HU186408B - Process for the continuous production of dichloro-acetamide derivatives - Google Patents
Process for the continuous production of dichloro-acetamide derivatives Download PDFInfo
- Publication number
- HU186408B HU186408B HU811086A HU108681A HU186408B HU 186408 B HU186408 B HU 186408B HU 811086 A HU811086 A HU 811086A HU 108681 A HU108681 A HU 108681A HU 186408 B HU186408 B HU 186408B
- Authority
- HU
- Hungary
- Prior art keywords
- reactor
- organic phase
- sodium hydroxide
- dichloroacetyl
- chloride
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- WCGGWVOVFQNRRS-UHFFFAOYSA-N dichloroacetamide Chemical class NC(=O)C(Cl)Cl WCGGWVOVFQNRRS-UHFFFAOYSA-N 0.000 title abstract description 3
- 238000010924 continuous production Methods 0.000 title description 6
- 229940058963 dichloroacetamide derivative drug for amoebiasis and other protozoal diseases Drugs 0.000 title description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 102
- FBCCMZVIWNDFMO-UHFFFAOYSA-N dichloroacetyl chloride Chemical compound ClC(Cl)C(Cl)=O FBCCMZVIWNDFMO-UHFFFAOYSA-N 0.000 claims abstract description 35
- YRMLFORXOOIJDR-UHFFFAOYSA-N Dichlormid Chemical compound ClC(Cl)C(=O)N(CC=C)CC=C YRMLFORXOOIJDR-UHFFFAOYSA-N 0.000 claims abstract description 14
- RLJHUAABUCHYNU-UHFFFAOYSA-N 2,2-dichloro-1-(1,3-oxazolidin-3-yl)ethanone Chemical class ClC(Cl)C(=O)N1CCOC1 RLJHUAABUCHYNU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 7
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims abstract description 3
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 claims abstract 3
- 239000012074 organic phase Substances 0.000 claims description 30
- 150000002917 oxazolidines Chemical class 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 21
- 239000000047 product Substances 0.000 claims description 20
- 239000008346 aqueous phase Substances 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 17
- 239000011541 reaction mixture Substances 0.000 claims description 10
- 239000012043 crude product Substances 0.000 claims description 8
- 239000012071 phase Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 17
- 238000010923 batch production Methods 0.000 abstract description 6
- 150000001408 amides Chemical class 0.000 abstract description 5
- DYUWTXWIYMHBQS-UHFFFAOYSA-N n-prop-2-enylprop-2-en-1-amine Chemical compound C=CCNCC=C DYUWTXWIYMHBQS-UHFFFAOYSA-N 0.000 abstract description 4
- WYNCHZVNFNFDNH-UHFFFAOYSA-N Oxazolidine Chemical compound C1COCN1 WYNCHZVNFNFDNH-UHFFFAOYSA-N 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 19
- 150000001412 amines Chemical class 0.000 description 14
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 12
- 125000000217 alkyl group Chemical group 0.000 description 10
- -1 dichloroacetyl Chemical group 0.000 description 10
- 239000011780 sodium chloride Substances 0.000 description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000006227 byproduct Substances 0.000 description 6
- 230000002363 herbicidal effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005191 phase separation Methods 0.000 description 6
- 239000000376 reactant Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 229940053194 antiepileptics oxazolidine derivative Drugs 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- FZERHIULMFGESH-UHFFFAOYSA-N N-phenylacetamide Chemical compound CC(=O)NC1=CC=CC=C1 FZERHIULMFGESH-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 229940080263 sodium dichloroacetate Drugs 0.000 description 4
- LUPNKHXLFSSUGS-UHFFFAOYSA-M sodium;2,2-dichloroacetate Chemical compound [Na+].[O-]C(=O)C(Cl)Cl LUPNKHXLFSSUGS-UHFFFAOYSA-M 0.000 description 4
- 125000004765 (C1-C4) haloalkyl group Chemical group 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 229960001413 acetanilide Drugs 0.000 description 3
- 150000001263 acyl chlorides Chemical class 0.000 description 3
- 239000004009 herbicide Substances 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- UENGBOCGGKLVJJ-UHFFFAOYSA-N 2-chloro-1-(2,4-difluorophenyl)ethanone Chemical compound FC1=CC=C(C(=O)CCl)C(F)=C1 UENGBOCGGKLVJJ-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- 125000000882 C2-C6 alkenyl group Chemical group 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 150000008061 acetanilides Chemical class 0.000 description 2
- 125000004183 alkoxy alkyl group Chemical group 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- JXTHNDFMNIQAHM-UHFFFAOYSA-N dichloroacetic acid Chemical compound OC(=O)C(Cl)Cl JXTHNDFMNIQAHM-UHFFFAOYSA-N 0.000 description 2
- 125000001188 haloalkyl group Chemical group 0.000 description 2
- 229910052740 iodine Chemical group 0.000 description 2
- 239000011630 iodine Chemical group 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000012925 reference material Substances 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000003558 thiocarbamic acid derivatives Chemical class 0.000 description 2
- XMPCGZCCOXWBKR-UHFFFAOYSA-N 2,2,5-trimethyl-1,3-oxazolidine Chemical compound CC1CNC(C)(C)O1 XMPCGZCCOXWBKR-UHFFFAOYSA-N 0.000 description 1
- MFVHJGAZZFHCJX-UHFFFAOYSA-N 2,2-dichloro-1-(2,2,5-trimethyl-1,3-oxazol-3-yl)ethanone Chemical compound CC1=CN(C(=O)C(Cl)Cl)C(C)(C)O1 MFVHJGAZZFHCJX-UHFFFAOYSA-N 0.000 description 1
- VTNQPKFIQCLBDU-UHFFFAOYSA-N Acetochlor Chemical compound CCOCN(C(=O)CCl)C1=C(C)C=CC=C1CC VTNQPKFIQCLBDU-UHFFFAOYSA-N 0.000 description 1
- BMTAFVWTTFSTOG-UHFFFAOYSA-N Butylate Chemical compound CCSC(=O)N(CC(C)C)CC(C)C BMTAFVWTTFSTOG-UHFFFAOYSA-N 0.000 description 1
- ALBYIQCGZKXANZ-UHFFFAOYSA-N CC[S+]=C(NC1CCCCC1)[O-] Chemical compound CC[S+]=C(NC1CCCCC1)[O-] ALBYIQCGZKXANZ-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- WFKSADNZWSKCRZ-UHFFFAOYSA-N Diethatyl-ethyl Chemical compound CCOC(=O)CN(C(=O)CCl)C1=C(CC)C=CC=C1CC WFKSADNZWSKCRZ-UHFFFAOYSA-N 0.000 description 1
- GUVLYNGULCJVDO-UHFFFAOYSA-N EPTC Chemical compound CCCN(CCC)C(=O)SCC GUVLYNGULCJVDO-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- YNQSILKYZQZHFJ-UHFFFAOYSA-N R-29148 Chemical compound CC1CN(C(=O)C(Cl)Cl)C(C)(C)O1 YNQSILKYZQZHFJ-UHFFFAOYSA-N 0.000 description 1
- OKUGPJPKMAEJOE-UHFFFAOYSA-N S-propyl dipropylcarbamothioate Chemical compound CCCSC(=O)N(CCC)CCC OKUGPJPKMAEJOE-UHFFFAOYSA-N 0.000 description 1
- 239000002262 Schiff base Substances 0.000 description 1
- 150000004753 Schiff bases Chemical class 0.000 description 1
- GNVMUORYQLCPJZ-UHFFFAOYSA-M Thiocarbamate Chemical compound NC([S-])=O GNVMUORYQLCPJZ-UHFFFAOYSA-M 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 230000010933 acylation Effects 0.000 description 1
- 238000005917 acylation reaction Methods 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000005078 alkoxycarbonylalkyl group Chemical group 0.000 description 1
- 239000000729 antidote Substances 0.000 description 1
- 229940075522 antidotes Drugs 0.000 description 1
- HKPHPIREJKHECO-UHFFFAOYSA-N butachlor Chemical compound CCCCOCN(C(=O)CCl)C1=C(CC)C=CC=C1CC HKPHPIREJKHECO-UHFFFAOYSA-N 0.000 description 1
- 150000001728 carbonyl compounds Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- PDQRIMRBJSQRSL-UHFFFAOYSA-N di(propan-2-yl)carbamothioic s-acid Chemical compound CC(C)N(C(C)C)C(S)=O PDQRIMRBJSQRSL-UHFFFAOYSA-N 0.000 description 1
- 229960005215 dichloroacetic acid Drugs 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 125000005879 dioxolanyl group Chemical group 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- DEDOPGXGGQYYMW-UHFFFAOYSA-N molinate Chemical compound CCSC(=O)N1CCCCCC1 DEDOPGXGGQYYMW-UHFFFAOYSA-N 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- GJVFBWCTGUSGDD-UHFFFAOYSA-L pentamethonium bromide Chemical compound [Br-].[Br-].C[N+](C)(C)CCCCC[N+](C)(C)C GJVFBWCTGUSGDD-UHFFFAOYSA-L 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- MFOUDYKPLGXPGO-UHFFFAOYSA-N propachlor Chemical compound ClCC(=O)N(C(C)C)C1=CC=CC=C1 MFOUDYKPLGXPGO-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
- C07D263/04—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/144,500 US4278799A (en) | 1980-04-28 | 1980-04-28 | Continuous process for the production of dichloroacetamides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| HU186408B true HU186408B (en) | 1985-07-29 |
Family
ID=22508885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HU811086A HU186408B (en) | 1980-04-28 | 1981-04-27 | Process for the continuous production of dichloro-acetamide derivatives |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4278799A (en, 2012) |
| EP (1) | EP0039166B1 (en, 2012) |
| JP (1) | JPS56167672A (en, 2012) |
| KR (1) | KR840002443B1 (en, 2012) |
| AT (1) | ATE8875T1 (en, 2012) |
| BR (1) | BR8102388A (en, 2012) |
| CA (1) | CA1157867A (en, 2012) |
| CS (1) | CS226428B2 (en, 2012) |
| DD (1) | DD158643A5 (en, 2012) |
| DE (1) | DE3165344D1 (en, 2012) |
| DK (1) | DK158465C (en, 2012) |
| HU (1) | HU186408B (en, 2012) |
| IL (1) | IL62721A (en, 2012) |
| PL (1) | PL133589B1 (en, 2012) |
| ZA (1) | ZA812763B (en, 2012) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990005725A1 (en) * | 1988-11-14 | 1990-05-31 | Ici Americas Inc. | Process for the acylation of thiazolidines |
| JPH0376060A (ja) * | 1989-08-16 | 1991-04-02 | Nec Corp | 磁気ディスク装置のヘッド位置決め装置 |
| WO1991012229A1 (en) * | 1990-02-12 | 1991-08-22 | National Research Council Of Canada | Process for preparing acyl derivatives of acylatable compounds |
| CN114213271A (zh) * | 2021-12-30 | 2022-03-22 | 徐州彰梁生化科技有限公司 | 一种二氯丙烯胺的制备方法 |
| CN117247328B (zh) * | 2023-09-13 | 2025-04-22 | 无锡颐景丰科技有限公司 | 一种二氯丙烯胺的合成方法 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268324A (en) * | 1965-10-11 | 1966-08-23 | Monsanto Co | Herbicidal composition and method employing oxa aliphatic acetamide |
| US3647876A (en) * | 1969-08-14 | 1972-03-07 | Virginia Chemicals Inc | Process in the preparation of n n-di-n-propyl-alpha-chloroacetamid |
| US3884671A (en) * | 1972-08-15 | 1975-05-20 | Scm Corp | Herbicidal n-haloacyl (2-alkylated) oxazolidines |
| US4186130A (en) * | 1973-05-02 | 1980-01-29 | Stauffer Chemical Company | N-(haloalkanoyl) oxazolidines |
| US3914302A (en) * | 1974-01-31 | 1975-10-21 | Stauffer Chemical Co | Process for the production of N,N-diallyldichloroacetamide |
| US3959304A (en) * | 1974-07-01 | 1976-05-25 | Stauffer Chemical Company | Certain 3-haloacyl-2,2,5-trimethyl-oxazolidines |
| US4072688A (en) * | 1975-02-14 | 1978-02-07 | Stauffer Chemical Company | Haloacyl and thiohaloacyl aryl-substituted oxazolidines and thiazolidines-herbicidal antidotes |
| US4038284A (en) * | 1975-07-28 | 1977-07-26 | Stauffer Chemical Company | N-acylation of oxazolidines |
| GB1538318A (en) * | 1976-08-09 | 1979-01-17 | Stauffer Chemical Co | Preparation of n-substituted oxazolidines |
-
1980
- 1980-04-28 US US06/144,500 patent/US4278799A/en not_active Expired - Lifetime
-
1981
- 1981-04-13 AT AT81301619T patent/ATE8875T1/de active
- 1981-04-13 EP EP81301619A patent/EP0039166B1/en not_active Expired
- 1981-04-13 DE DE8181301619T patent/DE3165344D1/de not_active Expired
- 1981-04-20 BR BR8102388A patent/BR8102388A/pt not_active IP Right Cessation
- 1981-04-24 JP JP6153781A patent/JPS56167672A/ja active Granted
- 1981-04-24 CA CA000376175A patent/CA1157867A/en not_active Expired
- 1981-04-27 IL IL62721A patent/IL62721A/xx not_active IP Right Cessation
- 1981-04-27 KR KR1019810001442A patent/KR840002443B1/ko not_active Expired
- 1981-04-27 HU HU811086A patent/HU186408B/hu not_active IP Right Cessation
- 1981-04-27 DK DK186381A patent/DK158465C/da not_active IP Right Cessation
- 1981-04-27 ZA ZA00812763A patent/ZA812763B/xx unknown
- 1981-04-27 DD DDAPC07D/2295311A patent/DD158643A5/de not_active IP Right Cessation
- 1981-04-28 CS CS813167A patent/CS226428B2/cs unknown
- 1981-04-28 PL PL1981230885A patent/PL133589B1/pl unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL133589B1 (en) | 1985-06-29 |
| DE3165344D1 (en) | 1984-09-13 |
| PL230885A1 (en, 2012) | 1981-12-23 |
| CA1157867A (en) | 1983-11-29 |
| DK158465B (da) | 1990-05-21 |
| JPS6412265B2 (en, 2012) | 1989-02-28 |
| DD158643A5 (de) | 1983-01-26 |
| DK158465C (da) | 1990-10-08 |
| EP0039166A1 (en) | 1981-11-04 |
| ATE8875T1 (de) | 1984-08-15 |
| DK186381A (da) | 1981-10-29 |
| IL62721A0 (en) | 1981-06-29 |
| IL62721A (en) | 1984-05-31 |
| US4278799A (en) | 1981-07-14 |
| CS226428B2 (en) | 1984-03-19 |
| ZA812763B (en) | 1982-06-30 |
| BR8102388A (pt) | 1981-12-22 |
| KR840002443B1 (ko) | 1984-12-28 |
| JPS56167672A (en) | 1981-12-23 |
| EP0039166B1 (en) | 1984-08-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| HU90 | Patent valid on 900628 | ||
| HMM4 | Cancellation of final prot. due to non-payment of fee |