NO843970L - Fremgangsmaate og middel til aa inhibere korrosjon paa metaller i saltopploesninger - Google Patents
Fremgangsmaate og middel til aa inhibere korrosjon paa metaller i saltopploesningerInfo
- Publication number
- NO843970L NO843970L NO843970A NO843970A NO843970L NO 843970 L NO843970 L NO 843970L NO 843970 A NO843970 A NO 843970A NO 843970 A NO843970 A NO 843970A NO 843970 L NO843970 L NO 843970L
- Authority
- NO
- Norway
- Prior art keywords
- corrosion
- salt
- test
- phosphonium
- salt solutions
- Prior art date
Links
- 238000005260 corrosion Methods 0.000 title claims description 72
- 230000007797 corrosion Effects 0.000 title claims description 72
- 239000012266 salt solution Substances 0.000 title claims description 41
- 238000000034 method Methods 0.000 title claims description 18
- 229910052751 metal Inorganic materials 0.000 title claims description 11
- 239000002184 metal Substances 0.000 title claims description 11
- 150000002739 metals Chemical class 0.000 title claims description 9
- 150000004714 phosphonium salts Chemical class 0.000 claims description 24
- 239000012190 activator Substances 0.000 claims description 19
- 239000003112 inhibitor Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- SOIFLUNRINLCBN-UHFFFAOYSA-N ammonium thiocyanate Chemical group [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 claims description 10
- 230000002401 inhibitory effect Effects 0.000 claims description 8
- -1 triphenyldocosyl chloride Chemical compound 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 4
- 125000000304 alkynyl group Chemical group 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 3
- 150000001450 anions Chemical group 0.000 claims description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- SXTBDUBWAKNGPI-UHFFFAOYSA-N 22,22,22-triphenyldocosylphosphanium;chloride Chemical compound [Cl-].C=1C=CC=CC=1C(C=1C=CC=CC=1)(CCCCCCCCCCCCCCCCCCCCC[PH3+])C1=CC=CC=C1 SXTBDUBWAKNGPI-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- TVDSBUOJIPERQY-UHFFFAOYSA-N prop-2-yn-1-ol Chemical compound OCC#C TVDSBUOJIPERQY-UHFFFAOYSA-N 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Inorganic materials 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000012085 test solution Substances 0.000 description 3
- 150000003751 zinc Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000012496 blank sample Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 150000002891 organic anions Chemical class 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- MTJIWEMEADUTEW-UHFFFAOYSA-N 16,16,16-triphenylhexadecylphosphanium;chloride Chemical compound [Cl-].C=1C=CC=CC=1C(C=1C=CC=CC=1)(CCCCCCCCCCCCCCC[PH3+])C1=CC=CC=C1 MTJIWEMEADUTEW-UHFFFAOYSA-N 0.000 description 1
- TWMBHZQTUGBTKL-UHFFFAOYSA-N 22,22,22-triphenyldocosylphosphanium;bromide Chemical compound [Br-].C=1C=CC=CC=1C(C=1C=CC=CC=1)(CCCCCCCCCCCCCCCCCCCCC[PH3+])C1=CC=CC=C1 TWMBHZQTUGBTKL-UHFFFAOYSA-N 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910014033 C-OH Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910014570 C—OH Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001347 alkyl bromides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- RBRXPPLNXDVMKG-GMFCBQQYSA-M bis(2-hydroxyethyl)-methyl-[(z)-octadec-9-enyl]azanium;chloride Chemical compound [Cl-].CCCCCCCC\C=C/CCCCCCCC[N+](C)(CCO)CCO RBRXPPLNXDVMKG-GMFCBQQYSA-M 0.000 description 1
- DLDJFQGPPSQZKI-UHFFFAOYSA-N but-2-yne-1,4-diol Chemical compound OCC#CCO DLDJFQGPPSQZKI-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 150000003567 thiocyanates Chemical class 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-M toluene-4-sulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-M 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 125000002088 tosyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C([H])([H])[H])S(*)(=O)=O 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/167—Phosphorus-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
-
- 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
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/939—Corrosion inhibitor
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/538,451 US4640786A (en) | 1983-10-03 | 1983-10-03 | Phosphonium salt-containing corrosion inhibitors for high density brines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO843970L true NO843970L (no) | 1985-04-09 |
Family
ID=24146990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO843970A NO843970L (no) | 1983-10-03 | 1984-10-02 | Fremgangsmaate og middel til aa inhibere korrosjon paa metaller i saltopploesninger |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4640786A (da) |
| EP (1) | EP0139260A1 (da) |
| DK (1) | DK463084A (da) |
| GR (1) | GR80513B (da) |
| IL (1) | IL73108A0 (da) |
| NO (1) | NO843970L (da) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951921A (en) * | 1997-01-31 | 1999-09-14 | Core Corporation | Apparatus for producing ozone water |
| GB0324238D0 (en) * | 2003-10-16 | 2003-11-19 | Rhodia Consumer Specialities L | Formulation for corrosion and scale inhibition |
| US7994101B2 (en) * | 2006-12-12 | 2011-08-09 | Halliburton Energy Services, Inc. | Corrosion inhibitor intensifier compositions and associated methods |
| US8070962B2 (en) * | 2007-02-24 | 2011-12-06 | M-I L.L.C. | Using oxidizing agents to remove thiocyanates from brines |
| US8058211B2 (en) * | 2007-12-12 | 2011-11-15 | Halliburton Energy Services, Inc. | Corrosion inhibitor intensifier compositions and associated methods |
| US7994099B2 (en) * | 2009-04-14 | 2011-08-09 | Haliburton Energy Services, Inc. | Corrosion inhibitor compositions comprising an aldehyde and a thiol and/or an amine functionalized ring structure and associated methods |
| US20100305010A1 (en) * | 2009-05-28 | 2010-12-02 | Clearwater International, Llc | High density phosphate brines and methods for making and using same |
| US8936728B2 (en) | 2010-08-31 | 2015-01-20 | Debra A. Riggs | Chemicals for oil spill cleanup |
| GB201400299D0 (en) * | 2014-01-08 | 2014-02-26 | Rhodia Operations | Corrosion inhibitors |
| WO2016092011A1 (en) | 2014-12-11 | 2016-06-16 | Clariant International Ltd | Liquid inhibitor composition and a method for its preparation and application as a heavy brine corrosion control |
| US10519360B2 (en) | 2014-12-11 | 2019-12-31 | Clariant International Ltd. | Liquid inhibitor composition and a method for its preparation and application as a heavy brine corrosion control |
| US10611951B2 (en) | 2014-12-11 | 2020-04-07 | Clariant International Ltd. | Liquid inhibitor composition and a method for its preparation and application as a heavy brine corrosion control |
| ES2842600T3 (es) | 2016-12-01 | 2021-07-14 | Clariant Int Ltd | Uso de una composición que contiene al menos un compuesto de azúcar-amida biodegradable en combinación con al menos un agente sinérgico basado en azufre para inhibir la corrosión de un equipo metálico en aplicaciones de campos de petróleo |
| CN110105390B (zh) * | 2019-05-20 | 2021-09-21 | 河南大学 | 烷基三苯基鏻双三氟甲烷磺酰亚胺离子液体、合成方法及作为镁合金材料缓蚀剂的应用 |
| CN118085845B (zh) * | 2024-02-26 | 2025-02-18 | 山东滨州昱诚化工科技有限公司 | 一种酸化压裂用缓蚀剂及其制备方法 |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2340996A (en) * | 1944-02-08 | Coating composition | ||
| US1921364A (en) * | 1928-05-21 | 1933-08-08 | Ig Farbenindustrie Ag | Media for protecting furs, hairs, feathers, and animal textile products against the attack of animal and plant pests |
| US2073413A (en) * | 1936-11-25 | 1937-03-09 | Cross Roy | Drilling fluids |
| US2224695A (en) * | 1938-11-25 | 1940-12-10 | Carl F Prutton | Inhibitor |
| US2265759A (en) * | 1939-06-06 | 1941-12-09 | Shell Dev | Oil well treating fluid |
| US2360623A (en) * | 1941-03-01 | 1944-10-17 | Standard Oil Dev Co | Lubricating oil composition |
| US3060156A (en) * | 1959-12-01 | 1962-10-23 | American Cyanamid Co | Polymeric sulfonium salts |
| US3165513A (en) * | 1961-12-26 | 1965-01-12 | Dal Mon Research Co | Triazine phosphonium derivatives |
| BE634515A (da) * | 1962-07-19 | |||
| US3334144A (en) * | 1964-07-21 | 1967-08-01 | Monsanto Res Corp | Process for making alkyltriaryl-phosphonium compounds |
| US3664807A (en) * | 1966-09-26 | 1972-05-23 | Petrolite Corp | Use of phosphonium compounds as corrosion inhibitors |
| US3531514A (en) * | 1966-09-26 | 1970-09-29 | Petrolite Corp | Phosphonium compounds and/or ethylene glycol - bis-(trialkylphosphonium acetates) |
| US3380837A (en) * | 1966-11-02 | 1968-04-30 | American Cyanamid Co | Corrosion inhibiting composition |
| US3654300A (en) * | 1966-11-25 | 1972-04-04 | Petrolite Corp | Imidazoline phosphoramides |
| US3591330A (en) * | 1966-11-25 | 1971-07-06 | Petrolite Corp | Use of phosphoramides as corrosion inhibitors |
| US3790487A (en) * | 1971-11-05 | 1974-02-05 | Chevron Res | Erosion-inhibited functional fluids |
| US4117236A (en) * | 1972-10-24 | 1978-09-26 | Petrolite Corporation | Phosphonium compounds |
| US4060553A (en) * | 1976-05-10 | 1977-11-29 | Petrolite Corporation | Hydroxyalkylaminoalkylamides and preparation and uses thereof |
| US4100100A (en) * | 1977-03-28 | 1978-07-11 | The Dow Chemical Company | Cobalt-containing inhibitor for sour gas conditioning solutions |
| US4100099A (en) * | 1977-03-28 | 1978-07-11 | The Dow Chemical Company | Quaternary salt-polyamine inhibitor for sour gas conditioning solutions |
| US4102804A (en) * | 1977-03-28 | 1978-07-25 | The Dow Chemical Company | Inhibitor for gas conditioning solutions |
| US4304677A (en) * | 1978-09-05 | 1981-12-08 | The Dow Chemical Company | Method of servicing wellbores |
| US4292183A (en) * | 1978-12-13 | 1981-09-29 | Great Lakes Chemical Corporation | High-density fluid compositions |
| US4427556A (en) * | 1980-10-14 | 1984-01-24 | Nl Industries, Inc. | Dispersible hydrophilic polymer compositions |
| US4536302A (en) * | 1983-06-30 | 1985-08-20 | Nl Industries Inc | Corrosion inhibition of aqueous brines |
-
1983
- 1983-10-03 US US06/538,451 patent/US4640786A/en not_active Expired - Fee Related
-
1984
- 1984-09-26 IL IL73108A patent/IL73108A0/xx unknown
- 1984-09-27 DK DK463084A patent/DK463084A/da not_active Application Discontinuation
- 1984-10-01 GR GR80513A patent/GR80513B/el unknown
- 1984-10-02 EP EP84111765A patent/EP0139260A1/en not_active Withdrawn
- 1984-10-02 NO NO843970A patent/NO843970L/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GR80513B (en) | 1985-02-01 |
| US4640786A (en) | 1987-02-03 |
| IL73108A0 (en) | 1984-12-31 |
| EP0139260A1 (en) | 1985-05-02 |
| DK463084D0 (da) | 1984-09-27 |
| DK463084A (da) | 1985-04-04 |
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