EP1178519A1 - Ampoule en quartz avec au moins une traversée éléctrique, procédé pour la fabrication d'une connexion étanche aux gaz entre les deux, et son utilisation dans une lampe à décharge - Google Patents

Ampoule en quartz avec au moins une traversée éléctrique, procédé pour la fabrication d'une connexion étanche aux gaz entre les deux, et son utilisation dans une lampe à décharge Download PDF

Info

Publication number
EP1178519A1
EP1178519A1 EP01116803A EP01116803A EP1178519A1 EP 1178519 A1 EP1178519 A1 EP 1178519A1 EP 01116803 A EP01116803 A EP 01116803A EP 01116803 A EP01116803 A EP 01116803A EP 1178519 A1 EP1178519 A1 EP 1178519A1
Authority
EP
European Patent Office
Prior art keywords
sio
glass bulb
composite material
noble metal
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.)
Granted
Application number
EP01116803A
Other languages
German (de)
English (en)
Other versions
EP1178519B1 (fr
Inventor
David Francis Dr. Lupton
Jörg Schielke
Friedhold Schölz
Holger Zingg
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.)
Heraeus Deutschland GmbH and Co KG
Original Assignee
WC Heraus GmbH and Co KG
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 WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Publication of EP1178519A1 publication Critical patent/EP1178519A1/fr
Application granted granted Critical
Publication of EP1178519B1 publication Critical patent/EP1178519B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/46—Leading-in conductors

Definitions

  • the invention relates to an SiO 2 glass bulb with at least one feedthrough made of a gas-tight composite material, the composite material being formed from a noble metal with a melting point> 1700 ° C. and from SiO 2 , and the composite material being at least partially covered with an SiO 2 layer is.
  • the invention further relates to a high-power discharge lamp and a method for producing a gas-tight connection between an SiO 2 glass bulb and a current leadthrough.
  • EP 0 938 126 A1 describes a current feedthrough made of a composite material for a lamp, in particular a discharge lamp, the composite material being formed from SiO 2 and metal and the metal content changing over the length of the current feedthrough.
  • the metal content can change from 0 to 100%.
  • the side with the low molybdenum content is connected gas-tight to the lamp bulb in the direction of the discharge space of the lamp.
  • only the end face of the current leadthrough, which consists mainly or entirely of SiO 2 is in direct contact with the gas in the discharge space.
  • a metal electrode holder is sintered into the current feedthrough on the side of the low metal content, this holder immersing so far into the current feedthrough that direct contact is made with a composite area in which the SiO 2 content is ⁇ 80%. This creates an electrical contact between the bracket and the metal-rich side of the current feedthrough.
  • a metal powder made of molybdenum with an average particle size d 50 of 1 ⁇ m and a glass powder with an average particle size d 50 of 5.6 ⁇ m is disclosed.
  • EP 0 930 639 A1 likewise discloses a current feedthrough with a metal content which changes over its length together with an SiO 2 lamp bulb, tungsten, platinum, nickel, tantalum and zircon being mentioned as suitable metals for the composite material in addition to molybdenum.
  • a protective layer of glass, metal oxide, noble metal or chrome is provided, which partially covers the part of the leadthrough protruding from the lamp bulb. The gas-tight fusion between the current leadthrough and the lamp bulb is arranged in a region of the current leadthrough in which the metal is present in the composite material with less than 2%.
  • EP 0 074 507 A2 describes a material for electrical contacts, in particular Low power contacts, and a process for its manufacture.
  • the material becomes one Precious metal with 1 to 50 vol .-% glass, preferably a precious metal powder with a Particle size of ⁇ 250 ⁇ m and a glass powder with an average particle size of ⁇ 50 ⁇ m is used.
  • Gold, silver, palladium and their alloys are used as precious metals.
  • the problem is solved in that the noble metal and the SiO 2 are homogeneously distributed in the composite material, that a noble metal portion is present in the composite material in a range from ⁇ 10% by volume to ⁇ 50% by volume and that the SiO 2 layer the composite material is covered at least in the area of the connection with the SiO 2 glass bulb.
  • the SiO 2 used for the formation of the composite material should have a purity of ⁇ 97% by weight. Contamination in the SiO 2 , which can be attributed, for example, to alkalis or alkaline earths, is therefore tolerable up to approximately 3% by weight. Due to the SiO 2 layer, this current feedthrough can be fused gas-tight with the SiO 2 glass bulb over its entire length or even only in any partial area.
  • the thermal expansion coefficient which is preferably selected in the range from ⁇ 5 * 10 -6 1 / K, can be set with the proportion of noble metal in the current leadthrough. It was recognized as a particularly advantageous property of the current feedthrough that the composite material with SiO 2 and the noble metal component is easily deformable in the range from 10 10% by volume to 50 50% by volume at temperatures of greater than approximately 1200 ° C.
  • a measured current transmission capacity of 20 amperes for a rod made of composite material with a diameter of 2 mm indicates a coherent network of the noble metal component, which would normally be stiff and hardly deformable.
  • This combination of properties of the composite material, which is formed from the deformation properties of the pure quartz glass and the conductivity of the noble metal enables precise and very simple mounting of electrodes or contact pins on the current leadthrough.
  • a tungsten electrode can be attached to the end of the current feedthrough, which points in the direction of the interior of the glass bulb, by heating the electrode together with the powder mixture. Sintering into already formed composite material is also possible.
  • an electrode can also be inserted into a viscous composite material heated to approximately 1200 ° C.
  • a sufficiently conductive electrical connection is generated in a simple manner.
  • the connection of a contact pin to the current lead-through on the end facing away from the glass bulb is possible in the same way. Aligning or correcting the position and position of the electrode or the contact pin and correcting the straightness of the current feedthrough itself can also be carried out at temperatures of approximately 1200 ° C.
  • the composite material is preferably formed by heating a powder mixture of noble metal powder and SiO 2 glass powder.
  • the noble metal can also be formed by a noble metal alloy.
  • the noble metals platinum, rhodium, ruthenium, rhenium and iridium have proven to be particularly suitable for the composite material.
  • An electrical conductivity of the current feedthrough should preferably be selected in the range of> 0.01 m / ⁇ mm 2 .
  • the thickness of the SiO 2 layer should be in the range from 5 to 25 ⁇ m, but in particular in the range from 7 to 15 ⁇ m.
  • a noble metal powder which has a specific surface according to BET (Brunauer-Emmett-Teller) in the range of 0.01 to 10 m 2 / g is particularly suitable. It is also advantageous to use a precious metal powder with an average particle size (d 50 ) in the range from 3 to 30 ⁇ m.
  • the SiO 2 glass powder preferably has a BET specific surface area in the range from 10 to 100 m 2 / g.
  • An average particle size (d 50 ) for the SiO 2 glass powder in the range from 0.1 to 10 ⁇ m has proven successful. It is particularly cost-effective if there is only a noble metal content in the composite material in a range from 10% by volume to 25% by volume.
  • SiO 2 glass bulb according to the invention with a current feedthrough for high-power discharge lamps is ideal because of the high corrosion resistance, conductivity and gas tightness of the feedthrough.
  • the problem is solved for a method in that the powder mixture is heated to a maximum of 1200-1600 ° C., that after the heating, the SiO 2 layer is applied to the gas-tight composite material in the area of the connection with the SiO 2 glass bulb Current feedthrough is introduced into an opening of the SiO 2 glass bulb and is gas-tightly connected to the SiO 2 glass bulb in the region of the SiO 2 layer at a temperature> 1600 ° C.
  • the SiO 2 layer is preferably applied to the composite material in the form of a paste or a suspension by spraying or printing or dipping, the SiO 2 layer subsequently being baked onto the composite material.
  • the SiO 2 layer can also be applied to the composite material by vapor deposition, sputtering, chemical deposition or thermal spraying.
  • the problem is also solved in that the powder mixture is heated to a maximum of 1200-1600 ° C., that the gas-tight composite material at least partially after heating Temperature ⁇ 1 600 ° C is annealed in an oxygen-containing atmosphere, whereby the noble metal is oxidized and evaporated on the surface of the composite material and at least in the area of connection with the SiO 2 glass bulb of the lamp, the SiO 2 layer is generated that the current feedthrough an opening of the SiO 2 glass bulb is introduced and gas-tightly connected to the SiO 2 glass bulb in the region of the SiO 2 layer at a temperature> 1600 ° C.
  • This process uses the knowledge that the metals ruthenium, rhenium and iridium, which form volatile oxides, oxidize and evaporate on the surface when the composite material is heated to a temperature ⁇ 1600 ° C in an atmosphere containing oxygen.
  • a closed thin SiO 2 layer forms around the composite material, which prevents the metal from evaporating further and can be fused perfectly and gas-tight with the SiO 2 of the glass capsule.
  • the fusion is mechanically so stable that an atomic bond is presumably formed between the SiO 2 of the glass capsule, the SiO 2 layer produced by annealing and the SiO 2 in the composite material.
  • Air is preferably used as the atmosphere containing oxygen, but pure oxygen or other gas mixtures which have an oxygen content can also be used. It is particularly advantageous if the temperature is gradually increased to a maximum of 1200-1600 ° C. when the powder mixture is heated.
  • a method in which the powder mixture is formed before heating is inexpensive. It has proven useful to press or extrude the powder mixture before it is heated. If an unshaped powder mixture is heated, which is of course also possible, the resulting composite material must be shaped. Due to the higher strength of the composite material, this usually has to be achieved using less cost-effective machining processes.
  • a noble metal powder made of ruthenium with a BET specific surface area of 0.96 m 2 / g and an average particle size d 50 of 9.4 ⁇ m is used for the powder mixture.
  • the SiO 2 is used with a BET specific surface area of 53 m 2 / g and an average particle size d 50 of 4.4 ⁇ m.
  • 75 vol .-% SiO 2 powder and 25 vol .-% precious metal powder are mixed homogeneously with the addition of distilled water and processed into a paste. This paste is extruded into a strand with a diameter of 2.5 mm and dried in air. The dried strand is heated to 1500 ° C.
  • the cooled composite strand with a diameter of 1.9 mm is coated evenly thinly with a paste consisting only of SiO 2 with a BET specific surface area of 53 m 2 / g and an average particle size d 50 of 4.4 ⁇ m with the addition of distilled water is formed.
  • the paste is dried in air and baked on the composite strand at 1550 ° C. for 30 minutes.
  • the composite strand coated with a ⁇ 0.1 mm thick SiO 2 layer or the current feedthrough is cut to a length of 25 mm and - if appropriate after mounting an electrode and a contact pin - inserted into the tubular opening of an SiO 2 glass capsule, the tubular one Opening has an inner diameter of 2mm and an outer diameter of 5.9mm.
  • the area of the tubular opening is locally heated to approximately 1700 ° C., for example with a hydrogen flame. As a result, the tubular opening collapses onto the feedthrough and forms a gas-tight, mechanically stable bond.
  • a micrograph of the connection point from the glass capsule to the current lead-through showed no transition lines, which are formed, for example, through inhomogeneities such as pores, cracks or structural differences, between the composite material and the SiO 2 layer or between the SiO 2 layer and the glass capsule; 2 phase.
  • Example 1 a composite strand is produced, a final temperature of 1300 ° C. being maintained during the gradual heating.
  • the composite strand is annealed at 1620 ° C in air for 30 minutes. At the beginning of the annealing process, ruthenium oxide evaporates briefly. After cooling, the composite material is coated on all sides with a thin SiO 2 layer and the feedthrough can be melted into a tubular opening in the glass capsule according to Example 1.
  • a noble metal powder made of ruthenium with a BET specific surface area of 0.29 m 2 / g and an average particle size d 50 of 5.0 ⁇ m is used for the powder mixture.
  • the SiO 2 is used with a BET specific surface area of 53 m 2 / g and an average particle size d 50 of 4.4 ⁇ m.
  • 88 vol .-% SiO 2 powder and 12 vol .-% precious metal powder are mixed homogeneously with the addition of distilled water and processed into a paste. This paste is extruded into a strand with a diameter of 2.5 mm and dried in air. The dried strand is heated to 1300 ° C.
  • the composite strand is annealed at 1620 ° C in air for 30 minutes. At the beginning of the annealing process, ruthenium oxide evaporates briefly. After cooling, the composite material is coated on all sides with a thin SiO 2 layer. The current feedthrough thus produced is freed of the SiO 2 layer on the end faces and subjected to an electrical conductivity test. The result was a conductivity value of 0.047m / ⁇ mm 2 .
  • Example 2 The current feedthrough from Example 2 with a diameter of 1.9 mm was subjected to a current carrying capacity test.
  • the rod-shaped feedthrough was clamped between two copper terminals and supplied with electricity in air.
  • the current could be increased up to a value of 20 amperes, whereby the current feedthrough heated up to approximately 1700 ° C. Only an increase in the current to 22 amperes caused the feedthrough to melt. This results in a possible current density of a remarkable 7.05 A / mm 2 for the tested current implementation.
  • a noble metal powder made of ruthenium with a BET specific surface area of 0.96 m 2 / g and an average particle size d 50 of 9.4 ⁇ m is used for the powder mixture.
  • the SiO 2 is used with a BET specific surface area of 53 m 2 / g and an average particle size d 50 of 4.4 ⁇ m.
  • 75 vol .-% SiO 2 powder and 25 vol .-% precious metal powder are mixed homogeneously with the addition of distilled water and processed into a paste. This paste is extruded into a strand with a diameter of 2.5 mm and dried in air. The dried strand is heated to 1300 ° C.
  • the current feedthrough is cut to a length of 15 mm and a blind hole with a depth of 3 mm and a diameter of 1 mm is drilled in the end faces of the composite strand.
  • a tungsten wire electrode is inserted into one of the blind holes and a contact pin made of molybdenum into the other.
  • the surface of the composite strand is then coated uniformly thinly with a paste which is formed only from SiO 2 with a BET specific surface area of 53 m 2 / g and an average particle size d 50 of 4.4 ⁇ m with the addition of distilled water.
  • the paste is dried in air and baked at 1550 ° C for 30 minutes on the composite strand, which has the electrode and the contact pin.
  • a conductive, mechanically stable connection is created between the composite material and the electrode, as well as the composite material and the contact pin.
  • a noble metal powder made of ruthenium with a BET specific surface area of 0.96 m 2 / g and an average particle size d 50 of 9.4 ⁇ m is used for the powder mixture.
  • the SiO 2 is used with a BET specific surface area of 53 m 2 / g and an average particle size d 50 of 4.4 ⁇ m.
  • 75 vol .-% SiO 2 powder and 25 vol .-% precious metal powder are mixed homogeneously with the addition of distilled water and processed into a paste. This paste is extruded into a strand with a diameter of 2.5 mm and dried in air. The dried strand is heated to 1300 ° C.
  • the composite strand is cooled, cut to a length of 15 mm and then annealed at 1620 ° C. in air for 30 minutes. At the beginning of the annealing process, ruthenium oxide evaporates briefly. After cooling, the composite material is coated on all sides with a thin SiO 2 layer. The current lead-through is heated to 1500 ° C on one end and a tungsten wire electrode is pressed into the viscous composite material by about 2 mm. In the same way, the contact pin is attached to the other end of the feedthrough. A conductive, mechanically stable connection is created between the composite material and the electrode, as well as the composite material and the contact pin.
  • FIG. 1 shows a discharge lamp in the sense of the inventive solution, which has a current feedthrough 1 and an SiO 2 glass bulb in the form of a discharge vessel 2.
  • the discharge vessel 2 has a tubular section 3 in the area of the current leadthrough 1 with an opening into which the current leadthrough 1 is melted.
  • the current feedthrough 1 is formed from a composite material 1a, which is surrounded by a thin SiO 2 layer 1b.
  • the end of the current lead-through 1, which projects into the discharge space of the discharge vessel 2, has a tungsten electrode 4.
  • the end of the current lead-through 1, which protrudes from the discharge vessel 2, has a contact pin 5 made of molybdenum.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP01116803A 2000-08-04 2001-07-10 Ampoule en quartz avec au moins une traversée éléctrique, procédé pour la fabrication d'une connexion étanche aux gaz entre les deux, et son utilisation dans une lampe à décharge Expired - Lifetime EP1178519B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10038841A DE10038841C1 (de) 2000-08-04 2000-08-04 SiO¶2¶-Glaskolben mit mindestens einer Stromdurchführung, Verfahren zur Herstellung einer gasdichten Verbindung zwischen beiden sowie ihre Verwendung in einer Gasentladungslampe
DE10038841 2000-08-04

Publications (2)

Publication Number Publication Date
EP1178519A1 true EP1178519A1 (fr) 2002-02-06
EP1178519B1 EP1178519B1 (fr) 2004-02-11

Family

ID=7651832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01116803A Expired - Lifetime EP1178519B1 (fr) 2000-08-04 2001-07-10 Ampoule en quartz avec au moins une traversée éléctrique, procédé pour la fabrication d'une connexion étanche aux gaz entre les deux, et son utilisation dans une lampe à décharge

Country Status (4)

Country Link
US (1) US6525475B2 (fr)
EP (1) EP1178519B1 (fr)
JP (1) JP3523617B2 (fr)
DE (2) DE10038841C1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4613408B2 (ja) * 1999-10-15 2011-01-19 日本碍子株式会社 高圧放電灯用発光管の製造方法
AT6924U1 (de) * 2003-05-27 2004-05-25 Plansee Ag Kaltkathoden-fluoreszenzlampe mit molybdän-stromdurchführungen
DE102004015467B4 (de) * 2004-03-26 2007-12-27 W.C. Heraeus Gmbh Elektrodensystem mit einer Stromdurchführung durch ein Keramikbauteil
WO2008075273A1 (fr) * 2006-12-18 2008-06-26 Koninklijke Philips Electronics N.V. Lampe à décharge haute pression ayant une chambre de décharge en céramique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1074124A (en) * 1963-08-12 1967-06-28 Ass Elect Ind Improvements in electric devices which have a sealed envelope of vitreous or ceramic insulating refractoy material
JPH10125284A (ja) * 1996-10-18 1998-05-15 Toto Ltd 発光管の封止部構造及び封止部用キャップの製造方法
EP0930639A1 (fr) * 1997-04-11 1999-07-21 Ushio Denki Kabushiki Kaisya Joint d'ampoule

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4625848B1 (fr) * 1966-04-15 1971-07-26
NL6918746A (fr) * 1969-12-13 1971-06-15
DE3135035A1 (de) * 1981-09-04 1983-03-24 Degussa Ag, 6000 Frankfurt Werkstoff fuer elektrische kontakte und verfahren zu seiner herstellung
US5404078A (en) * 1991-08-20 1995-04-04 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh High-pressure discharge lamp and method of manufacture
JP3453955B2 (ja) 1995-10-18 2003-10-06 東陶機器株式会社 放電灯の封止部構造および封止用キャップの製造方法
JPH1040868A (ja) 1996-07-25 1998-02-13 Ushio Inc 放電ランプ
JP3736710B2 (ja) * 1997-09-08 2006-01-18 ウシオ電機株式会社 管球用電気導入体
US6169366B1 (en) * 1997-12-24 2001-01-02 Ngk Insulators, Ltd. High pressure discharge lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1074124A (en) * 1963-08-12 1967-06-28 Ass Elect Ind Improvements in electric devices which have a sealed envelope of vitreous or ceramic insulating refractoy material
JPH10125284A (ja) * 1996-10-18 1998-05-15 Toto Ltd 発光管の封止部構造及び封止部用キャップの製造方法
EP0930639A1 (fr) * 1997-04-11 1999-07-21 Ushio Denki Kabushiki Kaisya Joint d'ampoule

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31) *

Also Published As

Publication number Publication date
JP3523617B2 (ja) 2004-04-26
US20020030446A1 (en) 2002-03-14
JP2002117809A (ja) 2002-04-19
US6525475B2 (en) 2003-02-25
EP1178519B1 (fr) 2004-02-11
DE10038841C1 (de) 2001-12-20
DE50101463D1 (de) 2004-03-18

Similar Documents

Publication Publication Date Title
EP0602530B1 (fr) Procédé pour fabriquer un joint étanche au vide pour un récipient céramique et une lampe à décharge
EP1111655B1 (fr) Feuille de scellement et lampe équipée d'une telle feuille
DE3909302C2 (fr)
DE2641866A1 (de) Luftdicht verschlossenes elektrisches einzelteil
EP1794350A1 (fr) Procede de production d'un revetement resistant a l'usure et blindage correspondant pour interrupteurs a vide
DE69920373T2 (de) Stromzuführungskörper für birne und verfahren zu seiner herstellung
EP0691673B1 (fr) Conducteur électrique dans des lampes
EP1178519B1 (fr) Ampoule en quartz avec au moins une traversée éléctrique, procédé pour la fabrication d'une connexion étanche aux gaz entre les deux, et son utilisation dans une lampe à décharge
DE10241398A1 (de) Bogenentladungsröhre für Entladungsleuchte und Verfahren zur Herstellung derselben
DE1640218A1 (de) Thermistor
DE2655726C2 (fr)
DE1916292C3 (de) Verfahren zum Beschichten von Niob mit Kupfer
DE2747087C2 (de) Elektrischer Kontakt und Verfahren zu dessen Herstellung
DE2947313C2 (de) Elektronenröhrenkathode
DE10336087A1 (de) Elektrodensystem mit neuartiger Verbindung, zugehörige Lampe mit dieser Folie und Verfahren zur Herstellung der Verbindung
DE10242035A1 (de) Einschmelzfolie und zugehörige Lampe mit dieser Folie
DE4308361C2 (de) Verfahren zur Herstellung einer Verbindung zweier Keramikteile bzw. eines Metall- und eines Keramikteils
WO2007000142A1 (fr) Metal d'apport de brasage
EP1351278B1 (fr) Lampe à halogénure métallique avec enveloppe céramique
DE10257477B4 (de) Blitzlampe bildender Verbundkörper und Verfahren zum Herstellen eines eine Blitzlampe bildenden Verbundkörpers
DE1539443B2 (fr)
DE112014002069T5 (de) Keramik-Metall-Bondstruktur und Verfahren zu deren Herstellung
EP1481574A2 (fr) Element electrode pour chalumeau a plasma et procede de fabrication
DE2253439C3 (de) Ternäre Legierung für supraleitende Magneten
DE604107C (de) Luftdichte Einquetschung der Stromeinfuehrung fuer elektrische Gluehlampen und andere Gefaesse aus Quarzglas

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: 20010713

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

Kind code of ref document: A1

Designated state(s): BE DE FR GB IT NL

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid

Free format text: BE DE FR GB IT NL

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50101463

Country of ref document: DE

Date of ref document: 20040318

Kind code of ref document: P

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

Effective date: 20040414

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20041112

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

Ref country code: GB

Payment date: 20050627

Year of fee payment: 5

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

Ref country code: FR

Payment date: 20050712

Year of fee payment: 5

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: W.C. HERAEUS GMBH

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: 20060710

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

Ref country code: IT

Payment date: 20060731

Year of fee payment: 6

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

Effective date: 20060710

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070330

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: 20060731

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

Ref country code: IT

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

Effective date: 20070710

REG Reference to a national code

Ref country code: NL

Ref legal event code: TD

Effective date: 20111102

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50101463

Country of ref document: DE

Representative=s name: HANS-CHRISTIAN KUEHN, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50101463

Country of ref document: DE

Representative=s name: KUEHN, HANS-CHRISTIAN, DE

Effective date: 20111219

Ref country code: DE

Ref legal event code: R081

Ref document number: 50101463

Country of ref document: DE

Owner name: HERAEUS MATERIALS TECHNOLOGY GMBH & CO. KG, DE

Free format text: FORMER OWNER: W.C. HERAEUS GMBH, 63450 HANAU, DE

Effective date: 20111219

BECN Be: change of holder's name

Owner name: HERAEUS MATERIALS TECHNOLOGY G.M.B.H. & CO. K.G.

Effective date: 20120210

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

Ref country code: DE

Payment date: 20120720

Year of fee payment: 12

Ref country code: BE

Payment date: 20120720

Year of fee payment: 12

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

Ref country code: NL

Payment date: 20120719

Year of fee payment: 12

BERE Be: lapsed

Owner name: HERAEUS MATERIALS TECHNOLOGY G.M.B.H. & CO. K.G.

Effective date: 20130731

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20140201

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50101463

Country of ref document: DE

Effective date: 20140201

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

Ref country code: BE

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

Effective date: 20130731

Ref country code: NL

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

Effective date: 20140201

Ref country code: DE

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

Effective date: 20140201