DE2518056C3 - Verfahren zur Herstellung eines stabförmigen Formkörpers - Google Patents

Verfahren zur Herstellung eines stabförmigen Formkörpers

Info

Publication number
DE2518056C3
DE2518056C3 DE2518056A DE2518056A DE2518056C3 DE 2518056 C3 DE2518056 C3 DE 2518056C3 DE 2518056 A DE2518056 A DE 2518056A DE 2518056 A DE2518056 A DE 2518056A DE 2518056 C3 DE2518056 C3 DE 2518056C3
Authority
DE
Germany
Prior art keywords
glass
gas
substrate
rod
sio
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.)
Expired
Application number
DE2518056A
Other languages
German (de)
English (en)
Other versions
DE2518056B2 (de
DE2518056A1 (de
Inventor
Tasuo Musashino Tokio Izawa
Soichi Mito Kobayashi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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
Priority claimed from JP4547174A external-priority patent/JPS5431815B2/ja
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of DE2518056A1 publication Critical patent/DE2518056A1/de
Publication of DE2518056B2 publication Critical patent/DE2518056B2/de
Application granted granted Critical
Publication of DE2518056C3 publication Critical patent/DE2518056C3/de
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01413—Reactant delivery systems
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01413—Reactant delivery systems
    • C03B37/0142—Reactant deposition burners
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/0148—Means for heating preforms during or immediately prior to deposition
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
    • C03C13/045—Silica-containing oxide glass compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2207/00—Glass deposition burners
    • C03B2207/80—Feeding the burner or the burner-heated deposition site
    • C03B2207/81—Constructional details of the feed line, e.g. heating, insulation, material, manifolds, filters
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2207/00—Glass deposition burners
    • C03B2207/80—Feeding the burner or the burner-heated deposition site
    • C03B2207/85—Feeding the burner or the burner-heated deposition site with vapour generated from liquid glass precursors, e.g. directly by heating the liquid
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2207/00—Glass deposition burners
    • C03B2207/80—Feeding the burner or the burner-heated deposition site
    • C03B2207/85—Feeding the burner or the burner-heated deposition site with vapour generated from liquid glass precursors, e.g. directly by heating the liquid
    • C03B2207/87—Controlling the temperature
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/31—Doped silica-based glasses containing metals containing germanium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/32—Doped silica-based glasses containing metals containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/40—Doped silica-based glasses containing metals containing transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn
    • C03C2201/42—Doped silica-based glasses containing metals containing transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn containing titanium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2203/00—Production processes
    • C03C2203/40—Gas-phase processes
    • C03C2203/42—Gas-phase processes using silicon halides as starting materials
    • C03C2203/44—Gas-phase processes using silicon halides as starting materials chlorine containing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Glass Compositions (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Glass Melting And Manufacturing (AREA)
DE2518056A 1974-04-24 1975-04-23 Verfahren zur Herstellung eines stabförmigen Formkörpers Expired DE2518056C3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4547174A JPS5431815B2 ( ) 1974-04-24 1974-04-24
JP4858674A JPS5343407B2 ( ) 1974-04-24 1974-04-30

Publications (3)

Publication Number Publication Date
DE2518056A1 DE2518056A1 (de) 1975-10-30
DE2518056B2 DE2518056B2 (de) 1978-05-11
DE2518056C3 true DE2518056C3 (de) 1980-05-08

Family

ID=26385467

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2518056A Expired DE2518056C3 (de) 1974-04-24 1975-04-23 Verfahren zur Herstellung eines stabförmigen Formkörpers

Country Status (6)

Country Link
US (1) US3957474A ( )
JP (1) JPS5343407B2 ( )
DE (1) DE2518056C3 ( )
FR (1) FR2269089B1 ( )
GB (1) GB1498907A ( )
NL (2) NL165134C ( )

Families Citing this family (69)

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US4161505A (en) * 1972-11-25 1979-07-17 Sumitomo Electric Industries, Ltd. Process for producing optical transmission fiber
DE2444100C3 (de) * 1974-09-14 1979-04-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur Herstellung von innenbeschichteten Glasrohren zum Ziehen von Lichtleitfasern
US4145456A (en) * 1974-09-14 1979-03-20 Dieter Kuppers Method of producing internally coated glass tubes for the drawing of fibre optic light conductors
US4135901A (en) * 1974-12-18 1979-01-23 Sumitomo Electric Industries, Ltd. Method of manufacturing glass for optical waveguide
US4040890A (en) * 1975-06-27 1977-08-09 Bell Telephone Laboratories, Incorporated Neodymium oxide doped yttrium aluminum garnet optical fiber
US4038062A (en) * 1976-03-25 1977-07-26 Bell Telephone Laboratories, Incorporated Method and apparatus for introducing geometrical perturbations in optical fiber waveguides
JPS52121341A (en) * 1976-04-06 1977-10-12 Nippon Telegr & Teleph Corp <Ntt> Production of optical fiber base materials and production apparatus fo r the same
US4202682A (en) * 1976-05-07 1980-05-13 International Standard Electric Corporation Glass manufacture
US4114980A (en) * 1976-05-10 1978-09-19 International Telephone And Telegraph Corporation Low loss multilayer optical fiber
US4198223A (en) * 1977-05-17 1980-04-15 International Telephone And Telegraph Corporation Continuous fiber fabrication process
US4253863A (en) * 1977-06-07 1981-03-03 International Telephone And Telegraph Corporation Apparatus for mass producing fiber optic preforms and optic fibers
US4276072A (en) * 1977-06-07 1981-06-30 International Telephone And Telegraph Corporation Optical fiber fabrication
US4204851A (en) * 1977-06-23 1980-05-27 Corning Glass Works Directing glass forming constituents against a lateral surface parallel to the axis of rotation of a starting member to form a monolithic blank for an optical waveguide
US4203553A (en) * 1977-06-27 1980-05-20 Corning Glass Works Ribbon burner
JPS5927728B2 (ja) * 1977-08-11 1984-07-07 日本電信電話株式会社 煤状ガラスロッドの製造方法
US4204850A (en) * 1977-08-26 1980-05-27 Corning Glass Works Carbon coating for a starting member used in producing optical waveguide
US4358181A (en) * 1977-09-29 1982-11-09 Corning Glass Works Gradient index optical waveguide and method of making
IT1091498B (it) * 1977-11-25 1985-07-06 Cselt Centro Studi Lab Telecom Procedimento ed apparecchiatura per la produzione continua di fibre ottiche
JPS54116429A (en) * 1978-03-03 1979-09-10 Hitachi Ltd Production of material for optical fiber
US4231774A (en) * 1978-04-10 1980-11-04 International Telephone And Telegraph Corporation Method of fabricating large optical preforms
US4188201A (en) * 1978-04-17 1980-02-12 Lothar Jung Apparatus for forming an ingot in a rotating housing
FR2447890B1 (fr) * 1979-02-05 1985-06-28 Lyonnaise Transmiss Optiques Procede de fabrication de preformes de fibres optiques a gradient d'indice, et dispositif de mise en oeuvre de ce procede
US4212661A (en) * 1979-02-16 1980-07-15 Lothar Jung Method for the manufacture of hollow fused quartz or fused silica ingots
US4230472A (en) * 1979-02-22 1980-10-28 Corning Glass Works Method of forming a substantially continuous optical waveguide
GB2052566B (en) * 1979-03-30 1982-12-15 Rolls Royce Laser aplication of hard surface alloy
US4294601A (en) * 1979-07-13 1981-10-13 Times Fiber Communications, Inc. Apparatus and process for automatic control of the production of optical fiber
BR7908672A (pt) * 1979-11-30 1981-06-30 Brasilia Telecom Processo de posicao de filmes a partir da fase vapor
US4302230A (en) * 1980-04-25 1981-11-24 Bell Telephone Laboratories, Incorporated High rate optical fiber fabrication process using thermophoretically enhanced particle deposition
US4340617A (en) * 1980-05-19 1982-07-20 Massachusetts Institute Of Technology Method and apparatus for depositing a material on a surface
US4579750A (en) * 1980-07-07 1986-04-01 Massachusetts Institute Of Technology Laser heated CVD process
JPS57100933A (en) * 1980-12-12 1982-06-23 Nippon Telegr & Teleph Corp <Ntt> Preparation of base material for optical fiber
JPS57100934A (en) * 1980-12-12 1982-06-23 Nippon Telegr & Teleph Corp <Ntt> Manufacturing of optical fiber preform
AU535343B2 (en) * 1981-02-27 1984-03-15 Associated Electrical Industries Limited Manufacture of optical fibre preform
US4417911A (en) * 1981-02-27 1983-11-29 Associated Electrical Industries Limited Manufacture of optical fibre preforms
JPS57163204A (en) * 1981-04-02 1982-10-07 Nec Corp Production of optical waveguide on glass substrate
US4378985A (en) * 1981-06-04 1983-04-05 Corning Glass Works Method and apparatus for forming an optical waveguide fiber
NL8103647A (nl) * 1981-08-03 1983-03-01 Philips Nv Werkwijze voor de continue vervaardiging van een optische fiber onder neerslaan van glaslagen op een doorn.
NL8103648A (nl) * 1981-08-03 1983-03-01 Philips Nv Werkwijze voor de vervaardiging van voorvormen voor het trekken van optische vezels en voorvormen volgens deze werkwijze verkregen en inrichting voor het continu vervaardigen van optische vezels.
US4421721A (en) * 1981-10-02 1983-12-20 The Board Of Trustees Of The Leland Stanford Junior University Apparatus for growing crystal fibers
DE3206178A1 (de) * 1982-02-20 1983-08-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur herstellung einer vorform, aus der optische fasern ziehbar sind
EP0110882A1 (en) * 1982-06-01 1984-06-20 Massachusetts Institute Of Technology Maskless growth of patterned films
US4615904A (en) * 1982-06-01 1986-10-07 Massachusetts Institute Of Technology Maskless growth of patterned films
US4440558A (en) * 1982-06-14 1984-04-03 International Telephone And Telegraph Corporation Fabrication of optical preforms by axial chemical vapor deposition
US4507135A (en) * 1982-08-02 1985-03-26 Corning Glass Works Method of making optical fiber preform
US4726827A (en) * 1982-09-29 1988-02-23 Corning Glass Works Method and apparatus for producing an optical fiber preform
US4639079A (en) * 1982-09-29 1987-01-27 Corning Glass Works Optical fiber preform and method
US4568370A (en) * 1982-09-29 1986-02-04 Corning Glass Works Optical fiber preform and method
JPS59169949A (ja) * 1983-03-14 1984-09-26 Matsushita Electric Ind Co Ltd 光フアイバの製造方法
GB2131417B (en) * 1982-12-02 1987-04-08 Western Electric Co Ltd Optical device and preform fabrication
DE3300449A1 (de) * 1983-01-08 1984-07-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur herstellung einer elektrode fuer eine hochdruckgasentladungslampe
US4542580A (en) * 1983-02-14 1985-09-24 Prime Computer, Inc. Method of fabricating n-type silicon regions and associated contacts
JPS60186429A (ja) * 1984-03-01 1985-09-21 Sumitomo Electric Ind Ltd 光フアイバ用母材の製造方法
JPS6126532A (ja) * 1984-07-13 1986-02-05 Sumitomo Electric Ind Ltd 光フアイバ−用母材の製造方法
US4664473A (en) * 1985-04-01 1987-05-12 Corning Glass Works Optical fiber formed of MgO--Al2 O3 --SiO2 glass
IT1184068B (it) * 1985-04-10 1987-10-22 Cselt Centro Studi Lab Telecom Procedimento per la produzione di fibre ottiche in silice drogata con allumina utilizzante reagenti metallorganici
US4863501A (en) * 1985-09-26 1989-09-05 Polaroid Corporation, Patent Department Method of employing plasma for finishing start rods
US4684384A (en) * 1986-02-27 1987-08-04 Corning Glass Works Conveyor deposition method and apparatus for making optical fiber preforms
JPH02500758A (ja) * 1986-08-18 1990-03-15 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー レーザー助成繊維成長
US4818562A (en) * 1987-03-04 1989-04-04 Westinghouse Electric Corp. Casting shapes
US5114738A (en) * 1990-07-20 1992-05-19 The United States Of America As Represented By The Secretary Of The Army Direct optical fiber glass formation techniques using chemically and/or physically removable filamentary substrates
US6474107B1 (en) * 1996-12-02 2002-11-05 Franklin W. Dabby Fluorinating an optical fiber preform in a pure aluminum oxide muffle tube
US6723435B1 (en) * 2001-08-28 2004-04-20 Nanogram Corporation Optical fiber preforms
US6960537B2 (en) * 2001-10-02 2005-11-01 Asm America, Inc. Incorporation of nitrogen into high k dielectric film
JP2003171137A (ja) * 2001-11-30 2003-06-17 Fujikura Ltd 光ファイバ母材の製造方法
FR2909298B1 (fr) * 2006-12-02 2009-07-10 Technogenia Soc Par Actions Si Piece concave rechargee par laser, procede et dispositif pour sa realisation
US8065893B2 (en) * 2009-07-10 2011-11-29 Dau Wu Process, apparatus, and material for making silicon germanium core fiber
DE102011122510A1 (de) * 2011-12-29 2013-07-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Beschichtung von optischen Wellenleitern
US20150225845A1 (en) * 2014-02-12 2015-08-13 Electronics And Telecommunications Research Institute Method for forming metal oxide thin film and device for printing metal oxide thin film
EP4015467A1 (de) * 2020-12-16 2022-06-22 Heraeus Quarzglas GmbH & Co. KG Verfahren zur herstellung von synthetischem quarzglas

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DE1471446C3 (de) * 1964-08-19 1975-03-06 Siemens Ag, 1000 Berlin U. 8000 Muenchen Verfahren zur Herstellung von aus Aluminiumoxid bestehenden Einkristallen
US3892540A (en) * 1965-10-05 1975-07-01 Ugine Kuhlmann Producing monocrystalline bodies by the verneuil method
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DE1900116C3 (de) * 1969-01-02 1978-10-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zum Herstellen hxxochreiner, aus Silicium bestehender einkristalliner Schichten
GB1313106A (en) * 1969-10-14 1973-04-11 Pilkington Brothers Ltd Manufacture of clad glass
US3826560A (en) * 1972-03-30 1974-07-30 Corning Glass Works Method of forming a light focusing fiber waveguide
US3823995A (en) * 1972-03-30 1974-07-16 Corning Glass Works Method of forming light focusing fiber waveguide
US3864113A (en) * 1973-10-19 1975-02-04 Corning Glass Works Method of Producing Glass by Flame Hydrolysis
JPS5429263B2 ( ) * 1974-01-14 1979-09-21

Also Published As

Publication number Publication date
GB1498907A (en) 1978-01-25
JPS50141334A ( ) 1975-11-13
NL7504872A (nl) 1975-10-28
FR2269089B1 ( ) 1982-07-16
NL165134C (nl) 1981-03-16
US3957474A (en) 1976-05-18
NL165134B (nl) 1980-10-15
DE2518056B2 (de) 1978-05-11
DE2518056A1 (de) 1975-10-30
FR2269089A1 ( ) 1975-11-21
JPS5343407B2 ( ) 1978-11-20

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
8327 Change in the person/name/address of the patent owner

Owner name: NIPPON TELEGRAPH AND TELEPHONE CORP., TOKIO/TOKYO,

8328 Change in the person/name/address of the agent

Free format text: EITLE, W., DIPL.-ING. HOFFMANN, K., DIPL.-ING. DR.RER.NAT. LEHN, W., DIPL.-ING. FUECHSLE, K., DIPL.-ING. HANSEN, B., DIPL.-CHEM. DR.RER.NAT. BRAUNS, H., DIPL.-CHEM. DR.RER.NAT. GOERG, K., DIPL.-ING. KOHLMANN, K., DIPL.-ING. KOLB, H., DIPL.-CHEM. DR.RER.NAT. RITTER UND EDLER VON FISCHERN, B., DIPL.-ING., PAT.-ANW. NETTE, A., RECHTSANW., 8000 MUENCHEN

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