EP1053391A1 - Dispositif d'epuration catalytique de gaz d'echappement et couche de compensation correspondante, notamment pour vehicules a moteur - Google Patents

Dispositif d'epuration catalytique de gaz d'echappement et couche de compensation correspondante, notamment pour vehicules a moteur

Info

Publication number
EP1053391A1
EP1053391A1 EP99906117A EP99906117A EP1053391A1 EP 1053391 A1 EP1053391 A1 EP 1053391A1 EP 99906117 A EP99906117 A EP 99906117A EP 99906117 A EP99906117 A EP 99906117A EP 1053391 A1 EP1053391 A1 EP 1053391A1
Authority
EP
European Patent Office
Prior art keywords
mat
exhaust gas
swelling
insulating mat
compensation layer
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.)
Withdrawn
Application number
EP99906117A
Other languages
German (de)
English (en)
Inventor
Wolfgang Maus
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
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 Emitec Gesellschaft fuer Emissionstechnologie mbH filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP1053391A1 publication Critical patent/EP1053391A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2857—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2864—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets comprising two or more insulation layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • Catalytic exhaust gas cleaning device and associated compensation layer in particular for motor vehicles
  • the present invention relates to a catalytic exhaust gas purification device, in particular for motor vehicles, according to the preamble of claim 1 and an associated compensation layer according to the preamble of claim 9
  • Exhaust gas cleaning devices are required - differentiated by the structure and / or by the type of catalytically effective surface coating - both for diesel-powered vehicles, which include soot afterburning, and for the detoxification of exhaust gases from gasoline engines.
  • a major problem in all cases is here the permanent, safe and, in particular, shock-absorbed storage of fracture-sensitive ceramic honeycomb bodies, as are often used in exhaust gas cleaning devices, in a metallic housing, this problem being compounded by the fact that the housing expands much more than the honeycomb body when the temperature rises
  • the swelling mat is capable of being caused by different behavior of the housing and honeycomb body and filling cavities created by manufacturing tolerances by swelling and thus ensuring safe storage over a long period of operation.
  • Source mats usually contain mica fragments which, if there is space in their surroundings, absorb water and expand in the process
  • a disadvantage of such swelling mats, like the mats based on aluminum silicate fiber that are preferably used for such cases, is that they are very easily removed by pulsating exhaust gas flows
  • shielding funnels made of metal which are arranged in a minimum distance due to thermal changes in length in front of the end face of a ceramic honeycomb body.
  • An advantageous further development of this solution provides shielding funnels made of ceramic material which now have the same expansion coefficients their end faces lie directly on the ceramic honeycomb body
  • a storage mat with a layer of "intumescent”, that is to say swelling material, is known, which is provided with at least one insert made of elastic, flexible, less strong or non-intumescent material to protect against ablation
  • thermally insulating layer between the housing and the honeycomb body
  • This thermally insulating layer can be an air layer which isolates the housing from the high temperatures occurring in the honeycomb body when the catalytic exhaust gas cleaning device is used due to the low heat conduction and heat convection properties of the air.
  • swelling mats for holding honeycomb bodies release water at a very high ambient temperature of, for example, over 800 ° C and shrink, which can loosen the honeycomb body in the housing
  • swelling mats must be thermally insulated against the honeycomb body in certain highly polluted exhaust gas cleaning devices, for which purpose it already exists it is known to first provide the honeycomb body with a so-called insulating mat, that is to say with a thermally insulating layer, preferably made of ceramic material, and only then to surround it with a swelling mat.
  • the invention has for its object to achieve a safe shielding of the source mat against strongly pulsating exhaust gas flows even at very high ambient temperatures with an even simpler structure.
  • the insulating mat has a thicker edge in the area of at least one end face of the honeycomb body than in the remaining inner area, a swelling mat being arranged adjacent to the side of the insulating mat facing away from the honeycomb body in such a way that the thicker area of the edge of the insulating mat shows the edge surfaces of the source mat which are at risk of abrasion covers, the source mat is shielded from strongly pulsating exhaust gases and thermally insulated with respect to heat conduction and heat convection.
  • any cavities remaining between the housing and the honeycomb body during manufacture or which form during operation are advantageously closed by the swelling mat by closing their adjacent cavities by swelling when water is absorbed. This results in a permanent safe, in particular shock-absorbent, storage of the break-sensitive ceramic honeycomb body.
  • a particularly advantageous development of the invention provides that the thicker area of the border can be produced by folding over the insulating mat.
  • a further advantageous embodiment of the compensation layer comprising a swelling mat and an insulating mat is also present in terms of production technology if the insulating mat with thicker edges and the swelling mat are designed as a composite material. This can preferably be wound at least once or, in the case of higher insulation requirements, also several times in the circumferential direction, for example around a honeycomb body.
  • the compensating layer formed as a composite material can be composed of prefabricated cylindrical, oval or other contoured segments of a housing, in particular half-shell segments. - 5 -
  • Fig 1 A section of an exhaust gas purification device, partially cut and
  • FIG. 2 shows a composite material consisting of a swelling mat and a
  • FIG. 1 shows a partially sectioned section of an exhaust gas purification device 1 according to the invention, in which a honeycomb body 2, wrapped by a compensating layer 4, is arranged in a housing 3
  • the honeycomb body 2 is preferably a monolithic ceramic honeycomb body, in particular made of so-called thin-wall ceramic.
  • honeycomb body 2 constructed from thin metal sheets can also be held in a similar manner, thermal insulation with respect to the preferably metallic housing 3 also being sought.
  • the mounting and insulation is achieved by a compensating layer 4, comprising a layer of ceramic material, preferably a swelling mat 5, and a further, thermally insulating layer, a so-called insulating mat 6.
  • the compensating layer 4 which on the one hand, the honeycomb body 2 holds securely in the housing 3 and, on the other hand, very good thermal insulation results in the insulating mat 6, which is made of a ceramic material and has a very low thermal conductivity and thus prevents heat conduction and convection from the honeycomb body 2 to the housing 3 and contains the source mat 5 Mica pieces, which, if there is space in their surroundings, absorb water and thereby expand.
  • the swelling mat 5 fills the cavities created by different behavior of the housing 3 and honeycomb body 2 and by manufacturing tolerances, and thus ensures over one long storage period, secure storage of the honeycomb body 2 in the housing 3 .
  • Source mats 5 and insulating mats 6 made of ceramic material are typically fiber mats, as are known from the prior art for holding ceramic honeycomb bodies 2, with a thickness as used to compensate for manufacturing tolerances of the outer housing 3 and the honeycomb body 2 and for holding them over one long operating period are required. It should also be noted that to improve the thermal insulation, especially when very high operating temperatures, such as occur, for example, in an arrangement close to the outlet of an internal combustion engine, affect the exhaust gas cleaning device 1, several compensation layers 4 and / or only additional layers of the thermally insulating Layer 6, which follow one another radially, can be provided.
  • the compensating layer 4 which is formed as a composite material from an insulating mat 6 and a swelling mat 5 and which can preferably be wound around the honeycomb body 2 at least once in the circumferential direction.
  • the compensating layer 4, which is designed as a composite material is composed of prefabricated cylindrical, oval or other contours of the housing 3, in particular half-shell segments. If the insulating mat 6, that is, the thermally insulating layer at least in the thicker area of its boundary 7 from long Ceramic fibers, it is not very susceptible to abrasion by pulsating exhaust gases, so that the protection of the abrasion-prone edge surfaces 9 of the swelling mat 5 is sufficient due to the thicker area of the edges 7 of the insulating mat 6.
  • the present invention is distinguished by a particularly simple and at the same time effective construction and is also suitable for applications close to the engine in catalytic exhaust gas purification devices 1 of motor vehicles. It enables safe storage of honeycomb bodies 2, at the same time brings about good thermal insulation of the honeycomb body 2 in the housing 3 and protects the layer 5 of the compensating layer 4 containing the source material adequately against abrasion by pulsating exhaust gas flows.

Abstract

L'invention concerne un dispositif d'épuration catalytique de gaz d'échappement (1) et une couche de compensation correspondante (4), notamment pour véhicules à moteur. Ce dispositif assure une protection efficace d'un "mat gonflant "(5) contre les flux de gaz d'échappement fortement pulsés, même en présence de températures ambiantes très élevées. A cet effet, une couche de compensation (4) comprenant le mat gonflant (5) et un mat isolant (6) est placée entre un boîtier extérieur (3) et un corps alvéolaire (2). Une bordure (7), plus épaisse au niveau d'au moins un côté frontal du corps alvéolaire (2) que dans la zone intérieure restante (8) du mat isolant (6), est produite de préférence par repliement du mat isolant (6). Le mat gonflant (5) est placé à proximité du côté opposé au corps alvéolaire (2), de la zone intérieure (8), de sorte que la zone la plus épaisse de la bordure (7) du mat isolant (6) recouvre les zones marginales du mat gonflant (5), exposées à l'abrasion. La couche de compensation (4) se présente de préférence sous la forme d'un matériau composite pouvant être enroulé. Le dispositif selon l'invention est caractérisé par une conception particulièrement simple et efficace, et convient à des unités situées à proximité du moteur dans des dispositifs d'épuration de gaz d'échappement (1) de véhicules à moteur, même en cas d'utilisation de corps alvéolaires en céramique à faible épaisseur de paroi.
EP99906117A 1998-02-03 1999-01-12 Dispositif d'epuration catalytique de gaz d'echappement et couche de compensation correspondante, notamment pour vehicules a moteur Withdrawn EP1053391A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19804213A DE19804213A1 (de) 1998-02-03 1998-02-03 Katalytische Abgasreinigungseinrichtung und zugehörige Ausgleichsschicht, insbesondere für Kraftfahrzeuge
DE19804213 1998-02-03
PCT/EP1999/000127 WO1999040300A1 (fr) 1998-02-03 1999-01-12 Dispositif d'epuration catalytique de gaz d'echappement et couche de compensation correspondante, notamment pour vehicules a moteur

Publications (1)

Publication Number Publication Date
EP1053391A1 true EP1053391A1 (fr) 2000-11-22

Family

ID=7856514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99906117A Withdrawn EP1053391A1 (fr) 1998-02-03 1999-01-12 Dispositif d'epuration catalytique de gaz d'echappement et couche de compensation correspondante, notamment pour vehicules a moteur

Country Status (10)

Country Link
US (1) US7179429B1 (fr)
EP (1) EP1053391A1 (fr)
JP (1) JP4278865B2 (fr)
KR (1) KR100538393B1 (fr)
CN (1) CN1185406C (fr)
AU (1) AU2616499A (fr)
DE (1) DE19804213A1 (fr)
PL (1) PL342029A1 (fr)
RU (1) RU2187002C2 (fr)
WO (1) WO1999040300A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4652553B2 (ja) 2000-11-10 2011-03-16 イビデン株式会社 触媒コンバータ及びその製造方法
JP4652555B2 (ja) * 2000-11-10 2011-03-16 イビデン株式会社 触媒コンバータ、触媒コンバータ用保持シール材
WO2002038922A1 (fr) * 2000-11-10 2002-05-16 Ibiden Co., Ltd. Convertisseur catalytique et procede de fabrication de celui-ci
US7645426B2 (en) * 2004-04-14 2010-01-12 3M Innovative Properties Company Sandwich hybrid mounting mat
WO2007044485A1 (fr) 2005-10-13 2007-04-19 3M Innovative Properties Company Mât de montage multicouche et dispositif de lutte contre la pollution comprenant ledit mât
WO2007047273A2 (fr) * 2005-10-19 2007-04-26 3M Innovative Properties Company Mats multicouches et dispositifs de lutte contre la pollution les contenant
US8961881B2 (en) * 2007-04-17 2015-02-24 Honeywell International Inc. Multi-stage catalytic air purification system
JP5077659B2 (ja) 2007-07-20 2012-11-21 ニチアス株式会社 触媒コンバーター及び触媒コンバーター用保持材
JP2009156254A (ja) * 2007-12-05 2009-07-16 Ibiden Co Ltd 排気ガス処理体の保持シール部材及び排気ガス処理装置
DE202008005112U1 (de) 2008-04-12 2009-05-20 Porextherm-Dämmstoffe Gmbh Wärmedämmformkörper und damit ausgestattete Abgasreinigungsanlage
JP5183296B2 (ja) * 2008-05-15 2013-04-17 イビデン株式会社 保持シール材、保持シール材の製造方法及び排ガス浄化装置
US8505203B2 (en) 2010-09-30 2013-08-13 Tenneco Automotive Operating Company Inc. Method of installing a longitudinally offset multi-layer mat in an exhaust gas aftertreatment or acoustic device
US8752290B2 (en) 2010-09-30 2014-06-17 Tenneco Automotive Operating Company Inc. Method of installing a longitudinally offset multi-layer mat in an exhaust gas aftertreatment or acoustic device
JP2013083154A (ja) 2011-10-05 2013-05-09 Ibiden Co Ltd 保持シール材、保持シール材の製造方法、排ガス浄化装置、及び、排ガス浄化装置の製造方法
JP5912605B2 (ja) * 2012-02-03 2016-04-27 本田技研工業株式会社 排気マフラー装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344922A (en) * 1972-03-21 1982-08-17 Zeuna-Staerker Kg Catalyzer for detoxifying exhaust gases from internal combustion
DE8019813U1 (de) 1980-07-24 1980-10-23 Paul Gillet Gmbh, 6732 Edenkoben Keramikquellmatte, insbesondere zur Lagerung von Katalysatorblöcken in Kraftfahrzeug-Abgasanlagen
US4863700A (en) * 1985-04-16 1989-09-05 Stemcor Monolithic catalytic converter mounting arrangement
US4929429A (en) * 1988-02-11 1990-05-29 Minnesota Mining And Manufacturing Company Catalytic converter
US4999168A (en) * 1989-05-01 1991-03-12 The Carborundum Company Crack resistant intumescent sheet material
US5882608A (en) 1996-06-18 1999-03-16 Minnesota Mining And Manufacturing Company Hybrid mounting system for pollution control devices
EP0884459A3 (fr) * 1997-06-13 2002-12-11 Corning Incorporated Substrats de convertisseurs catalytiques enduits et supports

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9940300A1 *

Also Published As

Publication number Publication date
KR20010040610A (ko) 2001-05-15
WO1999040300A1 (fr) 1999-08-12
JP4278865B2 (ja) 2009-06-17
US7179429B1 (en) 2007-02-20
CN1185406C (zh) 2005-01-19
JP2002502930A (ja) 2002-01-29
RU2187002C2 (ru) 2002-08-10
AU2616499A (en) 1999-08-23
KR100538393B1 (ko) 2005-12-23
CN1289390A (zh) 2001-03-28
DE19804213A1 (de) 1999-08-05
PL342029A1 (en) 2001-05-07

Similar Documents

Publication Publication Date Title
EP1053391A1 (fr) Dispositif d'epuration catalytique de gaz d'echappement et couche de compensation correspondante, notamment pour vehicules a moteur
EP1047865B1 (fr) Ensemble corps alveolaire presentant une couche intermediaire renfermant au moins une feuille metallique
EP1690744B1 (fr) Dispositif de blindage, notamment un ecran de protection thermique
DE10307028B3 (de) Anordnung zur Überführung der Abgase eines Verbrennungsmotors in eine Abgasleitung
DE69723870T2 (de) Vorrichtung und verfahren zur schalldämpfung in einem transportsystem für gasförmige stoffe und anwendung einer solchen vorrichtung in einem abgassystem eines schiffes
EP0205895A1 (fr) Tuyau d'échappement d'un moteur à combustion
EP2969665B1 (fr) Ensemble module coussin gonflable de sécurité pour un véhicule automobile
EP0778918B1 (fr) Reacteur catalytique
EP0256416B1 (fr) Dispositif d'épuration de gaz d'échappement
DE10334307B4 (de) Isolierte Abgasleitung
DE19723943C1 (de) Hitzeschild
EP1838555A2 (fr) Element constitutif structural, notamment element de protection
EP0306705B1 (fr) Support pour la fabrication d'un réacteur catalytique pour la purification de gaz d'échappement
DE102009052644B4 (de) Wärmeabschirmungsblech für Abgasanlagen von Kraftfahrzeugen
DE3922636C1 (en) Thermally shielding ICE construction parts - using device comprising metal shield or film coated with heat insulation material
EP0450348A1 (fr) Convertisseur catalytique pour moteurs à combustion interne
DE102005008667B4 (de) Abschirmteil, insbesondere Hitzeschild
DE2856186C2 (de) Flachdichtung, insbesondere Zylinderkopfdichtung
EP0914548A1 (fr) Collecteur d'echappement pour moteurs a combustion interne et son procede de fabrication
DE102018106834A1 (de) Abgasanlagenkomponente
DE19962311B4 (de) Katalytische Abgasreinigungsvorrichtung
EP1241331B1 (fr) Cône d'entrée et de sortie d'un boîtier de catalyseur
EP1702803A2 (fr) Elément structurel, nottament un elément d'ecran
DE102008036046A1 (de) Abgasanlage für eine Brennkraftmaschine
DE10127223A1 (de) Heizungseinrichtung für Filterelemente eines Partikelfilters und Partikelfilter

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: 20000828

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR IT

17Q First examination report despatched

Effective date: 20010806

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20020219