NO123641B - - Google Patents
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- Publication number
- NO123641B NO123641B NO170923A NO17092367A NO123641B NO 123641 B NO123641 B NO 123641B NO 170923 A NO170923 A NO 170923A NO 17092367 A NO17092367 A NO 17092367A NO 123641 B NO123641 B NO 123641B
- Authority
- NO
- Norway
- Prior art keywords
- graphitized
- substances
- heat
- products
- resistance
- Prior art date
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012459 cleaning agent Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 239000003517 fume Substances 0.000 claims description 2
- 229910001512 metal fluoride Inorganic materials 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 238000005087 graphitization Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 14
- 239000003245 coal Substances 0.000 description 11
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- 239000002006 petroleum coke Substances 0.000 description 3
- 235000013024 sodium fluoride Nutrition 0.000 description 3
- 239000011775 sodium fluoride Substances 0.000 description 3
- 239000011269 tar Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 235000021395 porridge Nutrition 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007937 lozenge Substances 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000803 paradoxical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- 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
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/36—Carbides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/06—Inorganic material, e.g. asbestos fibres, glass beads or fibres
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
- C01B32/963—Preparation from compounds containing silicon
- C01B32/984—Preparation from elemental silicon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62227—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres
-
- 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
- C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
- C30B11/04—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt
- C30B11/08—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt every component of the crystal composition being added during the crystallisation
- C30B11/12—Vaporous components, e.g. vapour-liquid-solid-growth
-
- 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
- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/005—Growth of whiskers or needles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- 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
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/19—Inorganic fiber
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Carbon And Carbon Compounds (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL666617544A NL143436B (nl) | 1966-12-14 | 1966-12-14 | Werkwijze voor het vervaardigen van draadvormige siliciumcarbide kristallen en voorwerpen geheel of voor een deel bestaande uit deze kristallen. |
| NL6703609A NL6703609A (nl) | 1967-03-08 | 1967-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO123641B true NO123641B (nl) | 1971-12-27 |
Family
ID=26644120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO170923A NO123641B (nl) | 1966-12-14 | 1967-12-11 |
Country Status (13)
| Country | Link |
|---|---|
| US (2) | US3721732A (nl) |
| JP (1) | JPS5411280B1 (nl) |
| AT (2) | AT294772B (nl) |
| BE (2) | BE707877A (nl) |
| CH (2) | CH520076A (nl) |
| DE (2) | DE1667657C3 (nl) |
| DK (1) | DK122220B (nl) |
| ES (2) | ES348181A1 (nl) |
| FR (2) | FR1547963A (nl) |
| GB (2) | GB1213156A (nl) |
| NL (1) | NL143436B (nl) |
| NO (1) | NO123641B (nl) |
| SE (1) | SE334868B (nl) |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL143436B (nl) * | 1966-12-14 | 1974-10-15 | Philips Nv | Werkwijze voor het vervaardigen van draadvormige siliciumcarbide kristallen en voorwerpen geheel of voor een deel bestaande uit deze kristallen. |
| NL7005963A (nl) * | 1970-04-24 | 1971-10-26 | ||
| US4582561A (en) * | 1979-01-25 | 1986-04-15 | Sharp Kabushiki Kaisha | Method for making a silicon carbide substrate |
| US4382837A (en) * | 1981-06-30 | 1983-05-10 | International Business Machines Corporation | Epitaxial crystal fabrication of SiC:AlN |
| JPS599220A (ja) * | 1982-06-30 | 1984-01-18 | Shin Etsu Chem Co Ltd | 炭化けい素繊維の製造方法 |
| CA1275088A (en) * | 1985-12-30 | 1990-10-09 | Peter D. Shalek | Prealloyed catalyst for growing silicon carbide whiskers |
| US4789537A (en) * | 1985-12-30 | 1988-12-06 | The United States Of America As Represented By The United States Department Of Energy | Prealloyed catalyst for growing silicon carbide whiskers |
| US4702901A (en) * | 1986-03-12 | 1987-10-27 | The United States Of America As Represented By The United States Department Of Energy | Process for growing silicon carbide whiskers by undercooling |
| US4911781A (en) * | 1987-05-05 | 1990-03-27 | The Standard Oil Company | VLS Fiber growth process |
| US5404836A (en) * | 1989-02-03 | 1995-04-11 | Milewski; John V. | Method and apparatus for continuous controlled production of single crystal whiskers |
| US4971834A (en) * | 1989-06-29 | 1990-11-20 | Therm Incorporated | Process for preparing precursor for silicon carbide whiskers |
| US5055276A (en) * | 1989-11-15 | 1991-10-08 | Huckins Harold A | Ceramic whisker growing system |
| US5207263A (en) * | 1989-12-26 | 1993-05-04 | Bp America Inc. | VLS silicon carbide whisker reinforced metal matrix composites |
| FR2658839B1 (fr) * | 1990-02-23 | 1997-06-20 | Thomson Csf | Procede de croissance controlee de cristaux aciculaires et application a la realisation de microcathodes a pointes. |
| JP2821061B2 (ja) * | 1992-05-22 | 1998-11-05 | 電気化学工業株式会社 | 単結晶の製造方法 |
| JP3769739B2 (ja) * | 1994-11-17 | 2006-04-26 | 住友電気工業株式会社 | 多孔質セラミックス膜及びその製造方法 |
| SE9502288D0 (sv) * | 1995-06-26 | 1995-06-26 | Abb Research Ltd | A device and a method for epitaxially growing objects by CVD |
| US6030661A (en) * | 1995-08-04 | 2000-02-29 | Abb Research Ltd. | Device and a method for epitaxially growing objects by CVD |
| DE69728410T2 (de) * | 1996-08-08 | 2005-05-04 | William Marsh Rice University, Houston | Makroskopisch manipulierbare, aus nanoröhrenanordnungen hergestellte vorrichtungen |
| US6632477B2 (en) | 2001-07-16 | 2003-10-14 | Chien-Min Sung | SiCN compositions and methods |
| US20040206008A1 (en) * | 2001-07-16 | 2004-10-21 | Chien-Min Sung | SiCN compositions and methods |
| US7449065B1 (en) | 2006-12-02 | 2008-11-11 | Ohio Aerospace Institute | Method for the growth of large low-defect single crystals |
| US10954167B1 (en) | 2010-10-08 | 2021-03-23 | Advanced Ceramic Fibers, Llc | Methods for producing metal carbide materials |
| US8940391B2 (en) | 2010-10-08 | 2015-01-27 | Advanced Ceramic Fibers, Llc | Silicon carbide fibers and articles including same |
| US9199227B2 (en) | 2011-08-23 | 2015-12-01 | Advanced Ceramic Fibers, Llc | Methods of producing continuous boron carbide fibers |
| US9803296B2 (en) | 2014-02-18 | 2017-10-31 | Advanced Ceramic Fibers, Llc | Metal carbide fibers and methods for their manufacture |
| US9275762B2 (en) | 2010-10-08 | 2016-03-01 | Advanced Ceramic Fibers, Llc | Cladding material, tube including such cladding material and methods of forming the same |
| US10208238B2 (en) | 2010-10-08 | 2019-02-19 | Advanced Ceramic Fibers, Llc | Boron carbide fiber reinforced articles |
| CN102534796B (zh) * | 2011-12-21 | 2014-11-05 | 西安交通大学 | 一种纯α碳化硅晶须的制备方法 |
| US10793478B2 (en) | 2017-09-11 | 2020-10-06 | Advanced Ceramic Fibers, Llc. | Single phase fiber reinforced ceramic matrix composites |
| DE102018100681A1 (de) * | 2018-01-12 | 2019-07-18 | Universität Paderborn | Verfahren zum Herstellen von Siliziumcarbid |
| DE102018100679A1 (de) * | 2018-01-12 | 2019-07-18 | Universität Paderborn | Vorrichtung und Verfahren zum Herstellen von Siliziumcarbid |
| CN108286074B (zh) * | 2018-01-26 | 2020-10-16 | 山东大学 | 一种大尺寸SiC单晶生长装置及其工作方法 |
| CN113479855B (zh) * | 2021-07-26 | 2022-11-22 | 武汉科技大学 | 一种利用体相层状过渡金属硫化物制备非层状二维过渡金属化合物的方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3053635A (en) * | 1960-09-26 | 1962-09-11 | Clevite Corp | Method of growing silicon carbide crystals |
| US3346414A (en) * | 1964-01-28 | 1967-10-10 | Bell Telephone Labor Inc | Vapor-liquid-solid crystal growth technique |
| NL6615376A (nl) * | 1966-11-01 | 1968-05-02 | ||
| US3493431A (en) * | 1966-11-25 | 1970-02-03 | Bell Telephone Labor Inc | Vapor-liquid-solid crystal growth technique |
| NL143436B (nl) * | 1966-12-14 | 1974-10-15 | Philips Nv | Werkwijze voor het vervaardigen van draadvormige siliciumcarbide kristallen en voorwerpen geheel of voor een deel bestaande uit deze kristallen. |
-
1966
- 1966-12-14 NL NL666617544A patent/NL143436B/nl unknown
-
1967
- 1967-12-11 NO NO170923A patent/NO123641B/no unknown
- 1967-12-11 CH CH1743167A patent/CH520076A/de not_active IP Right Cessation
- 1967-12-12 ES ES348181A patent/ES348181A1/es not_active Expired
- 1967-12-12 DE DE1667657A patent/DE1667657C3/de not_active Expired
- 1967-12-12 DK DK621167AA patent/DK122220B/da unknown
- 1967-12-12 BE BE707877D patent/BE707877A/xx unknown
- 1967-12-12 AT AT1119067A patent/AT294772B/de not_active IP Right Cessation
- 1967-12-12 GB GB56404/67D patent/GB1213156A/en not_active Expired
- 1967-12-13 JP JP7960567A patent/JPS5411280B1/ja active Pending
- 1967-12-13 FR FR132062A patent/FR1547963A/fr not_active Expired
- 1967-12-13 SE SE17117/67A patent/SE334868B/xx unknown
-
1968
- 1968-03-05 AT AT213068A patent/AT299124B/de not_active IP Right Cessation
- 1968-03-05 GB GB00592/68A patent/GB1213867A/en not_active Expired
- 1968-03-05 CH CH324268A patent/CH505647A/de not_active IP Right Cessation
- 1968-03-05 DE DE19681719493 patent/DE1719493A1/de active Pending
- 1968-03-06 ES ES351307A patent/ES351307A1/es not_active Expired
- 1968-03-07 US US00711349A patent/US3721732A/en not_active Expired - Lifetime
- 1968-03-08 BE BE711956D patent/BE711956A/xx unknown
- 1968-03-08 FR FR1556128D patent/FR1556128A/fr not_active Expired
-
1975
- 1975-07-25 US US05/599,087 patent/US4013503A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| SE334868B (nl) | 1971-05-10 |
| GB1213156A (en) | 1970-11-18 |
| FR1547963A (fr) | 1968-11-29 |
| DE1667657C3 (de) | 1973-10-18 |
| GB1213867A (en) | 1970-11-25 |
| ES351307A1 (es) | 1969-06-01 |
| NL143436B (nl) | 1974-10-15 |
| DK122220B (da) | 1972-02-07 |
| AT294772B (de) | 1971-12-10 |
| US4013503A (en) | 1977-03-22 |
| AT299124B (de) | 1972-06-12 |
| FR1556128A (nl) | 1969-01-31 |
| CH520076A (de) | 1972-03-15 |
| BE707877A (nl) | 1968-06-12 |
| CH505647A (de) | 1971-04-15 |
| NL6617544A (nl) | 1968-06-17 |
| BE711956A (nl) | 1968-09-09 |
| ES348181A1 (es) | 1969-06-16 |
| DE1719493A1 (de) | 1971-09-02 |
| JPS5411280B1 (nl) | 1979-05-14 |
| US3721732A (en) | 1973-03-20 |
| DE1667657B2 (de) | 1973-03-22 |
| DE1667657A1 (de) | 1972-03-16 |
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