SE431533B - Forfarande och komposition for att inhibera bildning av pannsten i vattenbaserat medium - Google Patents
Forfarande och komposition for att inhibera bildning av pannsten i vattenbaserat mediumInfo
- Publication number
- SE431533B SE431533B SE7905174A SE7905174A SE431533B SE 431533 B SE431533 B SE 431533B SE 7905174 A SE7905174 A SE 7905174A SE 7905174 A SE7905174 A SE 7905174A SE 431533 B SE431533 B SE 431533B
- Authority
- SE
- Sweden
- Prior art keywords
- acid
- copolymer
- water
- styrene sulfonic
- organophosphonic
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 23
- 239000000203 mixture Substances 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 13
- 230000002401 inhibitory effect Effects 0.000 title claims description 9
- 239000000796 flavoring agent Substances 0.000 title 1
- 235000019634 flavors Nutrition 0.000 title 1
- 229920001577 copolymer Polymers 0.000 claims description 47
- 239000002253 acid Substances 0.000 claims description 27
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 claims description 26
- 150000003839 salts Chemical class 0.000 claims description 25
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 24
- 239000000654 additive Substances 0.000 claims description 17
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 14
- 125000004432 carbon atom Chemical group C* 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 7
- 238000009835 boiling Methods 0.000 claims description 7
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 6
- 239000012736 aqueous medium Substances 0.000 claims description 6
- -1 carbon-phosphorus compound Chemical class 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 6
- 239000011976 maleic acid Substances 0.000 claims description 6
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002609 medium Substances 0.000 claims description 4
- 125000002947 alkylene group Chemical group 0.000 claims description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims 1
- 150000002505 iron Chemical class 0.000 claims 1
- 235000002639 sodium chloride Nutrition 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000004575 stone Substances 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 3
- QQVDJLLNRSOCEL-UHFFFAOYSA-N (2-aminoethyl)phosphonic acid Chemical compound [NH3+]CCP(O)([O-])=O QQVDJLLNRSOCEL-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- MJPWXCPGHYETKV-UHFFFAOYSA-N (3-hydroxy-1-phosphonopropyl)phosphonic acid Chemical compound OCCC(P(O)(O)=O)P(O)(O)=O MJPWXCPGHYETKV-UHFFFAOYSA-N 0.000 description 1
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- GLULCKCBVYGUDD-UHFFFAOYSA-N 2-phosphonobutane-1,1,1-tricarboxylic acid Chemical compound CCC(P(O)(O)=O)C(C(O)=O)(C(O)=O)C(O)=O GLULCKCBVYGUDD-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000001414 amino alcohols Chemical class 0.000 description 1
- XDIJWRHVEDUFGP-UHFFFAOYSA-N azanium;2-phenylethenesulfonate Chemical compound [NH4+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 XDIJWRHVEDUFGP-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- XQRLCLUYWUNEEH-UHFFFAOYSA-N diphosphonic acid Chemical compound OP(=O)OP(O)=O XQRLCLUYWUNEEH-UHFFFAOYSA-N 0.000 description 1
- MSJMDZAOKORVFC-UAIGNFCESA-L disodium maleate Chemical compound [Na+].[Na+].[O-]C(=O)\C=C/C([O-])=O MSJMDZAOKORVFC-UAIGNFCESA-L 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 1
- GATNOFPXSDHULC-UHFFFAOYSA-N ethylphosphonic acid Chemical compound CCP(O)(O)=O GATNOFPXSDHULC-UHFFFAOYSA-N 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- MBKDYNNUVRNNRF-UHFFFAOYSA-N medronic acid Chemical compound OP(O)(=O)CP(O)(O)=O MBKDYNNUVRNNRF-UHFFFAOYSA-N 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- QIFCIFLDTQJGHQ-UHFFFAOYSA-M potassium;2-phenylethenesulfonate Chemical compound [K+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 QIFCIFLDTQJGHQ-UHFFFAOYSA-M 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- ATLPLEZDTSBZQG-UHFFFAOYSA-N propan-2-ylphosphonic acid Chemical compound CC(C)P(O)(O)=O ATLPLEZDTSBZQG-UHFFFAOYSA-N 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- WGRULTCAYDOGQK-UHFFFAOYSA-M sodium;sodium;hydroxide Chemical compound [OH-].[Na].[Na+] WGRULTCAYDOGQK-UHFFFAOYSA-M 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91571378A | 1978-06-15 | 1978-06-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7905174L SE7905174L (sv) | 1979-12-16 |
| SE431533B true SE431533B (sv) | 1984-02-13 |
Family
ID=25436161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7905174A SE431533B (sv) | 1978-06-15 | 1979-06-12 | Forfarande och komposition for att inhibera bildning av pannsten i vattenbaserat medium |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS551897A (forum.php) |
| CA (1) | CA1114978A (forum.php) |
| DE (1) | DE2923718A1 (forum.php) |
| ES (1) | ES481476A1 (forum.php) |
| FR (1) | FR2431999A1 (forum.php) |
| GB (1) | GB2023121B (forum.php) |
| IT (1) | IT1121786B (forum.php) |
| SE (1) | SE431533B (forum.php) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT71647B (en) * | 1979-08-16 | 1982-01-21 | Calgon Corp | Process for preparing a composition for the control of scale and deposits in gas-liquid separation |
| US4306991A (en) | 1979-09-18 | 1981-12-22 | Chemed Corporation | Scale inhibition |
| CA1151498A (en) * | 1979-10-23 | 1983-08-09 | Dearborn Chemicals Ltd. | Treatment of aqueous systems |
| DE3230291A1 (de) * | 1981-08-18 | 1983-03-03 | Dearborn Chemicals Ltd., Widnes, Cheshire | Zusammensetzung zur verhinderung von kesselstein in waessrigen systemen |
| US4409192A (en) * | 1982-04-26 | 1983-10-11 | Betz Laboratories, Inc. | Gas scrubbing methods |
| JPS58199877A (ja) * | 1982-05-03 | 1983-11-21 | ナルコ・ケミカル・カンパニ− | 鉄金属の腐蝕防止用組成物及び方法 |
| US4581145A (en) * | 1982-09-27 | 1986-04-08 | Dearborn Chemical Company | Composition and method for inhibiting scale |
| CA1207211A (en) * | 1982-09-27 | 1986-07-08 | Dionisio G. Cuisia | Composition and method for inhibiting scale |
| CA1224999A (en) * | 1983-02-16 | 1987-08-04 | Dionisio G. Cuisia | Composition and method for inhibiting scale |
| US4556493A (en) * | 1983-02-16 | 1985-12-03 | Dearborn Chemical Company | Composition and method for inhibiting scale |
| US4576722A (en) * | 1983-02-22 | 1986-03-18 | The Mogul Corporation | Scale and sludge compositions for aqueous systems |
| EP0210590A3 (en) * | 1983-03-07 | 1988-02-17 | Calgon Corporation | Polymeric additives for water |
| GB8311002D0 (en) * | 1983-04-22 | 1983-05-25 | Unilever Plc | Detergent compositions |
| JPS63176871A (ja) * | 1987-01-17 | 1988-07-21 | Daihatsu Motor Co Ltd | トランスミツシヨンの潤滑装置 |
| DE19514272C2 (de) * | 1995-04-21 | 1997-02-20 | Amtra Aquaristik Gmbh | Mittel und Verfahren zur Regulierung der Härte und des pH-Wertes des Wassers von Süßwasseraquarien |
| EP0785174A1 (en) * | 1996-01-22 | 1997-07-23 | Monsanto Europe S.A./N.V. | Use of triaminophosphonates in cement |
| US6310031B1 (en) | 1999-11-30 | 2001-10-30 | Amway Corporation | Method of inhibiting soil redeposition |
| CN107973425A (zh) * | 2017-12-13 | 2018-05-01 | 攀枝花钢城集团瑞天安全环保有限公司 | 复合缓蚀阻垢剂及其制备方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3549538A (en) * | 1967-06-22 | 1970-12-22 | Nalco Chemical Co | Scale inhibition and removal in steam generation |
| GB1414918A (en) * | 1973-02-14 | 1975-11-19 | Ciba Geigy Uk Ltd | Treatment of water to prevent the deposition of scale |
| US3890228A (en) * | 1973-04-13 | 1975-06-17 | Chemed Corp | Polyacrylate-polyphosphonic acid treatment in aqueous systems |
| GB1519512A (en) * | 1974-06-10 | 1978-07-26 | Grace W R & Co | Watertreatment process |
| JPS5175681A (ja) * | 1974-12-26 | 1976-06-30 | Chemed Corp | Mizujunkankeinitaisuru horiakurirusan hosupponsanshoriho |
| CA1062983A (en) * | 1975-09-08 | 1979-09-25 | Joseph J. Schuck | Copolymers for the control of the formation and deposition of materials in aqueous mediums |
| JPS5827349B2 (ja) * | 1975-11-25 | 1983-06-08 | 栗田工業株式会社 | 水系における腐食防止組成物 |
| SE435456B (sv) * | 1976-01-07 | 1984-10-01 | Calgon Corp | Komposition och forfarande for att kontrollera uppbyggnaden av pannsten i gastvettare |
| GB1539974A (en) * | 1976-11-10 | 1979-02-07 | Ciba Geigy Ag | Method of inhibiting corrosion and scaling of metals in contact with water |
| US4048066A (en) * | 1976-11-17 | 1977-09-13 | Chemed Corporation | Method of inhibiting scale |
-
1979
- 1979-05-30 CA CA328,648A patent/CA1114978A/en not_active Expired
- 1979-06-11 IT IT23459/79A patent/IT1121786B/it active
- 1979-06-12 ES ES481476A patent/ES481476A1/es not_active Expired
- 1979-06-12 DE DE19792923718 patent/DE2923718A1/de not_active Ceased
- 1979-06-12 FR FR7915042A patent/FR2431999A1/fr active Granted
- 1979-06-12 SE SE7905174A patent/SE431533B/sv not_active IP Right Cessation
- 1979-06-12 JP JP7314479A patent/JPS551897A/ja active Granted
- 1979-06-15 GB GB7920922A patent/GB2023121B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1121786B (it) | 1986-04-23 |
| ES481476A1 (es) | 1980-07-01 |
| JPS551897A (en) | 1980-01-09 |
| SE7905174L (sv) | 1979-12-16 |
| FR2431999B1 (forum.php) | 1985-05-10 |
| CA1114978A (en) | 1981-12-22 |
| FR2431999A1 (fr) | 1980-02-22 |
| JPS6152760B2 (forum.php) | 1986-11-14 |
| GB2023121A (en) | 1979-12-28 |
| GB2023121B (en) | 1982-08-25 |
| DE2923718A1 (de) | 1979-12-20 |
| IT7923459A0 (it) | 1979-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
Ref document number: 7905174-4 Effective date: 19890725 Format of ref document f/p: F |