59006741D1 (fr) |
ES (1) | ES2061005T3 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10111394B4 (de) * | 2001-03-09 | 2008-12-18 | Sms Demag Ag | Verfahren und Einrichtung zur Steuerung eines metallurgischen Prozesses mit Bildung von Schlacke auf einer Schmelzbadoberfläche |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10152371B4 (de) * | 2001-10-24 | 2004-04-15 | Sms Demag Ag | Verfahren und Vorrichtung zur Bestimmung der Schaumschlackenhöhen beim Frischvorgang in einem Blasstahlkonverter |
CN100535653C (zh) * | 2006-12-27 | 2009-09-02 | 山东建筑大学 | 转炉炼钢造渣吹炼噪声特征检测方法 |
EP1918703B1 (fr) * | 2007-02-07 | 2015-06-24 | Tata Steel UK Limited | Contrôle de l'épaisseur de la couche de scorie dans un processus métallurgique par des émissions acoustiques |
CN100494410C (zh) * | 2007-03-22 | 2009-06-03 | 龚幼清 | 炼钢转炉碳温氧检测探头的投放方法及其装置 |
US8808421B2 (en) | 2010-02-26 | 2014-08-19 | Tenova Goodfellow Inc. | System for furnace slopping prediction and lance optimization |
US8097063B2 (en) * | 2010-02-26 | 2012-01-17 | Tenova Goodfellow Inc. | System for furnace slopping prediction and lance optimization |
CN104001911A (zh) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | 鱼雷罐折铁作业中的监控及报警方法 |
US11391515B2 (en) | 2016-12-02 | 2022-07-19 | Tenova S.P.A. | Convertible metallurgical furnace and modular metallurgical plant comprising said furnace for conducting production processes for the production of metals in the molten state, in particular steel or cast iron |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2120799B2 (de) * | 1971-04-28 | 1972-11-23 | Verfahren zum regeln des lanzenanstandes beim sauerstoffaufblasverfahren nach massgabe der schallintensitaet der blasgeraeusche | |
DE1533898B2 (de) * | 1966-04-20 | 1974-05-16 | Centre De Recherches Metallurgiques - Centrum Voor Research In De Metallurgie, Bruessel | Verfahren zur automatischen Durchführung des Frischprozesses bei Roheisen |
EP0130960A2 (fr) * | 1983-06-06 | 1985-01-09 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Procédé pour surveiller le moussage de la scorie |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE447997B (sv) * | 1978-12-05 | 1987-01-12 | Kawasaki Steel Co | Sett att reglera slaggbildningen i en ld-konverter |
LU81740A1 (fr) * | 1979-09-28 | 1981-04-17 | Arbed | Systeme de mesure de l'epaisseur de la couche de scorie dans un recipient metallurgique et pour l'appreciation de son etat physique |
LU81859A1 (fr) * | 1979-11-07 | 1981-06-04 | Arbed | Procede de conditionnement de la scorie au cours de l'affinage d'un bain de metal |
-
1989
- 1989-06-05 AT AT1359/89A patent/AT392801B/de not_active IP Right Cessation
-
1990
- 1990-05-11 DE DE59006741T patent/DE59006741D1/de not_active Expired - Fee Related
- 1990-05-11 ES ES90890142T patent/ES2061005T3/es not_active Expired - Lifetime
- 1990-05-11 EP EP90890142A patent/EP0402344B1/fr not_active Expired - Lifetime
- 1990-05-18 CA CA002017121A patent/CA2017121C/fr not_active Expired - Fee Related
- 1990-05-25 US US07/530,018 patent/US5028258A/en not_active Expired - Fee Related
- 1990-05-31 KR KR1019900007957A patent/KR910001072A/ko not_active Application Discontinuation
- 1990-06-04 JP JP2146040A patent/JPH0328310A/ja active Pending
- 1990-06-05 CN CN90104075A patent/CN1021741C/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1533898B2 (de) * | 1966-04-20 | 1974-05-16 | Centre De Recherches Metallurgiques - Centrum Voor Research In De Metallurgie, Bruessel | Verfahren zur automatischen Durchführung des Frischprozesses bei Roheisen |
DE2120799B2 (de) * | 1971-04-28 | 1972-11-23 | Verfahren zum regeln des lanzenanstandes beim sauerstoffaufblasverfahren nach massgabe der schallintensitaet der blasgeraeusche | |
EP0130960A2 (fr) * | 1983-06-06 | 1985-01-09 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Procédé pour surveiller le moussage de la scorie |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10111394B4 (de) * | 2001-03-09 | 2008-12-18 | Sms Demag Ag | Verfahren und Einrichtung zur Steuerung eines metallurgischen Prozesses mit Bildung von Schlacke auf einer Schmelzbadoberfläche |
Also Published As
Publication number | Publication date |
---|---|
DE59006741D1 (de) | 1994-09-22 |
KR910001072A (ko) | 1991-01-30 |
CA2017121C (fr) | 1998-06-16 |
JPH0328310A (ja) | 1991-02-06 |
CN1021741C (zh) | 1993-08-04 |
EP0402344B1 (fr) | 1994-08-10 |
ATA135989A (de) | 1990-11-15 |
CA2017121A1 (fr) | 1990-12-05 |
AT392801B (de) | 1991-06-25 |
US5028258A (en) | 1991-07-02 |
ES2061005T3 (es) | 1994-12-01 |
CN1047886A (zh) | 1990-12-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0402344B1 (fr) | Procédé pour la conduite de la scorie dans un convertisseur pour la fabrication d'acier | |
DE2737832B2 (de) | Verwendung von im Querschnitt veränderlichen Blasdüsen zur Herstellung von rostfreien Stählen | |
DE102019201033A1 (de) | Verfahren zum automatisierten Ermitteln des Einflusses eines Schneidparameters beim Laserschneiden sowie Laserbearbeitungsmaschine und Computerprogrammprodukt | |
EP2823070B1 (fr) | Procédé d'actionnement d'une installation de fusion sous vide et installation de fusion sous vide actionnée par ce procédé | |
EP3108017B1 (fr) | Procédé de circulation d'un bain de métal et installation de four | |
DE3434894C2 (de) | Verfahren zum Frischen von Roheisen | |
DE102015221243A1 (de) | Laserschneidverfahren mit Strahlabschaltung am Schnittende sowie Laserschneidmaschine und Computerprogrammprodukt | |
EP0288680B1 (fr) | Procédé de cémentation gazeuse de l'acier | |
EP1530648B1 (fr) | Procedes et dispositif de decarburation d'une fonte d'acier | |
DE3025425C2 (de) | Verfahren und Vorrichtung zur Steuerung der Vakuumentgasung einer Stahlschmelze | |
DE2730599C3 (de) | Verfahren zur Steuerung eines Stahlfrischprozesses für Stähle mit einem C-Gehalt im Bereich von 0,1 bis 0,8 Gew.-% | |
DE68915234T2 (de) | Verfahren zum Einschmelzen kalter Stoffe, die Eisen enthalten. | |
DE19832701B4 (de) | Verfahren zur Erzeugung von Stahl | |
DE2208736C2 (de) | Verfahren zum Herstellen legierter Stähle | |
EP0186041B1 (fr) | Procédé et dispositif de guidage des chalumeaux de soudage à arc d'installations de soudage mécanisées | |
DE4101833C2 (fr) | ||
EP1560936A1 (fr) | Systeme d'alimentation de gaz destine a un four metallurgique et procede d'utilisation de ce systeme | |
EP1373583B1 (fr) | Dispositif pour eviter que des scories ne soient entrainees lors de la percee d'un metal en fusion | |
DE60001576T2 (de) | Verfahren zur entkohlung und entphosphorung einer metallschmelze | |
DE2931957A1 (de) | Verfahren zur herstellung von stahl mit niedrigem wasserstoffgehalt in einem sauerstoffdurchblaskonverter | |
DE102019209109A1 (de) | Konverter und Verfahren zum Frischen geschmolzenen Metalls | |
DE2651922A1 (de) | Verfahren zum steuern des frischverlaufs beim frischen von roheisen | |
DE19640125A1 (de) | Verfahren zur Erzielung einer Spiegelstörung | |
EP0621344A1 (fr) | Trempe flexible et adaptive | |
DE19614133A1 (de) | Verfahren zum elektroerosiven Schneiden, sowie hierfür geeignete Vorrichtung |
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): BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19910603 |
|
17Q | First examination report despatched |
Effective date: 19940117 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH (HRB 6375) |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
ITF | It: translation for a ep patent filed |
Owner name: STUDIO INGG. FISCHETTI & WEBER |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE CH DE DK 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: 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: 19940810 Ref country code: DK Effective date: 19940810 |
|
REF | Corresponds to: |
Ref document number: 59006741 Country of ref document: DE Date of ref document: 19940922 |
|
ET | Fr: translation filed | ||
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19940912 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2061005 Country of ref document: ES Kind code of ref document: T3 |
|
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH |
|
EAL | Se: european patent in force in sweden |
Ref document number: 90890142.4 |
|
NLT2 | Nl: modifications (of names), taken from the european patent patent bulletin |
Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH TE LINZ, OOS |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19950531 Ref country code: CH Effective date: 19950531 |
|
26 | Opposition filed |
Opponent name: HOOGOVENS GROEP B.V. IR. H.C. WENTZEL INDUSTRIAL P Effective date: 19950510 |
|
NLR1 | Nl: opposition has been filed with the epo |
Opponent name: HOOGOVENS GROEP B.V. IR. H.C. WENTZEL INDUSTRIAL P |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PLBO | Opposition rejected |
Free format text: ORIGINAL CODE: EPIDOS REJO |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19970411 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: 19970417 Year of fee payment: 8 |
|
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 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19970428 Year of fee payment: 8 Ref country code: LU Payment date: 19970428 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: 19970519 Year of fee payment: 8 |
|
27O | Opposition rejected |
Effective date: 19970119 |
|
NLR2 | Nl: decision of opposition | ||
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: 19980511 |
|
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: 19980512 |
|
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: 19980531 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980531 |
|
BERE | Be: lapsed |
Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU G.M.B.H. (HRB 63 Effective date: 19980531 |
|
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: 19981201 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19981201 |
|
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: 20000403 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20010412 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20010503 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010509 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
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: 20020511 |
|
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: 20020512 |
|
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: 20021203 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20020511 |
|
EUG | Se: european patent has lapsed | ||
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: 20050511 |