DE1164982B - Vorrichtung zum Reinigen von Halbleitermaterial - Google Patents

Vorrichtung zum Reinigen von Halbleitermaterial

Info

Publication number
DE1164982B
DE1164982B DEI14490A DEI0014490A DE1164982B DE 1164982 B DE1164982 B DE 1164982B DE I14490 A DEI14490 A DE I14490A DE I0014490 A DEI0014490 A DE I0014490A DE 1164982 B DE1164982 B DE 1164982B
Authority
DE
Germany
Prior art keywords
crucible
silicon
coil
semiconductor material
zone
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.)
Pending
Application number
DEI14490A
Other languages
German (de)
English (en)
Inventor
Reginald Walter Warren
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 GB7540/57A external-priority patent/GB827676A/en
Priority claimed from GB3627257A external-priority patent/GB871156A/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority claimed from GB829558A external-priority patent/GB871157A/en
Priority claimed from GB949458A external-priority patent/GB875592A/en
Priority claimed from GB18772/58A external-priority patent/GB899287A/en
Publication of DE1164982B publication Critical patent/DE1164982B/de
Pending legal-status Critical Current

Links

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
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • H05B6/32—Arrangements for simultaneous levitation and heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
    • B01J6/005—Fusing
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/02—Silicon
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/02—Silicon
    • C01B33/021—Preparation
    • C01B33/027—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material
    • C01B33/029—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material by decomposition of monosilane
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/02—Boron; Borides
    • C01B35/023—Boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B41/00—Obtaining germanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
    • C22B60/02—Obtaining thorium, uranium, or other actinides
    • C22B60/0204—Obtaining thorium, uranium, or other actinides obtaining uranium
    • C22B60/0286—Obtaining thorium, uranium, or other actinides obtaining uranium refining, melting, remelting, working up uranium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • C30B13/14—Crucibles or vessels
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • C30B13/16—Heating of the molten zone
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • C30B13/16—Heating of the molten zone
    • C30B13/18—Heating of the molten zone the heating element being in contact with, or immersed in, the molten zone
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • C30B13/16—Heating of the molten zone
    • C30B13/20—Heating of the molten zone by induction, e.g. hot wire technique
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
    • C30B15/10—Crucibles or containers for supporting the melt
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
    • C30B15/14—Heating of the melt or the crystallised materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10S117/90—Apparatus characterized by composition or treatment thereof, e.g. surface finish, surface coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10T117/10—Apparatus
    • Y10T117/1024—Apparatus for crystallization from liquid or supercritical state
    • Y10T117/1076—Apparatus for crystallization from liquid or supercritical state having means for producing a moving solid-liquid-solid zone
    • Y10T117/108—Including a solid member other than seed or product contacting the liquid [e.g., crucible, immersed heating element]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Thermal Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Silicon Compounds (AREA)
DEI14490A 1957-03-07 1958-03-04 Vorrichtung zum Reinigen von Halbleitermaterial Pending DE1164982B (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB7540/57A GB827676A (en) 1957-03-07 1957-03-07 Method and apparatus for heat treating semi-conductor material
GB3627257A GB871156A (en) 1957-11-21 1957-11-21 Improvements in or relating to growing monocrystals of semiconductor material
GB37764/57A GB889615A (en) 1957-03-07 1957-12-04 Method and apparatus for processing metals
GB829558A GB871157A (en) 1958-03-14 1958-03-14 Improvements in or relating to apparatus for processing fusible materials
GB949458A GB875592A (en) 1958-03-25 1958-03-25 Improvements in or relating to methods and apparatus for melting materials
GB18772/58A GB899287A (en) 1958-06-12 1958-06-12 Method and apparatus for heat treating fusible material

Publications (1)

Publication Number Publication Date
DE1164982B true DE1164982B (de) 1964-03-12

Family

ID=27546551

Family Applications (4)

Application Number Title Priority Date Filing Date
DEI14490A Pending DE1164982B (de) 1957-03-07 1958-03-04 Vorrichtung zum Reinigen von Halbleitermaterial
DEI15671A Pending DE1191970B (de) 1957-03-07 1958-11-24 Vorrichtung zur Schmelzbehandlung von Metallen
DEI16140A Pending DE1293934B (de) 1957-03-07 1959-03-12 Zonenschmelzen von schwer schmelzbarem Material
DEI16553A Pending DE1226539B (de) 1957-03-07 1959-06-10 Tiegel zum Schmelzen und Zonenschmelzen von Halbleitermaterial

Family Applications After (3)

Application Number Title Priority Date Filing Date
DEI15671A Pending DE1191970B (de) 1957-03-07 1958-11-24 Vorrichtung zur Schmelzbehandlung von Metallen
DEI16140A Pending DE1293934B (de) 1957-03-07 1959-03-12 Zonenschmelzen von schwer schmelzbarem Material
DEI16553A Pending DE1226539B (de) 1957-03-07 1959-06-10 Tiegel zum Schmelzen und Zonenschmelzen von Halbleitermaterial

Country Status (7)

Country Link
US (1) US3172734A (hu)
BE (1) BE565404A (hu)
CH (3) CH385794A (hu)
DE (4) DE1164982B (hu)
FR (1) FR1192712A (hu)
GB (1) GB889615A (hu)
NL (7) NL237042A (hu)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796548A (en) * 1971-09-13 1974-03-12 Ibm Boat structure in an apparatus for making semiconductor compound single crystals
FR2512066B1 (fr) * 1981-09-03 1986-05-16 Cogema Procede de separation physique d'une phase metallique et de scories dans un four a induction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE528916A (hu) * 1953-05-18
DE518499C (de) * 1926-11-02 1931-02-16 Siemens & Halske Akt Ges Verfahren zum Schmelzen schwerschmelzbarer Metalle, insbesondere von Tantal, Wolfram, Thorium oder Legierungen dieser Metalle in einem wassergekuehlten Behaelter
DE536300C (de) * 1929-09-04 1931-10-22 Hirsch Kupfer Und Messingwerke Verfahren und Vorrichtung zum Betriebe elektrischer Induktionsoefen
DE903266C (de) * 1941-04-05 1954-02-04 Aeg Elektrischer Induktionsofen zum Schmelzen von Magnesium und seinen Legierungen
DE968582C (de) * 1952-08-07 1958-03-06 Telefunken Gmbh Verfahren zur Bereitung einer Schmelze eines bei gewoehnlicher Temperatur halbleitenden Materials

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541764A (en) * 1948-04-15 1951-02-13 Battelle Development Corp Electric apparatus for melting refractory metals
US2768074A (en) * 1949-09-24 1956-10-23 Nat Res Corp Method of producing metals by decomposition of halides
US2686865A (en) * 1951-10-20 1954-08-17 Westinghouse Electric Corp Stabilizing molten material during magnetic levitation and heating thereof
NL168491B (hu) * 1951-11-16 Roussel-Uclaf, Societe Anonyme Te Parijs.
US2785058A (en) * 1952-04-28 1957-03-12 Bell Telephone Labor Inc Method of growing quartz crystals
US2719799A (en) * 1952-11-13 1955-10-04 Rca Corp Zone melting furnace and method of zone melting
GB734973A (en) * 1953-04-30 1955-08-10 Gen Electric Co Ltd Improvements in or relating to fractional fusion methods
DE975708C (de) * 1953-08-12 1962-06-14 Standard Elek K Lorenz Ag Verdampfer zur Verdampfung von Metallen, insbesondere im Hochvakuum
US2872299A (en) * 1954-11-30 1959-02-03 Rca Corp Preparation of reactive materials in a molten non-reactive lined crucible
DE1007885B (de) * 1955-07-28 1957-05-09 Siemens Ag Heizanordnung fuer Halbleiterkristall-Zieheinrichtungen, welche vorzugsweise nach dem Schmelzzonenverfahren arbeiten
US2836412A (en) * 1955-08-22 1958-05-27 Titanium Metals Corp Arc melting crucible
FR1141561A (fr) * 1956-01-20 1957-09-04 Cedel Procédé et moyens pour la fabrication de matériaux semi-conducteurs
US2870309A (en) * 1957-06-11 1959-01-20 Emil R Capita Zone purification device
US2897329A (en) * 1957-09-23 1959-07-28 Sylvania Electric Prod Zone melting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE518499C (de) * 1926-11-02 1931-02-16 Siemens & Halske Akt Ges Verfahren zum Schmelzen schwerschmelzbarer Metalle, insbesondere von Tantal, Wolfram, Thorium oder Legierungen dieser Metalle in einem wassergekuehlten Behaelter
DE536300C (de) * 1929-09-04 1931-10-22 Hirsch Kupfer Und Messingwerke Verfahren und Vorrichtung zum Betriebe elektrischer Induktionsoefen
DE903266C (de) * 1941-04-05 1954-02-04 Aeg Elektrischer Induktionsofen zum Schmelzen von Magnesium und seinen Legierungen
DE968582C (de) * 1952-08-07 1958-03-06 Telefunken Gmbh Verfahren zur Bereitung einer Schmelze eines bei gewoehnlicher Temperatur halbleitenden Materials
BE528916A (hu) * 1953-05-18

Also Published As

Publication number Publication date
DE1191970B (de) 1965-04-29
NL113928C (hu) 1900-01-01
DE1293934B (de) 1969-04-30
NL239559A (hu) 1900-01-01
CH385794A (de) 1964-12-31
FR1192712A (fr) 1959-10-28
GB889615A (en) 1962-02-21
NL114078C (hu) 1900-01-01
CH416572A (de) 1966-07-15
DE1226539B (de) 1966-10-13
CH435757A (de) 1967-05-15
BE565404A (hu) 1958-09-05
US3172734A (en) 1965-03-09
NL225605A (hu) 1900-01-01
NL236919A (hu) 1900-01-01
NL237042A (hu) 1900-01-01
NL233434A (hu) 1900-01-01

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