DD149316A5 - Verfahren zur reinigung verunreinigter waermeaustauscher und sonstiger fertigungseinrichtungen - Google Patents
Verfahren zur reinigung verunreinigter waermeaustauscher und sonstiger fertigungseinrichtungen Download PDFInfo
- Publication number
- DD149316A5 DD149316A5 DD80219356A DD21935680A DD149316A5 DD 149316 A5 DD149316 A5 DD 149316A5 DD 80219356 A DD80219356 A DD 80219356A DD 21935680 A DD21935680 A DD 21935680A DD 149316 A5 DD149316 A5 DD 149316A5
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- cleaning solution
- item
- deposits
- halide
- copper
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000004140 cleaning Methods 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- -1 copper (I) halide Chemical class 0.000 claims abstract description 38
- 239000002904 solvent Substances 0.000 claims abstract description 28
- 239000002689 soil Substances 0.000 claims abstract description 27
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 21
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 21
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 21
- 238000000746 purification Methods 0.000 claims abstract description 11
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 66
- 239000002594 sorbent Substances 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 20
- VICFMGDSYWOHFN-UHFFFAOYSA-N aluminum;copper(1+) Chemical compound [Al+3].[Cu+] VICFMGDSYWOHFN-UHFFFAOYSA-N 0.000 claims description 11
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 239000000356 contaminant Substances 0.000 claims description 7
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052801 chlorine Inorganic materials 0.000 claims description 6
- 239000000460 chlorine Substances 0.000 claims description 6
- 150000004820 halides Chemical class 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052794 bromium Inorganic materials 0.000 claims description 3
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 3
- 229910052731 fluorine Chemical group 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims description 3
- 125000005234 alkyl aluminium group Chemical group 0.000 claims 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 18
- 239000007789 gas Substances 0.000 description 17
- 239000003446 ligand Substances 0.000 description 11
- 239000012535 impurity Substances 0.000 description 9
- 150000001336 alkenes Chemical class 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- UAIZDWNSWGTKFZ-UHFFFAOYSA-L ethylaluminum(2+);dichloride Chemical compound CC[Al](Cl)Cl UAIZDWNSWGTKFZ-UHFFFAOYSA-L 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- KPZGRMZPZLOPBS-UHFFFAOYSA-N 1,3-dichloro-2,2-bis(chloromethyl)propane Chemical compound ClCC(CCl)(CCl)CCl KPZGRMZPZLOPBS-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 3
- VMQMZMRVKUZKQL-UHFFFAOYSA-N Cu+ Chemical compound [Cu+] VMQMZMRVKUZKQL-UHFFFAOYSA-N 0.000 description 3
- 238000005804 alkylation reaction Methods 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 125000002534 ethynyl group Chemical class [H]C#C* 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 230000029936 alkylation Effects 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- CMAOLVNGLTWICC-UHFFFAOYSA-N 2-fluoro-5-methylbenzonitrile Chemical compound CC1=CC=C(F)C(C#N)=C1 CMAOLVNGLTWICC-UHFFFAOYSA-N 0.000 description 1
- FQKYJNCMGINPLP-UHFFFAOYSA-L 2-methylpropylaluminum(2+);difluoride Chemical compound [F-].[F-].CC(C)C[Al+2] FQKYJNCMGINPLP-UHFFFAOYSA-L 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- ODWXUNBKCRECNW-UHFFFAOYSA-M bromocopper(1+) Chemical compound Br[Cu+] ODWXUNBKCRECNW-UHFFFAOYSA-M 0.000 description 1
- VPCAAUUIFCAFRZ-UHFFFAOYSA-N butylalumane Chemical compound CCCC[AlH2] VPCAAUUIFCAFRZ-UHFFFAOYSA-N 0.000 description 1
- SHOVVTSKTTYFGP-UHFFFAOYSA-L butylaluminum(2+);dichloride Chemical compound CCCC[Al](Cl)Cl SHOVVTSKTTYFGP-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- URYYVOIYTNXXBN-UPHRSURJSA-N cyclooctene Chemical compound C1CCC\C=C/CC1 URYYVOIYTNXXBN-UPHRSURJSA-N 0.000 description 1
- 239000004913 cyclooctene Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- QXEHKWIXDXXQEV-UHFFFAOYSA-L dibromo(propan-2-yl)alumane Chemical compound [Br-].[Br-].CC(C)[Al+2] QXEHKWIXDXXQEV-UHFFFAOYSA-L 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- MGDOJPNDRJNJBK-UHFFFAOYSA-N ethylaluminum Chemical compound [Al].C[CH2] MGDOJPNDRJNJBK-UHFFFAOYSA-N 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- OIPWQYPOWLBLMR-UHFFFAOYSA-N hexylalumane Chemical compound CCCCCC[AlH2] OIPWQYPOWLBLMR-UHFFFAOYSA-N 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- XBKBZMOLSULOEA-UHFFFAOYSA-L methylaluminum(2+);dibromide Chemical compound C[Al](Br)Br XBKBZMOLSULOEA-UHFFFAOYSA-L 0.000 description 1
- YSTQWZZQKCCBAY-UHFFFAOYSA-L methylaluminum(2+);dichloride Chemical compound C[Al](Cl)Cl YSTQWZZQKCCBAY-UHFFFAOYSA-L 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- ZYTJPPRBIGGXRO-UHFFFAOYSA-N propan-2-ylalumane Chemical compound C(C)(C)[AlH2] ZYTJPPRBIGGXRO-UHFFFAOYSA-N 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- PWTBFUKGLHFIPA-UHFFFAOYSA-L tert-butylaluminum(2+);dibromide Chemical compound [Br-].[Br-].CC(C)(C)[Al+2] PWTBFUKGLHFIPA-UHFFFAOYSA-L 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Detergent Compositions (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Gas Separation By Absorption (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/016,855 US4191588A (en) | 1979-03-02 | 1979-03-02 | Method of cleaning fouled heat exchangers and other equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD149316A5 true DD149316A5 (de) | 1981-07-08 |
Family
ID=21779350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD80219356A DD149316A5 (de) | 1979-03-02 | 1980-02-29 | Verfahren zur reinigung verunreinigter waermeaustauscher und sonstiger fertigungseinrichtungen |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US4191588A (ro) |
| EP (1) | EP0016515B1 (ro) |
| JP (1) | JPS55128589A (ro) |
| KR (1) | KR830002240B1 (ro) |
| AU (1) | AU533412B2 (ro) |
| BR (1) | BR8000559A (ro) |
| CA (1) | CA1116058A (ro) |
| DD (1) | DD149316A5 (ro) |
| DE (1) | DE3061237D1 (ro) |
| ES (1) | ES8104551A1 (ro) |
| HU (1) | HU180331B (ro) |
| IL (1) | IL59260A (ro) |
| MX (1) | MX154155A (ro) |
| NO (1) | NO154020C (ro) |
| PT (1) | PT70812A (ro) |
| RO (1) | RO79800B (ro) |
| SU (1) | SU993806A3 (ro) |
| YU (1) | YU42207B (ro) |
| ZA (1) | ZA80459B (ro) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE35815E (en) * | 1986-07-07 | 1998-06-02 | Landry Service Company, Inc. | Method for treating waste material |
| US4897205A (en) * | 1987-09-21 | 1990-01-30 | Landry Service Co., Inc. | Method for treating waste material |
| US12510313B1 (en) * | 2025-07-23 | 2025-12-30 | Kuwait National Petroleum Company | Method of cleaning a cold box |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3256307A (en) * | 1960-10-31 | 1966-06-14 | Ethyl Corp | Manufacture of alkyl aluminum sesquihalides |
| BE628692A (ro) * | 1962-02-21 | |||
| US3651159A (en) * | 1968-09-03 | 1972-03-21 | Exxon Research Engineering Co | Bimetallic salts and derivatives thereof their preparation and use in the complexing of ligands |
| US3647843A (en) * | 1969-11-20 | 1972-03-07 | Tenneco Chem | Acetylene-cuprous aluminum tetrachloride complex and a process for its production |
| FR2138313A1 (en) * | 1971-05-24 | 1973-01-05 | Continental Oil Co | Treatment for cleaning and plating metal surfaces - using a soln of an organo-metallic cpd in a hydrocarbon solvent |
| US3857869A (en) * | 1973-03-27 | 1974-12-31 | Tenneco Chem | Process for the preparation of bimetallic salt complexes |
| US3856841A (en) * | 1973-03-28 | 1974-12-24 | Merkl George | Aluminum organoiodides |
| US4099984A (en) * | 1977-05-03 | 1978-07-11 | The Dow Chemical Company | Process for cleaning fouled heat exchangers |
-
1979
- 1979-03-02 US US06/016,855 patent/US4191588A/en not_active Expired - Lifetime
-
1980
- 1980-01-25 ZA ZA00800459A patent/ZA80459B/xx unknown
- 1980-01-29 IL IL59260A patent/IL59260A/xx unknown
- 1980-01-29 EP EP80300261A patent/EP0016515B1/en not_active Expired
- 1980-01-29 DE DE8080300261T patent/DE3061237D1/de not_active Expired
- 1980-01-30 BR BR8000559A patent/BR8000559A/pt unknown
- 1980-02-07 ES ES488325A patent/ES8104551A1/es not_active Expired
- 1980-02-08 PT PT70812A patent/PT70812A/pt unknown
- 1980-02-21 CA CA346,203A patent/CA1116058A/en not_active Expired
- 1980-02-26 MX MX181327A patent/MX154155A/es unknown
- 1980-02-28 SU SU802891057A patent/SU993806A3/ru active
- 1980-02-28 NO NO800567A patent/NO154020C/no unknown
- 1980-02-29 KR KR1019800000853A patent/KR830002240B1/ko not_active Expired
- 1980-02-29 DD DD80219356A patent/DD149316A5/de not_active IP Right Cessation
- 1980-02-29 AU AU56031/80A patent/AU533412B2/en not_active Ceased
- 1980-02-29 YU YU565/80A patent/YU42207B/xx unknown
- 1980-02-29 JP JP2420080A patent/JPS55128589A/ja active Granted
- 1980-03-01 RO RO100347A patent/RO79800B/ro unknown
- 1980-03-01 HU HU8080482A patent/HU180331B/hu unknown
Also Published As
| Publication number | Publication date |
|---|---|
| YU42207B (en) | 1988-06-30 |
| ES488325A0 (es) | 1981-04-16 |
| HU180331B (en) | 1983-02-28 |
| NO154020C (no) | 1986-07-02 |
| PT70812A (en) | 1980-03-01 |
| KR830002240B1 (ko) | 1983-10-20 |
| JPS5755795B2 (ro) | 1982-11-26 |
| AU5603180A (en) | 1980-09-04 |
| BR8000559A (pt) | 1980-10-29 |
| RO79800A (ro) | 1983-02-15 |
| RO79800B (ro) | 1983-02-28 |
| AU533412B2 (en) | 1983-11-24 |
| JPS55128589A (en) | 1980-10-04 |
| DE3061237D1 (en) | 1983-01-13 |
| ZA80459B (en) | 1981-07-29 |
| IL59260A (en) | 1983-05-15 |
| KR830001686A (ko) | 1983-05-18 |
| ES8104551A1 (es) | 1981-04-16 |
| MX154155A (es) | 1987-05-27 |
| SU993806A3 (ru) | 1983-01-30 |
| US4191588A (en) | 1980-03-04 |
| IL59260A0 (en) | 1980-05-30 |
| NO800567L (no) | 1980-09-03 |
| CA1116058A (en) | 1982-01-12 |
| NO154020B (no) | 1986-03-24 |
| YU56580A (en) | 1983-01-21 |
| EP0016515B1 (en) | 1982-12-08 |
| EP0016515A1 (en) | 1980-10-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ENJ | Ceased due to non-payment of renewal fee |