DE1909192A1 - Verfahren zum gleichzeitigen Herstellen von pulverisiertem Eisen und aktivierter Kohle - Google Patents
Verfahren zum gleichzeitigen Herstellen von pulverisiertem Eisen und aktivierter KohleInfo
- Publication number
- DE1909192A1 DE1909192A1 DE19691909192 DE1909192A DE1909192A1 DE 1909192 A1 DE1909192 A1 DE 1909192A1 DE 19691909192 DE19691909192 DE 19691909192 DE 1909192 A DE1909192 A DE 1909192A DE 1909192 A1 DE1909192 A1 DE 1909192A1
- Authority
- DE
- Germany
- Prior art keywords
- reducing agent
- iron
- reduction
- carbon
- ore
- 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.)
- Withdrawn
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 47
- 238000000034 method Methods 0.000 title claims description 31
- 230000008569 process Effects 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000012256 powdered iron Substances 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 81
- 239000003638 chemical reducing agent Substances 0.000 claims description 75
- 230000009467 reduction Effects 0.000 claims description 45
- 229910052742 iron Inorganic materials 0.000 claims description 37
- 239000003245 coal Substances 0.000 claims description 35
- 239000007789 gas Substances 0.000 claims description 25
- 229910052799 carbon Inorganic materials 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 7
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 5
- 239000003830 anthracite Substances 0.000 claims description 5
- 230000005021 gait Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 150000001721 carbon Chemical class 0.000 claims 1
- 238000010828 elution Methods 0.000 claims 1
- 239000011541 reaction mixture Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
- 238000006722 reduction reaction Methods 0.000 description 43
- 239000000047 product Substances 0.000 description 29
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 17
- 230000009257 reactivity Effects 0.000 description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000011269 tar Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000004043 responsiveness Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 229910052595 hematite Inorganic materials 0.000 description 4
- 239000011019 hematite Substances 0.000 description 4
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000003077 lignite Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000006148 magnetic separator Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- KRQUFUKTQHISJB-YYADALCUSA-N 2-[(E)-N-[2-(4-chlorophenoxy)propoxy]-C-propylcarbonimidoyl]-3-hydroxy-5-(thian-3-yl)cyclohex-2-en-1-one Chemical compound CCC\C(=N/OCC(C)OC1=CC=C(Cl)C=C1)C1=C(O)CC(CC1=O)C1CCCSC1 KRQUFUKTQHISJB-YYADALCUSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000282994 Cervidae Species 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 241001137251 Corvidae Species 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241001024304 Mino Species 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 229940099112 cornstarch Drugs 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 235000015108 pies Nutrition 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 229910021646 siderite Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 235000013759 synthetic iron oxide Nutrition 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0086—Conditioning, transformation of reduced iron ores
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Carbon And Carbon Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70887268A | 1968-02-28 | 1968-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1909192A1 true DE1909192A1 (de) | 1971-04-22 |
Family
ID=24847506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691909192 Withdrawn DE1909192A1 (de) | 1968-02-28 | 1969-02-24 | Verfahren zum gleichzeitigen Herstellen von pulverisiertem Eisen und aktivierter Kohle |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US3617256A (en, 2012) |
| JP (1) | JPS514928B1 (en, 2012) |
| AT (1) | AT288453B (en, 2012) |
| BE (1) | BE728555A (en, 2012) |
| CS (1) | CS170134B2 (en, 2012) |
| DE (1) | DE1909192A1 (en, 2012) |
| FR (1) | FR2002775A1 (en, 2012) |
| GB (1) | GB1220038A (en, 2012) |
| LU (1) | LU58024A1 (en, 2012) |
| NL (1) | NL164904C (en, 2012) |
| SE (1) | SE365544B (en, 2012) |
| SU (1) | SU654181A3 (en, 2012) |
| TR (1) | TR18065A (en, 2012) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4981295A (en, 2012) * | 1972-12-12 | 1974-08-06 | ||
| US4375883A (en) * | 1980-03-24 | 1983-03-08 | The Direct Reduction Corporation | System for recycling char in iron oxide reducing kilns |
| GB2118976A (en) * | 1982-03-25 | 1983-11-09 | Davy Mckee | Direct reduction of iron ore |
| US5752993A (en) * | 1994-01-21 | 1998-05-19 | Covol Technologies, Inc. | Blast furnace fuel from reclaimed carbonaceous materials and related methods |
| US5516358A (en) * | 1994-11-17 | 1996-05-14 | Pro-Tech Reclamation, Inc. | Method for the production of iron carbide |
| EA001158B1 (ru) * | 1996-03-15 | 2000-10-30 | Кабусики Кайся Кобе Сейко Сё | Способ и устройство для получения металлического железа |
| US6506231B2 (en) * | 1996-03-15 | 2003-01-14 | Kabushiki Kaisha Kobe Seiko Sho | Method and apparatus for making metallic iron |
| LU90315B1 (de) * | 1998-11-05 | 2000-05-08 | Wurth Paul Sa | Verfahren zur thermischen Behandlung schwermetallhaltiger Reststoffe |
| JP4673098B2 (ja) * | 2005-03-15 | 2011-04-20 | 中部電力株式会社 | 還元雰囲気の超臨界水を用いた磁性体の合成方法 |
| WO2011001282A2 (en) | 2009-06-29 | 2011-01-06 | Bairong Li | Metal reduction processes, metallurgical processes and products and apparatus |
| JP5406803B2 (ja) * | 2010-08-09 | 2014-02-05 | 株式会社神戸製鋼所 | 粒状金属鉄の製造装置、および粒状金属鉄の製造方法 |
| CN102658369A (zh) * | 2012-05-18 | 2012-09-12 | 北京科技大学 | 一种铅渣煤基直接还原生产金属铁粉的方法 |
| CN104508151A (zh) * | 2012-08-03 | 2015-04-08 | 株式会社神户制钢所 | 金属铁的制造方法 |
| CN105274324B (zh) * | 2015-09-11 | 2017-10-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 一种铁矿石隧道窑磁化焙烧分层布料还原方法 |
| CN111099590A (zh) * | 2019-06-05 | 2020-05-05 | 武汉科思瑞迪科技有限公司 | 煤基活性炭生产工艺 |
| JP7040659B1 (ja) * | 2021-03-31 | 2022-03-23 | Ｊｆｅスチール株式会社 | 還元炉の操業方法 |
| CN113877525A (zh) * | 2021-09-10 | 2022-01-04 | 中国地质大学（武汉） | 一种磁性焦炭修复重金属污染水体的方法 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2248735A (en) * | 1940-01-15 | 1941-07-08 | Kelsey Hayes Wheel Co | Method of producing sponge iron and reducing agent therefor |
| US2792298A (en) * | 1954-04-09 | 1957-05-14 | Freeman Horace | Iron oxide reduction |
| US2880083A (en) * | 1954-05-06 | 1959-03-31 | R N Corp | Method of producing sponge iron |
| US2944884A (en) * | 1958-01-23 | 1960-07-12 | United States Steel Corp | Method of beneficiating reducing and briquetting iron ore |
| US3029141A (en) * | 1960-03-21 | 1962-04-10 | Canada Steel Co | Process for the reduction of iron oxide |
| US3046106A (en) * | 1960-06-22 | 1962-07-24 | Exxon Research Engineering Co | Iron ore reduction with coke |
| DE1200330B (de) * | 1960-09-15 | 1965-09-09 | Metallgesellschaft Ag | Verfahren zur Reduktion stueckiger oxydischer Eisenerze zu einem schwammeisenartigen Produkt im Drehrohrofen |
| US3126277A (en) * | 1960-12-06 | 1964-03-24 | Ore reduction process | |
| US3185563A (en) * | 1961-05-17 | 1965-05-25 | R N Corp | Method and means for prevention of reoxidation of iron concentrates and the like |
| US3149961A (en) * | 1961-09-27 | 1964-09-22 | R N Corp | Processing of manganiferous ores |
| DE1262311B (de) * | 1962-06-30 | 1968-03-07 | Metallgesellschaft Ag | Verfahren und Vorrichtung zum Reduzieren von Eisenoxyden (Konzentraten) zu Eisenschwamm |
-
1968
- 1968-02-28 US US708872A patent/US3617256A/en not_active Expired - Lifetime
-
1969
- 1969-02-17 BE BE728555D patent/BE728555A/xx unknown
- 1969-02-18 LU LU58024D patent/LU58024A1/xx unknown
- 1969-02-18 TR TR18065A patent/TR18065A/xx unknown
- 1969-02-20 CS CS1217A patent/CS170134B2/cs unknown
- 1969-02-21 GB GB9405/69A patent/GB1220038A/en not_active Expired
- 1969-02-24 DE DE19691909192 patent/DE1909192A1/de not_active Withdrawn
- 1969-02-26 SU SU691311268A patent/SU654181A3/ru active
- 1969-02-26 FR FR6905018A patent/FR2002775A1/fr not_active Withdrawn
- 1969-02-27 AT AT197269A patent/AT288453B/de not_active IP Right Cessation
- 1969-02-28 NL NL6903215.A patent/NL164904C/xx not_active IP Right Cessation
- 1969-02-28 SE SE02830/69A patent/SE365544B/xx unknown
- 1969-02-28 JP JP44014749A patent/JPS514928B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| TR18065A (tr) | 1976-09-19 |
| FR2002775A1 (en, 2012) | 1969-10-31 |
| JPS514928B1 (en, 2012) | 1976-02-16 |
| US3617256A (en) | 1971-11-02 |
| CS170134B2 (en, 2012) | 1976-08-27 |
| SU654181A3 (ru) | 1979-03-25 |
| BE728555A (en, 2012) | 1969-08-01 |
| AT288453B (de) | 1971-03-10 |
| LU58024A1 (en, 2012) | 1969-05-22 |
| NL6903215A (en, 2012) | 1969-09-01 |
| NL164904C (nl) | 1981-02-16 |
| NL164904B (nl) | 1980-09-15 |
| SE365544B (en, 2012) | 1974-03-25 |
| GB1220038A (en) | 1971-01-20 |
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Legal Events
| Date | Code | Title | Description |
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