US20040099345A1 - Component which is intended for a facility for producing or preparing glass melts - Google Patents

Component which is intended for a facility for producing or preparing glass melts Download PDF

Info

Publication number
US20040099345A1
US20040099345A1 US10/354,407 US35440703A US2004099345A1 US 20040099345 A1 US20040099345 A1 US 20040099345A1 US 35440703 A US35440703 A US 35440703A US 2004099345 A1 US2004099345 A1 US 2004099345A1
Authority
US
United States
Prior art keywords
component
temperature
during
glass melts
treatment
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.)
Abandoned
Application number
US10/354,407
Inventor
Erhard Dick
Erich Fischer
Roland Fuchs
Markus Riedl
Michael Oechsle
Gerhard Reber
Thomas Udo
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.)
Schott AG
Umicore AG and Co KG
Original Assignee
OMG AG&KG
Umicore AG and Co KG
Schott Glaswerke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by OMG AG&KG, Umicore AG and Co KG, Schott Glaswerke AG filed Critical OMG AG&KG
Assigned to OMG AG&KG, SCHOTT GLAS reassignment OMG AG&KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DICK, ERHARD, FISCHER, ERICH, FUCHS, ROLAND, OECHSLE, MICHAEL, REBER, GERHARD, RIEDL, MARKUS, UDO, THOMAS
Assigned to UMICORE AG & CO. KG reassignment UMICORE AG & CO. KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: OMG AG & CO. KG
Publication of US20040099345A1 publication Critical patent/US20040099345A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
    • C03B5/1672—Use of materials therefor
    • C03B5/1675—Platinum group metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/425—Preventing corrosion or erosion
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/43—Use of materials for furnace walls, e.g. fire-bricks
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising

Definitions

  • the present invention relates to the field of production or preparation of glass melts.
  • Glass melts are produced from inorganic compounds, particularly from glass shards or glass batches.
  • the melting process must typically be followed by a refining process.
  • the refining has the task of freeing the molten glass from physically and chemically bonded gases.
  • the present invention is based on the object of treating components of the type described in such a way that bubble formation is avoided or suppressed so that the necessary quality requirements are fulfilled.
  • the component is subjected for a certain period of time to an elevated temperature, i.e., a temperature above room temperature, possibly also over the operating temperature, in an oxidizing atmosphere, before it is put into operation in the facility cited for producing or preparing glass melts.
  • an elevated temperature i.e., a temperature above room temperature, possibly also over the operating temperature, in an oxidizing atmosphere, before it is put into operation in the facility cited for producing or preparing glass melts.
  • organic impurities are decomposed through the treatment cited.
  • Oxidic impurities vaporize through the high decomposition pressure or form stable layers. These layers have a low diffusion tendency in relation to hydrogen, compared to pure metals. However, if no hydrogen can diffuse into the layer, then also no oxygen, which leads to the formation of the secondary bubbles cited, is left behind. This means that the formation of bubbles in the glass melt is strongly reduced through the application of the present invention and that high-quality glasses may be produced.
  • component includes those components which could be a part of a facility for producing or preparing glass melts. Therefore, pipes, pipe elbows, containers, stirrers, and other things are in consideration. In this case, the entire component does not have to be made of noble metal, there are numerous cases in which the relevant component is only partially coated using noble metal, the noble metal surfaces being in contact with glass melts during operation.
  • Bubble type I organic impurities of the surface (CO, CO 2 ) observation time period: several days
  • Bubble type II leakage of the lining (noble gases, O 2 , . . . ) observation time period: continuous
  • Bubble type III impurities (oxides) in the noble metal (O 2 ) observation time period: several days to weeks
  • Bubble type IV bonded hydroxyl groups in the glass (O 2 ) observation time period: continuous
  • the components, the semifinished product, or the coatings are treated, at a temperature which lies around 100 K above the application temperature, for 400 hours in a forced-air furnace.
  • the present invention contributes to increasing the quality of high-quality glasses.
  • Laboratory crucibles (size 106) were produced from the alloys Pt(3N), PtRh10, FGS [fine-grain stabilized] 16Pt, FGS 16PtRh10 und FGS 16PtAu5 in laboratory scale.
  • Each crucible was treated for 400 hours at 1200° C. and at 1450° C. in a standard forced-air furnace.
  • the crucibles were filled in the cold state with borosilicate glass shards.
  • the glass test was performed by heating to operating temperature, a holding time of 24 hours, and cooling in the heat of the furnace.
  • Zircon mullite rod samples were coated with a layer thickness of 200 ⁇ m to 1500 ⁇ m through thermal spraying.
  • the rod samples were introduced at operating temperature into a crucible filled with borosilicate glass shards.
  • the glass test was performed by introducing the samples into the glass melt at the operating temperature, a holding time of 24 hours, and the cooling in the furnace heat.
  • the temperature may be changed during the treatment.
  • it may be very high during a starting phase of the treatment period and then be reduced, or, vice versa, be low during a starting phase and increase in the course of the treatment period.
  • the inventors suggest a device according to the present invention.
  • This includes a chamber which is intended for receiving the components to be treated.
  • the chamber may be appropriately heated.
  • the chamber has a connection for introducing an oxidizing gas.

Abstract

The present invention relates to a method of treating a component which is intended for a facility for producing or preparing glass melts and has surfaces which are made of noble metal and come into contact with glass melts during operation.
The present invention is characterized by the following feature: the component is subjected to an oxidizing atmosphere for a certain period of time before being put into operation.

Description

  • The present invention relates to the field of production or preparation of glass melts. [0001]
  • Glass melts are produced from inorganic compounds, particularly from glass shards or glass batches. [0002]
  • Numerous devices have become known, using which the materials cited may be melted or refined. For example, see German Patent 33 16 546 C1. This refers to a skull crucible. [0003]
  • The melting process must typically be followed by a refining process. In this case, the refining has the task of freeing the molten glass from physically and chemically bonded gases. [0004]
  • In this case, every effort is made to perform the degassing as completely as possible. Therefore, refining agents are used during the refining process and particularly high temperatures of up to 2000° C. are applied. [0005]
  • In practice, it has been shown that in spite of great efforts in the refining stage, bubbles arise in the glass melt. As is known, this originates from localized temperature gradients existing in the melt, which lead to the formation of local elements and therefore to the occurrence of further gas bubbles, which are referred to as “secondary bubbles”. See European Patent Application 1 050 513 A3. [0006]
  • Further publications which deal with the phenomenon of bubble formation are the following: [0007]
  • Cowan J. H, Platinum Glass Reactions, Ceramic Proceedings 1982, pp. 218-228 [0008]
  • Cowan J. H., An Electrochemical Theory for Oxygen Reboil, Journal of the American Ceramic Society 1966, pp. 559-562 [0009]
  • Onishi, Reboil Phenomenon at the borosilicate-glass-platinum-interface, 10. Int. Congress on Glass, Kyoto 1974, pp. 63-70 [0010]
  • Shinji, Kawachi; Yoshio, Iwatsubo, Diagnosis and Treatment of Bubbles, Glass 2000, pp. 122-129 [0011]
  • German Patent Application 198 56 797 A1 [0012]
  • Japanese Patent 2982959 [0013]
  • U.S. Pat. No. 3,387,961 [0014]
  • U.S. Pat. No. 5,385,595 [0015]
  • U.S. Pat. No. 4,123,263 [0016]
  • WO 0818731 [0017]
  • European Patent 559330 [0018]
  • Japanese Patent 56129618 [0019]
  • European Patent 967179 [0020]
  • European Patent 908417 [0021]
  • Japanese Patent 02221129 [0022]
  • It is known that bubble formation occurs at the surface of platinum in contact with borosilicate glass (Onishi, Fujij 1974). Furthermore, it is known that the process is based on electrochemical mechanisms (U.S. Pat. No. 427,934 [sic] and Cowan, Buehl, et al. 1966). [0023]
  • NH Technoglass describes the use of platinum having slight osmium impurities to avoid bubbles, aging is not shown (German Patent 198 56 797 and/or Japanese Patent 2,982,959). Criticisms of the related art: the theories and embodiments described, however, only show the phenomenon; a solution through suitable selection of alloy is not indicated. In this case, bubble formation is not acceptable in those melts from which optical glasses, LCD glasses, and technical glasses are to be produced. The necessary quality criteria are not achieved in this way. [0024]
  • The present invention is based on the object of treating components of the type described in such a way that bubble formation is avoided or suppressed so that the necessary quality requirements are fulfilled. [0025]
  • This object is achieved by the features of claim [0026] 1. According to this, the component is subjected for a certain period of time to an elevated temperature, i.e., a temperature above room temperature, possibly also over the operating temperature, in an oxidizing atmosphere, before it is put into operation in the facility cited for producing or preparing glass melts.
  • The inventors have recognized the following: organic impurities are decomposed through the treatment cited. Oxidic impurities vaporize through the high decomposition pressure or form stable layers. These layers have a low diffusion tendency in relation to hydrogen, compared to pure metals. However, if no hydrogen can diffuse into the layer, then also no oxygen, which leads to the formation of the secondary bubbles cited, is left behind. This means that the formation of bubbles in the glass melt is strongly reduced through the application of the present invention and that high-quality glasses may be produced. [0027]
  • The concept of “component” includes those components which could be a part of a facility for producing or preparing glass melts. Therefore, pipes, pipe elbows, containers, stirrers, and other things are in consideration. In this case, the entire component does not have to be made of noble metal, there are numerous cases in which the relevant component is only partially coated using noble metal, the noble metal surfaces being in contact with glass melts during operation. [0028]
  • For lining materials made of platinum and its alloys, four types of bubbles in the glass may be differentiated in principle: [0029]
    Bubble type I: organic impurities of the surface (CO, CO2)
    observation time period: several days
    Bubble type II: leakage of the lining (noble gases, O2, . . . )
    observation time period: continuous
    Bubble type III: impurities (oxides) in the noble metal (O2)
    observation time period: several days to weeks
    Bubble type IV: bonded hydroxyl groups in the glass (O2)
    observation time period: continuous
  • The treatment of components, semifinished products, or coatings made of platinum and its alloys represents a possibility for avoiding bubble types I and III in a glass melting furnace. [0030]
  • In this case, the components, the semifinished product, or the coatings are treated, at a temperature which lies around 100 K above the application temperature, for 400 hours in a forced-air furnace. [0031]
  • The advantages achieved using the present invention are particularly that the production with reduced bubbles may be begun immediately after the installation of the components. [0032]
  • Furthermore, the present invention contributes to increasing the quality of high-quality glasses.[0033]
    • EXEMPLARY EMBODIMENTS Example 1
  • Laboratory crucibles (size 106) were produced from the alloys Pt(3N), PtRh10, FGS [fine-grain stabilized] 16Pt, FGS 16PtRh10 und FGS 16PtAu5 in laboratory scale. [0034]
  • Each crucible was treated for 400 hours at 1200° C. and at 1450° C. in a standard forced-air furnace. [0035]
  • The crucibles were filled in the cold state with borosilicate glass shards. The glass test was performed by heating to operating temperature, a holding time of 24 hours, and cooling in the heat of the furnace. [0036]
  • While the samples treated at 1200° C. had definite bubbles, no bubble formation could be detected in the samples annealed at 1450° C. [0037]
    • Example 2
  • Zircon mullite rod samples were coated with a layer thickness of 200 μm to 1500 μm through thermal spraying. [0038]
  • One sample of each layer thickness was treated for 400 hours at 1200° C. and at 1450° C. in a standard forced-air furnace. [0039]
  • The rod samples were introduced at operating temperature into a crucible filled with borosilicate glass shards. The glass test was performed by introducing the samples into the glass melt at the operating temperature, a holding time of 24 hours, and the cooling in the furnace heat. [0040]
  • While the samples treated at 1200° C. had definite bubbles, no bubble formation could be detected in the samples annealed at 1450° C. [0041]
  • Further variants of the method according to the present invention are conceivable. Thus, the temperature may be changed during the treatment. [0042]
  • For example, it may be very high during a starting phase of the treatment period and then be reduced, or, vice versa, be low during a starting phase and increase in the course of the treatment period. [0043]
  • It is also possible to apply a flow of oxidizing gas to the component during treatment. This gas flow may be directed in a targeted way onto specific parts, which come into contact with glass melts during operation. [0044]
  • In accordance with the method according to the present invention, the inventors suggest a device according to the present invention. This includes a chamber which is intended for receiving the components to be treated. The chamber may be appropriately heated. In addition, the chamber has a connection for introducing an oxidizing gas. [0045]

Claims (13)

What is claimed is:
1. A method of treating a component, which is intended for a facility for producing or preparing glass melts and has surfaces which are made of noble metal and come into contact with glass melts during operation, characterized by the following feature:
1.1 the component is subjected to an oxidizing atmosphere for a certain period of time before being put into operation.
2. The method according to claim 1,
characterized in that the component is subjected to an elevated temperature during the time period cited.
3. The method according to claim 2,
characterized in that the temperature lies above the operating temperature of the component.
4. The method according to claim 3,
characterized in that the temperature lies between 1000° C. and 2000° C.
5. The method according to claim 4,
characterized in that the temperature lies between 1100° C. and 1500° C.
6. The method according to one of claims 1 to 5,
characterized in that the time span lies between 1 and 500 hours.
7. The method according to claim 6,
characterized in that the time span lies between 100 and 500 hours.
8. The method according to one of claims 1 to 7,
characterized in that the temperature is changed during the treatment of the component.
9. The method according to claim 8,
characterized in that the temperature is high during a first treatment phase and is low during a second treatment phase, or the temperature is low during a first treatment phase and is high during a second treatment phase.
10. The method according to one of claims 1 to 9,
characterized in that an oxidizing gas is applied to the component during at least a part of the treatment period.
11. A device for treating a component, which is intended for a facility for producing or preparing glass melts and has surfaces which are made of noble metal and come into contact with glass melts during operation, characterized by a treatment chamber which receives the component and in which an elevated temperature may be set.
12. The device according to claim 11,
characterized in that the temperature in the chamber may be set to a value which lies above room temperature or above the operating temperature.
13. The device according to claim 11 or 12,
characterized in that the chamber has an inlet for applying an oxidizing gas.
US10/354,407 2002-01-30 2003-01-30 Component which is intended for a facility for producing or preparing glass melts Abandoned US20040099345A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10203660.8 2002-01-30
DE10203660A DE10203660A1 (en) 2002-01-30 2002-01-30 Component intended for a plant for the production or processing of glass melts

Publications (1)

Publication Number Publication Date
US20040099345A1 true US20040099345A1 (en) 2004-05-27

Family

ID=7713423

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/354,407 Abandoned US20040099345A1 (en) 2002-01-30 2003-01-30 Component which is intended for a facility for producing or preparing glass melts

Country Status (4)

Country Link
US (1) US20040099345A1 (en)
EP (1) EP1333010A3 (en)
JP (1) JP2003221238A (en)
DE (1) DE10203660A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI388519B (en) * 2008-11-24 2013-03-11 Corning Inc Isopipe material outgassing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US762654A (en) * 1902-08-04 1904-06-14 American Gas Furnace Co Method of annealing and tempering forms of metal.
US3622310A (en) * 1968-01-20 1971-11-23 Degussa Process of preparing noble metal materials having improved high temperature strength properties
US3640705A (en) * 1965-01-15 1972-02-08 Johnson Matthey Co Ltd Treatment of platinum group metals and alloys
US6129997A (en) * 1998-03-28 2000-10-10 W. C. Heraeus Gmbh & Co. Kg Method for manufacturing a welded shaped body dispersion-hardened platinum material
US6663728B2 (en) * 2000-09-18 2003-12-16 W.C. Heraeus Gmbh & Co. Kg Gold-free platinum material dispersion-strengthened by small, finely dispersed particles of base metal oxide

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387961A (en) * 1965-01-25 1968-06-11 Corning Glass Works Method of reducing reboil in molten glass
US4123263A (en) * 1977-11-02 1978-10-31 Owens-Corning Fiberglas Corporation Platinum-rhodium alloys
DE3316546C1 (en) * 1983-05-06 1984-04-26 Philips Patentverwaltung Gmbh, 2000 Hamburg Cold crucible for melting and crystallizing non-metallic inorganic compounds
GB9203394D0 (en) * 1992-02-18 1992-04-01 Johnson Matthey Plc Coated article
US5385595A (en) * 1993-12-23 1995-01-31 Owens-Corning Fiberglas Technology Inc. Titanium nitride diffusion barrier for platinum-coated fiberglass spinner bores
DE19758724C2 (en) * 1997-04-08 2002-12-12 Heraeus Gmbh W C Dispersion-strengthened platinum-gold material, process for its production and its use
US6119484A (en) * 1997-10-06 2000-09-19 Asahi Glass Company Ltd. Vacuum degassing apparatus for molten glass
TW432020B (en) * 1998-04-27 2001-05-01 Nh Technoglass Co Lining material for glass melting furnace, glass melting furnace, production of glass product and purification of lining material for glass melting furnace
JP3823544B2 (en) * 1998-06-24 2006-09-20 旭硝子株式会社 Vacuum degassing apparatus for molten glass and manufacturing method thereof
DE19921289A1 (en) * 1999-05-07 2000-11-16 Schott Rohrglas Gmbh Channel system for guiding glass melts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US762654A (en) * 1902-08-04 1904-06-14 American Gas Furnace Co Method of annealing and tempering forms of metal.
US3640705A (en) * 1965-01-15 1972-02-08 Johnson Matthey Co Ltd Treatment of platinum group metals and alloys
US3622310A (en) * 1968-01-20 1971-11-23 Degussa Process of preparing noble metal materials having improved high temperature strength properties
US6129997A (en) * 1998-03-28 2000-10-10 W. C. Heraeus Gmbh & Co. Kg Method for manufacturing a welded shaped body dispersion-hardened platinum material
US6663728B2 (en) * 2000-09-18 2003-12-16 W.C. Heraeus Gmbh & Co. Kg Gold-free platinum material dispersion-strengthened by small, finely dispersed particles of base metal oxide

Also Published As

Publication number Publication date
EP1333010A3 (en) 2004-08-04
EP1333010A2 (en) 2003-08-06
DE10203660A1 (en) 2003-08-07
JP2003221238A (en) 2003-08-05

Similar Documents

Publication Publication Date Title
KR101474957B1 (en) Device for producing glass
US7032412B2 (en) Methods of manufacturing glass sheets with reduced blisters
US7628037B2 (en) Method for preventing bubbles on precious metal components
JP4927027B2 (en) Apparatus and method for producing high melting point glass material or high melting point glass ceramic material
JP2017100941A (en) Glass clarification method and system
JPH02221129A (en) Production of glass
TWI406823B (en) Methods and apparatus for manufacturing glass sheet
JP2001294428A (en) Oxygen refining method for glassmelt with oxygen and its device
US20040099345A1 (en) Component which is intended for a facility for producing or preparing glass melts
JP2021505507A (en) Equipment and methods for manufacturing glass
US4795490A (en) Inert gas purging during shaft furnace shut down
JP2002145625A (en) Apparatus and method of introducing gas into heating medium
DE10138108A1 (en) Process for reducing bubble formation during homogenizing, conditioning or molding of glass melts comprises increasing the oxygen absorption by redox reactions and decreasing the water content of the melt
MOORE et al. Investigation of Gases Evolved During Firing of Porcelain Enamels
JPH0123422B2 (en)
KR20200085097A (en) Glass refinement device
NO845144L (en) PROCEDURE FOR APPLYING BARRIER COATS ON METALS AND THE RESULTING PRODUCT
Rozenenkova et al. Glass Ceramic Protective Coatings for Gasostatic Treatment of Heat-Resistant Nickel Alloys
KR101556759B1 (en) Side seal for float bath and thereof method
KR20200043049A (en) Apparatus for manufacturing glass
Biedron et al. The Diffusional Porosity of Extruded Half-Products of Al-- Cu-- Mg Alloys
KR20070103345A (en) Filler for ladle receiving molten steel
KR20190092116A (en) Apparatus for manufacturing glass

Legal Events

Date Code Title Description
AS Assignment

Owner name: OMG AG&KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DICK, ERHARD;FISCHER, ERICH;FUCHS, ROLAND;AND OTHERS;REEL/FRAME:014156/0893

Effective date: 20030604

Owner name: SCHOTT GLAS, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DICK, ERHARD;FISCHER, ERICH;FUCHS, ROLAND;AND OTHERS;REEL/FRAME:014156/0893

Effective date: 20030604

AS Assignment

Owner name: UMICORE AG & CO. KG, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:OMG AG & CO. KG;REEL/FRAME:014976/0401

Effective date: 20030827

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION