NL8602500A - Werkwijze ter bereiding van zeer vloeibare overbasische toevoegsels met hogere basiciteit en samenstelling, die deze toevoegsels bevat. - Google Patents
Werkwijze ter bereiding van zeer vloeibare overbasische toevoegsels met hogere basiciteit en samenstelling, die deze toevoegsels bevat. Download PDFInfo
- Publication number
- NL8602500A NL8602500A NL8602500A NL8602500A NL8602500A NL 8602500 A NL8602500 A NL 8602500A NL 8602500 A NL8602500 A NL 8602500A NL 8602500 A NL8602500 A NL 8602500A NL 8602500 A NL8602500 A NL 8602500A
- Authority
- NL
- Netherlands
- Prior art keywords
- process according
- oil
- overbased
- additives
- alkaline earth
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims description 22
- 239000000654 additive Substances 0.000 title claims description 21
- 239000007788 liquid Substances 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 48
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 38
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 26
- 239000003513 alkali Substances 0.000 claims description 24
- 239000003921 oil Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 239000001569 carbon dioxide Substances 0.000 claims description 19
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 16
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 14
- 239000001099 ammonium carbonate Substances 0.000 claims description 14
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 14
- 229910052749 magnesium Inorganic materials 0.000 claims description 13
- 239000011777 magnesium Substances 0.000 claims description 13
- 229910021529 ammonia Inorganic materials 0.000 claims description 12
- 239000003085 diluting agent Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 239000008096 xylene Substances 0.000 claims description 11
- 239000004215 Carbon black (E152) Substances 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- 229930195733 hydrocarbon Natural products 0.000 claims description 8
- 150000002430 hydrocarbons Chemical class 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 150000001341 alkaline earth metal compounds Chemical class 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000000295 fuel oil Substances 0.000 claims description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 4
- -1 alkylbenzene sulfonate Chemical class 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 239000011541 reaction mixture Substances 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- 150000008055 alkyl aryl sulfonates Chemical group 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 2
- 235000019270 ammonium chloride Nutrition 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 239000010690 paraffinic oil Substances 0.000 claims description 2
- 239000003849 aromatic solvent Substances 0.000 claims 1
- 239000010689 synthetic lubricating oil Substances 0.000 claims 1
- 239000000047 product Substances 0.000 description 17
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 150000001342 alkaline earth metals Chemical class 0.000 description 7
- 239000000395 magnesium oxide Substances 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 229940092714 benzenesulfonic acid Drugs 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000012429 reaction media Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 125000001273 sulfonato group Chemical class [O-]S(*)(=O)=O 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 239000003039 volatile agent Substances 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003747 fuel oil additive Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- XZYHDXZNNDZXSR-UHFFFAOYSA-N n-(1,1-dioxothiolan-3-yl)-n-methyl-2-[(4-phenyl-5-pyridin-4-yl-1,2,4-triazol-3-yl)sulfanyl]acetamide Chemical compound N=1N=C(C=2C=CN=CC=2)N(C=2C=CC=CC=2)C=1SCC(=O)N(C)C1CCS(=O)(=O)C1 XZYHDXZNNDZXSR-UHFFFAOYSA-N 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N phosphonic acid group Chemical group P(O)(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 238000003918 potentiometric titration Methods 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
- C10M159/24—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing sulfonic radicals
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
- Liquid Carbonaceous Fuels (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8514664 | 1985-10-03 | ||
| FR8514664A FR2588269B1 (fr) | 1985-10-03 | 1985-10-03 | Procede de preparation d'additifs surbases tres fluides et a basicite elevee et composition contenant lesdits additifs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8602500A true NL8602500A (nl) | 1987-05-04 |
Family
ID=9323493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8602500A NL8602500A (nl) | 1985-10-03 | 1986-10-03 | Werkwijze ter bereiding van zeer vloeibare overbasische toevoegsels met hogere basiciteit en samenstelling, die deze toevoegsels bevat. |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4749499A (de) |
| JP (1) | JPS6296598A (de) |
| BE (1) | BE905532A (de) |
| DE (1) | DE3633763A1 (de) |
| FR (1) | FR2588269B1 (de) |
| GB (1) | GB2181150B (de) |
| IT (1) | IT1197322B (de) |
| NL (1) | NL8602500A (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2588270B1 (fr) * | 1985-10-03 | 1988-02-05 | Elf France | Procede de preparation d'un additif pour les huiles lubrifiantes, l'additif ainsi obtenu et une composition lubrifiante renfermant ledit additif |
| FR2616441B1 (fr) * | 1987-06-11 | 1990-03-23 | Elf France | Procede de preparation d'additifs surbases et compositions renfermant lesdits additifs |
| US4880550A (en) * | 1988-08-26 | 1989-11-14 | Amoco Corporation | Preparation of high base calcium sulfonates |
| US4929373A (en) * | 1989-10-10 | 1990-05-29 | Texaco Inc. | Process for preparing overbased calcium sulfonates |
| US5223163A (en) * | 1992-03-18 | 1993-06-29 | Mobil Oil Corporation | Metal phenates |
| FR2698018B1 (fr) * | 1992-11-18 | 1995-01-20 | Inst Francais Du Petrole | Produits colloïdaux renfermant du bore, et/ou du soufre, et/ou du phosphore, leur préparation et leur utilisation comme additifs pour lubrifiants. |
| GB9900035D0 (en) * | 1999-01-04 | 1999-02-24 | Infineum Uk Ltd | Overbased metal detergents |
| DE69908098T2 (de) * | 1999-06-10 | 2004-04-08 | Chevron Chemical S.A. | Erdalkalimetalsulfonate, ihre Verwendung als Schmierölzusatz und Herstellungsmethode |
| KR20240021861A (ko) * | 2021-06-10 | 2024-02-19 | 셰브런 오로나이트 컴퍼니 엘엘씨 | 아민 증강 세제 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3658703A (en) * | 1969-10-07 | 1972-04-25 | Phillips Petroleum Co | Overbasing petroleum sulfonate additives for lubricating oils |
| GB1399092A (en) * | 1971-05-27 | 1975-06-25 | Cooper & Co Ltd Edwin | Lubricant additives |
| GB1483904A (en) * | 1973-10-12 | 1977-08-24 | Lubrizol Corp | Barium-containing dispersions and processes for producing them |
| GB1483460A (en) * | 1974-07-01 | 1977-08-17 | Witco Chemical Corp | Process for preparing highly-basic magnesium-containing dispersion |
| GB1594699A (en) * | 1977-06-14 | 1981-08-05 | Cooper & Co Ltd Edwin | Overbased alkaline earth metal hydrocarbyl sulphonate |
| US4192758A (en) * | 1978-05-01 | 1980-03-11 | Bray Oil Company, Inc. | Overbased magnesium sulfonate process |
| FR2429831A2 (fr) * | 1978-06-26 | 1980-01-25 | Orogil | Nouveau procede de preparation de detergents-dispersants de haute alcalinite pour huiles lubrifiantes |
| GB2037309A (en) * | 1978-12-13 | 1980-07-09 | Exxon Research Engineering Co | Prearation of basic magnesium sulphonates |
| US4347147A (en) * | 1980-09-04 | 1982-08-31 | Nalco Chemical Company | Process for preparing overbased magnesium sulfonates |
| US4435301A (en) * | 1982-04-19 | 1984-03-06 | Standard Oil Company, (Indiana) | Preparation of overbased magnesium phenates |
| FR2529225B1 (fr) * | 1982-06-24 | 1986-04-25 | Orogil | Nouvel additif detergent-dispersant metallique de haute alcalinite pour huiles lubrifiantes |
| FR2529224B1 (fr) * | 1982-06-24 | 1986-02-07 | Orogil | Nouvel additif detergent-dispersant suralcalinise pour huiles lubrifiantes |
-
1985
- 1985-10-03 FR FR8514664A patent/FR2588269B1/fr not_active Expired
-
1986
- 1986-09-30 US US06/913,540 patent/US4749499A/en not_active Expired - Fee Related
- 1986-10-01 BE BE0/217239A patent/BE905532A/fr not_active IP Right Cessation
- 1986-10-02 GB GB8623650A patent/GB2181150B/en not_active Expired
- 1986-10-02 IT IT21874/86A patent/IT1197322B/it active
- 1986-10-02 JP JP61235437A patent/JPS6296598A/ja active Pending
- 1986-10-03 NL NL8602500A patent/NL8602500A/nl not_active Application Discontinuation
- 1986-10-03 DE DE19863633763 patent/DE3633763A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US4749499A (en) | 1988-06-07 |
| IT1197322B (it) | 1988-11-30 |
| FR2588269A1 (fr) | 1987-04-10 |
| BE905532A (fr) | 1987-02-02 |
| FR2588269B1 (fr) | 1988-02-05 |
| GB2181150A (en) | 1987-04-15 |
| JPS6296598A (ja) | 1987-05-06 |
| IT8621874A0 (it) | 1986-10-02 |
| DE3633763A1 (de) | 1987-04-09 |
| GB2181150B (en) | 1989-10-04 |
| GB8623650D0 (en) | 1986-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BV | The patent application has lapsed |