EP0565697A1 - Vorrichtung zur mikrowellen-bestrahlung von materialien. - Google Patents
Vorrichtung zur mikrowellen-bestrahlung von materialien.Info
- Publication number
- EP0565697A1 EP0565697A1 EP92923260A EP92923260A EP0565697A1 EP 0565697 A1 EP0565697 A1 EP 0565697A1 EP 92923260 A EP92923260 A EP 92923260A EP 92923260 A EP92923260 A EP 92923260A EP 0565697 A1 EP0565697 A1 EP 0565697A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microwave
- channel
- wall
- materials
- tube
- 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
- 239000000463 material Substances 0.000 title claims abstract description 41
- 230000001678 irradiating effect Effects 0.000 title description 2
- 230000005855 radiation Effects 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000011358 absorbing material Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 229910002110 ceramic alloy Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000001311 chemical methods and process Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- -1 cermets Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/78—Arrangements for continuous movement of material
- H05B6/784—Arrangements for continuous movement of material wherein the material is moved using a tubular transport line, e.g. screw transport systems
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/78—Arrangements for continuous movement of material
Definitions
- the invention relates to a device for microwave irradiation of materials according to the preamble of claim 1 or 2.
- DE-OS 32 24 114 such a device is known, which is used for heating liquids and in particular for cracking waste oil, which flows through pipes including a cracking tube made of oxide ceramics or similar, non-polar substances and by microwave radiation up to temperatures heated from about 700 ° C and is fractionated. To generate the microwave radiation, a number of so-called power packs are arranged along the cracking tube.
- This known device is disadvantageous in that its possible uses are limited to the heating of polar liquids by directly irradiating them with the microwaves and a change in the heating of the liquid cannot be carried out without a corresponding change in its radiation exposure.
- a plurality of antennas are provided in the form of transversely extending rods.
- layers of material are arranged one above the other in the exposure chamber, of which the upper layer consists of a microwave-absorbing material, while the lower layer consists of a dielectric material such as pyrocerane. It is the purpose of the
- the invention has for its object to be able to adjust the heating and radiation exposure of microwave-treated materials independently of each other.
- the devices according to the invention make it possible to achieve any desired ratio of the portion of the microwave radiation and the remaining portion of the microwave radiation that is used for heating the same (claim 1) or for heating the additional material (claim 2) and thus for indirectly heating the material to be treated. adjust the wall and / or the portion penetrating and entering the material to be treated along the direction of passage.
- the third parameter is the changeable one
- Radiant power of the microwaves generated by the respective generator It is possible, for example, to heat both polar and non-polar materials more strongly by increasing the radiation power and the microwave absorption through the wall, and by appropriately matching these two parameters to achieve that the wall corresponding to the increase in radiation power, i.e. more absorbed to the extent that as a further parameter the one passing through it
- the microwave absorption properties of the wall can be changed both by the choice of the microwave absorption capacity determined by the material composition of the wall and, in the case of a microwave-absorbing wall, by its thickness.
- the possibility of deliberately changing the ratio of the heating to the radiation exposure is advantageous in that, according to the latest findings, structural changes in materials are caused by microwave radiation and thus chemical processes are optimized by appropriate selection of the ratio of the heating to radiation exposure mentioned, and materials in particular are optimized with regard to their molecular and / or crystal structure can be changed.
- the device according to the invention is therefore also particularly suitable for the production of insulators, semiconductors, cermets, superconductors and other components, the properties of which can be influenced by changing their crystal structure.
- microwave-permeable walls it is possible to change the structure of non-polar materials without and that of polar materials with simultaneous heating, while a wall with a correspondingly high microwave absorption capacity and possibly a correspondingly large wall thickness can heat both polar and non-polar materials without structural changes enables.
- Structural changes with simultaneous heating can be carried out in a precisely coordinated ratio when using walls which are permeable or partially absorbent in the microwave part and, if necessary, corresponding wall thicknesses by means of microwaves of corresponding radiation power on polar and non-polar materials.
- a device upstream of the conveyor line is provided according to claim 2, by means of which the materials additional materials with high Microwave absorptivity can be added to achieve direct heating thereof. If separation is possible, these additional materials can be removed after the microwave irradiation has ended.
- Fig. 1 is a schematic representation of the first embodiment of the device according to the invention for performing a chemical conversion of a material
- Fig. 2 is a schematic representation of the second embodiment of the device according to the invention for producing ceramic components.
- the device according to FIG. 1 comprises a conveyor section defined by a tube 1, a conveyor track rotatably mounted in the tube and rotatable by a drive, not shown
- Transport screw 2 several, for example, three generators 3.1, 3.2 and 3.3 of conventional design and controllable power for generating microwave Rays 4.1, 4.2 and 4.3 as well as a resonator 5 of likewise conventional construction, which is designed as a metal chamber surrounding the tube 1 in places and serves to reduce the intensity and density of the microwaves 4.1 generated by the generators 3.1-3.3 and fed in by waveguides, not shown -4.3 and to prevent the same from escaping to the outside.
- the device further comprises sensors for controlling the method, such as temperature sensors 6 (only one of which is shown) for measuring the temperature of the tube 1.
- the tube 1 is made entirely of ceramic with an additive made of an electrically and / or magnetically conductive substance (for example C, SiC, metal, etc.), the percentage of which changes in such a way that the tube has a microwave absorption capacity, which is above its length changes gradually: the tube sections assigned to the two end regions of the resonator 5 and characterized by wide hatching are almost completely microwave-permeable, while the tube section assigned to the central region absorbs microwaves with narrow hatching. To increase the microwave absorption, the middle tube section may have a greater wall thickness than the adjacent tube sections.
- an electrically and / or magnetically conductive substance for example C, SiC, metal, etc.
- the device according to FIG. 1 can be used to carry out a chemical process with the targeted implementation of, for example, a polar material 7 which, for example, is to be heated to different temperatures in the three successive tube sections with constant radiation exposure.
- the material 7 is fed to the tube 1 in the form of granules, not shown, and is transported through the tube sections in the region of the resonator 5 in the transport direction 8 by means of the rotating transport screw 2. It first reaches the tube section in the left-hand region (in FIG. 1) of the resonator 5 and is directly heated there by the microwave radiation 4.1 generated by the generator 3.1 and passing almost completely through the tube wall until its melting temperature is reached.
- the material 7 is exposed to a radiation load corresponding to the power of the microwave radiation 4.1.
- the material 7 is further heated by means of the microwave radiation 4.2 generated by the generator 3.2 with a correspondingly higher power compared to the generator 3.1.
- the tube wall has such a microwave absorption capacity (possibly also wall thickness) that is matched to this higher radiation power that it has the same radiation component as the tube wall in the preceding Lets pass through pipe section and thus causes the same radiation exposure and the same direct heating of the material 7. The remaining radiation component absorbed by the tube wall and heating it causes the further heating of the material 7 to the temperature required for its implementation. After the implementation has ended, the material 7 reaches the subsequent third tube section.
- the material 7 cools in this third tube section with the same radiation load until the melting temperature is reached.
- a more uniform heating of the material 7 can be achieved by using a screw conveyor 2 consisting of a microwave-absorbing substance.
- the device according to FIG. 2 differs from that according to FIG. 1 by using a tube which is composed of several (eg three) separate tube sections 9.1, 9.2 and 9.3, a resonator which also consists of several sections 10.1 to 10.3 and one the conventional extruder 11 (only indicated) upstream of the pipe 9.1 to 9.3 instead of the transport screw located in the pipe.
- a tube which is composed of several (eg three) separate tube sections 9.1, 9.2 and 9.3
- a resonator which also consists of several sections 10.1 to 10.3 and one the conventional extruder 11 (only indicated) upstream of the pipe 9.1 to 9.3 instead of the transport screw located in the pipe.
- One of the generators 3.1-3.3 according to FIG. 1 is assigned to each pipe section 9.1-9.3 and each resonator section 10.1-10.3.
- the tube wall of the middle tube section 9.2 consists of almost completely microwave-permeable ceramic, while the two adjacent tube sections 9.1 and 9.3 have a corresponding microwave absorption capacity due to the addition of, for example, carbon or silicon carbide (SiC). If necessary. the wall thickness and thus the microwave absorption can be increased.
- SiC silicon carbide
- the device according to FIG. 2 can be used for the production of components from ceramic materials with a crystal structure which is influenced by microwave radiation.
- an imageable mixture 12 of the starting materials of these ceramic materials is fed to the extruder 11 through a funnel opening 13 and transported through the pipe 9.1-9.3 in the transport direction 8 by its screw conveyor.
- the mixture 12 first reaches the pipe section 9.1 adjacent to the extruder 11 and is heated there to a temperature above the crystallization point by the pipe wall, which is heated by the portion of the microwave radiation 14.1 generated by the generator 3.1. of the ceramic material.
- the portion of the microwave radiation 14.1 passing through the tube wall has the same, specific power which is required for influencing the crystal structure in a desired manner as the entire microwave radiation 14.2 generated by the subsequent generator 3.2.
- the mixture 12 is cooled due to its non-polar property and thus its crystallization. This is influenced in the desired manner by the microwave radiation 14.2 generated by the generator 3.2 with a lower power, which is almost completely penetrated by the microwave-permeable tube wall.
- the radiation exposure of the mixture 12 is the same as in the previous pipe section 9.1.
- the mixture 12 is heated and burned to the firing temperature by means of the microwave radiation 14.3 generated by the generator 3.3 and correspondingly higher power.
- the heating takes place indirectly through the tube wall, the microwave absorption capacity and possibly wall thickness is set so that the radiation portion absorbed by it is sufficient to achieve the firing temperature and the remaining radiation portion has the same radiation exposure of the mixture 12 as in the two preceding tube sections 9.1 and 9.2 evokes.
- the power of the generator 3.3 is greater than that of the generator 3.1, while the generator 3.2 has the smallest power which determines the radiation exposure of the mixture 12.
- the excess power of the two generators 3.1 and 3.3 serves to heat the mixture 12 up to the respective temperature. After the fire has ended, the finished ceramic material is expelled as an endless strand 15 from the free end of the pipe section 9.3.
- the device according to the invention can of course also be used to treat materials of a consistency other than that described so far, for example in liquid or suspended form by means of appropriate conveying means, such as rotating pipes, conveyor belts, etc.
- the microwaves can also be pulsed in order to influence the structure of the materials.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Furnace Details (AREA)
- Vending Machines For Individual Products (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4136416A DE4136416C2 (de) | 1991-11-05 | 1991-11-05 | Vorrichtung zur Mikrowellen-Bestrahlung von Materialien |
DE4136416 | 1991-11-05 | ||
PCT/EP1992/002537 WO1993009647A1 (de) | 1991-11-05 | 1992-11-05 | Vorrichtung zur mikrowellen-bestrahlung von materialien |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0565697A1 true EP0565697A1 (de) | 1993-10-20 |
EP0565697B1 EP0565697B1 (de) | 1997-03-26 |
Family
ID=6444129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92923260A Expired - Lifetime EP0565697B1 (de) | 1991-11-05 | 1992-11-05 | Vorrichtung zur mikrowellen-bestrahlung von materialien |
Country Status (5)
Country | Link |
---|---|
US (1) | US5408074A (de) |
EP (1) | EP0565697B1 (de) |
AT (1) | ATE150930T1 (de) |
DE (2) | DE4136416C2 (de) |
WO (1) | WO1993009647A1 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4324606C2 (de) * | 1993-07-22 | 1997-11-20 | Helmut Fleischmann | Heizungsanlagen |
DE4324635A1 (de) * | 1993-07-22 | 1995-01-26 | Abb Patent Gmbh | Einrichtung zur Sinterung keramischer Körper mittels Mikrowellen |
DE19515342A1 (de) * | 1995-04-26 | 1996-10-31 | Widia Gmbh | Verfahren, Vorrichtung zur thermischen Behandlung von Stoffen in einem Mikrowellenofen und Verwendung dieses Verfahrens und dieser Vorrichtung |
DE19606517C2 (de) * | 1996-02-22 | 1998-07-02 | Koettnitz Andreas Dipl Wirtsch | Druckreaktor mit Mikrowellenheizung für kontinuierlichen Betrieb |
DE19648366C1 (de) * | 1996-11-22 | 1998-04-02 | Riedhammer Gmbh Co Kg | Anlage zur thermischen Behandlung von Produkten |
EP1007892B1 (de) * | 1997-04-10 | 2010-09-01 | Nucon Systems Inc. | Verfahren herstellung von keramischen gegenständen mit dicken wandungen |
CA2635001C (en) * | 1997-08-20 | 2012-12-04 | Ervin Essenfeld | High quality, continuous throughput, tissue fixation-dehydration-fat removal-impregnation |
US6248985B1 (en) | 1998-06-01 | 2001-06-19 | Stericycle, Inc. | Apparatus and method for the disinfection of medical waste in a continuous manner |
WO2000000311A1 (en) * | 1998-06-26 | 2000-01-06 | Hpm Stadco, Inc. | Microwave processing system for metals |
DE10227836B4 (de) * | 2002-06-21 | 2006-02-09 | Mikrowellen-Systeme Mws Gmbh | Verfahren, Verwendung des Verfahrens sowie Verwendung eines Mikrowellenheizgeräts zum Mischen und zur Auslösung von chemischen Reaktionen von Feststoffgemischen oder Suspensionen in einem Mikrowellenfeld |
JP4133252B2 (ja) * | 2002-11-19 | 2008-08-13 | 株式会社デンソー | セラミック成形体の乾燥方法及び乾燥装置 |
EP1464388A1 (de) * | 2003-04-04 | 2004-10-06 | Mikrowellen-Systeme MWS GmbH | Mikrowellen-Behandlung von chemischen Substanzen in einem Behälter |
JP4527122B2 (ja) * | 2003-10-24 | 2010-08-18 | ザ ユニバーシティー オブ マイアミ | 組織処理の簡素化 |
CN101068939A (zh) * | 2004-09-30 | 2007-11-07 | 技术资源有限公司 | 矿物的微波处理 |
US7161126B2 (en) * | 2004-11-10 | 2007-01-09 | Bwxt Y-12, Llc | Microwave heat treating of manufactured components |
FR2903861B1 (fr) * | 2006-07-24 | 2011-04-15 | Campbell France Sas | Systeme de chauffage ohmique avec circulation par vis sans fin |
US9239188B2 (en) * | 2008-05-30 | 2016-01-19 | Corning Incorporated | System and method for drying of ceramic greenware |
GB2498736A (en) * | 2012-01-25 | 2013-07-31 | Nov Downhole Eurasia Ltd | Apparatus and method for treating hydrocarbon containing materials |
DE102013013401A1 (de) | 2013-08-02 | 2015-02-05 | Harald Benoit | Nutzung von Siliciumcarbid (Dielektrikum)als ggf. Verbrauchsmaterial zur Erwärmung dünner Materialschichten mittels Mikrowellenstrahlung |
AU2014354829B2 (en) * | 2013-11-27 | 2019-01-17 | Tetra Laval Holdings & Finance S.A. | Cheese-making methods and apparatuses |
GB201400983D0 (en) * | 2014-01-21 | 2014-03-05 | Nov Downhole Eurasia Ltd | Extraction of hydrocarbons |
EP3433430B1 (de) | 2016-03-23 | 2022-08-17 | A.L.M. Holding Company | Chargenasphaltmischanlage |
WO2021003250A2 (en) | 2019-07-01 | 2021-01-07 | A.L.M Holding Company | Microwave heating system with suppression tunnel and related features |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3277580A (en) * | 1963-07-05 | 1966-10-11 | Hammtronics Systems Inc | Method and apparatus for drying |
US3474209A (en) * | 1967-04-10 | 1969-10-21 | Rca Corp | Dielectric heating |
US3624335A (en) * | 1970-06-25 | 1971-11-30 | Raytheon Co | Microwave oven |
US3665141A (en) * | 1970-07-01 | 1972-05-23 | Dca Food Ind | End trap for microwave oven |
DE2256911C2 (de) * | 1972-11-20 | 1982-03-04 | Hoechst Ag, 6000 Frankfurt | Digoxigenin-12-formiat und Verfahren zu seiner Herstellung |
US3805009A (en) * | 1973-01-18 | 1974-04-16 | Pillsbury Co | Apparatus for supplying microwave energy to foods as they are fried |
US3851132A (en) * | 1973-12-10 | 1974-11-26 | Canadian Patents Dev | Parallel plate microwave applicator |
US3983356A (en) * | 1974-04-30 | 1976-09-28 | Gerling Moore Inc. | End load for microwave ovens |
JPS5230938A (en) * | 1975-09-04 | 1977-03-09 | Toshiba Corp | Microwave heating appartus |
JPS5829590B2 (ja) * | 1975-09-04 | 1983-06-23 | 株式会社東芝 | マイクロハカネツホウホウ |
US4045638A (en) * | 1976-03-09 | 1977-08-30 | Bing Chiang | Continuous flow heat treating apparatus using microwaves |
US4307277A (en) * | 1978-08-03 | 1981-12-22 | Mitsubishi Denki Kabushiki Kaisha | Microwave heating oven |
JPS56128592A (en) * | 1980-03-12 | 1981-10-08 | Doryokuro Kakunenryo | Method and device for heating with microwave |
FR2478418A1 (fr) * | 1980-03-13 | 1981-09-18 | Soulier Joel | Nouveau dispositif pour le traitement thermique de matieres en poudre ou en grains |
DE3224114A1 (de) * | 1982-06-29 | 1983-12-29 | Rivi Establishment, 9490 Vaduz | Verfahren zum erwaermen von fluessigkeiten mit dabei zur bildung von ablagerungen neigenden bestandteilen |
EP0113900B1 (de) * | 1982-12-22 | 1988-11-23 | Bühler AG | Einrichtung und Verfahren zur Behandlung von Nahrungsmitteln mit Mikrowellen |
NZ206150A (en) * | 1983-11-04 | 1987-06-30 | Nz Government | Food processor; screw conveyor pitch wider in microwave chamber than preheating chamber |
US4570045A (en) * | 1984-03-08 | 1986-02-11 | Jeppson Morris R | Conveyorized microwave heating chamber with dielectric wall structure |
JPS60260035A (ja) * | 1984-06-06 | 1985-12-23 | Fuji Photo Film Co Ltd | 蓄積性螢光体シ−トの残像消去方法および装置 |
US4687895A (en) * | 1984-07-30 | 1987-08-18 | Superwave Technology, Inc. | Conveyorized microwave heating system |
US4822966A (en) * | 1987-02-20 | 1989-04-18 | Yuzuru Matsubara | Method of producing heat with microwaves |
US4866231A (en) * | 1988-04-01 | 1989-09-12 | Schneider David R | Microwave chamber for heating biological matter |
US5019680A (en) * | 1988-06-14 | 1991-05-28 | Sharp Kabushiki Kaisha | Heat generating container for microwave oven |
DE3936267C2 (de) * | 1989-10-31 | 1997-12-11 | Werner Lautenschlaeger | Einsatzteil für einen Mikrowellenofen |
-
1991
- 1991-11-05 DE DE4136416A patent/DE4136416C2/de not_active Expired - Fee Related
-
1992
- 1992-11-05 WO PCT/EP1992/002537 patent/WO1993009647A1/de active IP Right Grant
- 1992-11-05 EP EP92923260A patent/EP0565697B1/de not_active Expired - Lifetime
- 1992-11-05 US US08/084,205 patent/US5408074A/en not_active Expired - Fee Related
- 1992-11-05 AT AT92923260T patent/ATE150930T1/de not_active IP Right Cessation
- 1992-11-05 DE DE59208276T patent/DE59208276D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9309647A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0565697B1 (de) | 1997-03-26 |
DE4136416A1 (de) | 1993-05-06 |
US5408074A (en) | 1995-04-18 |
DE4136416C2 (de) | 1994-01-13 |
DE59208276D1 (de) | 1997-04-30 |
ATE150930T1 (de) | 1997-04-15 |
WO1993009647A1 (de) | 1993-05-13 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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