BE877919A - Cellule d'electrolyse et procede de production d'halogenes - Google Patents
Cellule d'electrolyse et procede de production d'halogenesInfo
- Publication number
- BE877919A BE877919A BE0/196478A BE196478A BE877919A BE 877919 A BE877919 A BE 877919A BE 0/196478 A BE0/196478 A BE 0/196478A BE 196478 A BE196478 A BE 196478A BE 877919 A BE877919 A BE 877919A
- Authority
- BE
- Belgium
- Prior art keywords
- production process
- electrolysis cell
- halogen production
- halogen
- electrolysis
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
- C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
- C25B9/73—Assemblies comprising two or more cells of the filter-press type
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT26171/78A IT1118243B (it) | 1978-07-27 | 1978-07-27 | Cella di elettrolisi monopolare |
Publications (1)
Publication Number | Publication Date |
---|---|
BE877919A true BE877919A (fr) | 1979-11-16 |
Family
ID=11218825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE0/196478A BE877919A (fr) | 1978-07-27 | 1979-07-26 | Cellule d'electrolyse et procede de production d'halogenes |
Country Status (8)
Country | Link |
---|---|
US (6) | US4343689A (fr) |
JP (1) | JPS5538991A (fr) |
BE (1) | BE877919A (fr) |
CA (1) | CA1189827A (fr) |
DE (1) | DE2930609A1 (fr) |
FR (1) | FR2433592B1 (fr) |
GB (1) | GB2032458B (fr) |
IT (1) | IT1118243B (fr) |
Families Citing this family (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1118243B (it) * | 1978-07-27 | 1986-02-24 | Elche Ltd | Cella di elettrolisi monopolare |
US4209368A (en) * | 1978-08-07 | 1980-06-24 | General Electric Company | Production of halogens by electrolysis of alkali metal halides in a cell having catalytic electrodes bonded to the surface of a porous membrane/separator |
GB2051870B (en) * | 1979-06-07 | 1983-04-20 | Asahi Chemical Ind | Method for electrolysis of aqueous alkali metal chloride solution |
US4217199A (en) * | 1979-07-10 | 1980-08-12 | Ppg Industries, Inc. | Electrolytic cell |
US4340452A (en) * | 1979-08-03 | 1982-07-20 | Oronzio deNora Elettrochimici S.p.A. | Novel electrolysis cell |
AU535261B2 (en) * | 1979-11-27 | 1984-03-08 | Asahi Glass Company Limited | Ion exchange membrane cell |
US4256554A (en) * | 1980-03-28 | 1981-03-17 | Energy Development Associates, Inc. | Electrolytic cell for separating chlorine gas from other gases |
IN156372B (fr) * | 1980-05-15 | 1985-07-06 | Ici Plc | |
JPS5729586A (en) * | 1980-07-28 | 1982-02-17 | Kanegafuchi Chem Ind Co Ltd | Electrolysis of alkali metal chloride |
FI72150C (fi) * | 1980-11-15 | 1987-04-13 | Asahi Glass Co Ltd | Alkalimetallkloridelektrolyscell. |
NL8104559A (nl) * | 1980-11-17 | 1982-06-16 | Ppg Industries Inc | Elektrolysecel met voor ionen doorlaatbaar membraan. |
JPS57174482A (en) * | 1981-03-24 | 1982-10-27 | Asahi Glass Co Ltd | Cation exchange membrane for electrolysis |
US4430179A (en) * | 1981-08-03 | 1984-02-07 | Olin Corporation | Portable method for filter press cell assembly |
DE3132947A1 (de) * | 1981-08-20 | 1983-03-03 | Uhde Gmbh, 4600 Dortmund | Elektrolysezelle |
US4439297A (en) * | 1981-10-01 | 1984-03-27 | Olin Corporation | Monopolar membrane electrolytic cell |
TR22530A (tr) * | 1981-11-24 | 1987-10-12 | Ici Plc | Elektrolitik pilde kullamilmaya mahsus elektrod yapisi ve bu elektrod yasini havi olan elektrolitik pil |
EP0080288B1 (fr) * | 1981-11-24 | 1987-10-07 | Imperial Chemical Industries Plc | Cellule électrolytique de type filter-press |
CA1171817A (fr) * | 1981-12-23 | 1984-07-31 | Electrolyser Corporation Ltd. (The) | Montage d'electrode pour pile d'electrolyse |
US4482448A (en) * | 1981-12-23 | 1984-11-13 | Noranda Inc. | Electrode structure for electrolyser cells |
DE3219704A1 (de) * | 1982-05-26 | 1983-12-01 | Uhde Gmbh, 4600 Dortmund | Membran-elektrolysezelle |
JPS5917762U (ja) * | 1982-07-22 | 1984-02-03 | クロリンエンジニアズ株式会社 | 電解用陽極 |
US4738763A (en) * | 1983-12-07 | 1988-04-19 | Eltech Systems Corporation | Monopolar, bipolar and/or hybrid membrane cell |
US4923582A (en) * | 1982-12-27 | 1990-05-08 | Eltech Systems Corporation | Monopolar, bipolar and/or hybrid memberane cell |
US4561959A (en) * | 1983-12-09 | 1985-12-31 | The Dow Chemical Company | Flat-plate electrolytic cell |
US4588483A (en) * | 1984-07-02 | 1986-05-13 | Olin Corporation | High current density cell |
US4687558A (en) * | 1984-07-02 | 1987-08-18 | Olin Corporation | High current density cell |
EP0185269A1 (fr) * | 1984-12-17 | 1986-06-25 | The Dow Chemical Company | Cellule électrochimique fabriquée intégralement |
US4602984A (en) * | 1984-12-17 | 1986-07-29 | The Dow Chemical Company | Monopolar electrochemical cell having a novel electric current transmission element |
EP0185270A1 (fr) * | 1984-12-17 | 1986-06-25 | The Dow Chemical Company | Procédé de fabrication d'un élément unitaire de transmission de courant électrique pour un assemblage de cellules électrochimiques du type filtre-presse monopolaire ou bipolaire |
US4654136A (en) * | 1984-12-17 | 1987-03-31 | The Dow Chemical Company | Monopolar or bipolar electrochemical terminal unit having a novel electric current transmission element |
US4755272A (en) * | 1986-05-02 | 1988-07-05 | The Dow Chemical Company | Bipolar electrochemical cell having novel means for electrically connecting anode and cathode of adjacent cell units |
IT1202425B (it) * | 1987-01-26 | 1989-02-09 | Giuseppe Bianchi | Processo elettrochimico di deossigenazione per il controllo della corrosione in acque deionizzate |
US5041197A (en) * | 1987-05-05 | 1991-08-20 | Physical Sciences, Inc. | H2 /C12 fuel cells for power and HCl production - chemical cogeneration |
DE3726674A1 (de) * | 1987-08-11 | 1989-02-23 | Heraeus Elektroden | Elektrodenstruktur fuer elektrochemische zellen |
US5045171A (en) * | 1988-04-05 | 1991-09-03 | Ionics, Incorporated | Acid efficient membrane for use in electrodialysis for recovery of acid |
DE3918378A1 (de) * | 1989-06-06 | 1990-12-13 | Juergen Dr Mueller | Ausfuehrungsform und betriebsart einer gasdiffusionselektrode zur elektrochemischen gewinnung von wertstoffen aus waessrigen loesungen |
US5221452A (en) * | 1990-02-15 | 1993-06-22 | Asahi Glass Company Ltd. | Monopolar ion exchange membrane electrolytic cell assembly |
US5254233A (en) * | 1990-02-15 | 1993-10-19 | Asahi Glass Company Ltd. | Monopolar ion exchange membrane electrolytic cell assembly |
GB9224372D0 (en) * | 1992-11-20 | 1993-01-13 | Ici Plc | Electrolytic cell and electrode therefor |
US5334300A (en) * | 1992-12-08 | 1994-08-02 | Osmotek, Inc. | Turbulent flow electrodialysis cell |
BR9302093A (pt) * | 1993-05-28 | 1994-11-29 | Nora Pemelec Do Brasil S A De | Processo de eletrólise de cloro-álcalis |
US5961795A (en) * | 1993-11-22 | 1999-10-05 | E. I. Du Pont De Nemours And Company | Electrochemical cell having a resilient flow field |
IT1273492B (it) * | 1995-02-03 | 1997-07-08 | Solvay | Cassone d'estremita' di un elettrodializzatore,elettrodializzatore munito di un tale cassone e utilizzazione di detto elettrodializzatore |
JP2911381B2 (ja) * | 1995-03-01 | 1999-06-23 | 神鋼パンテツク株式会社 | 水素・酸素発生装置 |
US5653857A (en) * | 1995-11-29 | 1997-08-05 | Oxteh Systems, Inc. | Filter press electrolyzer electrode assembly |
DE19544585C1 (de) * | 1995-11-30 | 1997-06-26 | Dornier Gmbh | Elektrolyseur mit flüssigem Elektrolyten |
US6051117A (en) * | 1996-12-12 | 2000-04-18 | Eltech Systems, Corp. | Reticulated metal article combining small pores with large apertures |
US5928710A (en) * | 1997-05-05 | 1999-07-27 | Wch Heraeus Elektrochemie Gmbh | Electrode processing |
JPH11106977A (ja) * | 1997-09-30 | 1999-04-20 | Asahi Glass Co Ltd | 複極型イオン交換膜電解槽 |
GB9814123D0 (en) * | 1998-07-01 | 1998-08-26 | British Gas Plc | Electrochemical fuel cell |
DE19837641C2 (de) * | 1998-08-19 | 2000-11-02 | Siemens Ag | Verfahren zum Routen von Verbindungen über ein paketorientiertes Kommunikationsnetz |
DE10138214A1 (de) * | 2001-08-03 | 2003-02-20 | Bayer Ag | Elektrolysezelle und Verfahren zur elektrochemischen Herstellung von Chlor |
ITMI20031269A1 (it) * | 2003-06-24 | 2004-12-25 | De Nora Elettrodi Spa | Nuovo anodo espandibile per celle a diaframma. |
US7901213B1 (en) * | 2006-05-02 | 2011-03-08 | Acco Brands Usa Llc | Erasable marker screen assembly |
EP2066830A1 (fr) * | 2006-09-29 | 2009-06-10 | Uhdenora S.p.A | Cellule électrolytique |
BRPI0701653A2 (pt) * | 2007-05-23 | 2009-01-13 | Inur S A | cÉlula eletrolÍtica e equipamento eletrolisador |
US20100158822A1 (en) * | 2008-12-18 | 2010-06-24 | E .I. Du Pont De Nemours And Company | Peptides that bind to silica-coated particles |
US8882972B2 (en) | 2011-07-19 | 2014-11-11 | Ecolab Usa Inc | Support of ion exchange membranes |
BR112019009761A2 (pt) * | 2016-11-15 | 2019-08-13 | Giner Life Sciences Inc | autorregulação de gerador de gás eletrolítico e sistema de implante compreendendo o mesmo |
WO2019222704A1 (fr) | 2018-05-17 | 2019-11-21 | Giner Life Sciences, Inc. | Générateur de gaz électrolytique doté de bornes de fil et d'orifice de gaz combinées |
JP7424134B2 (ja) * | 2020-03-17 | 2024-01-30 | 三菱マテリアル株式会社 | 複合チタン部材、および、水電解用電極、水電解装置 |
Family Cites Families (54)
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US1152772A (en) * | 1915-01-25 | 1915-09-07 | Kimberly Clark Company | Cathode for electrolytic cells. |
US3017338A (en) * | 1958-03-03 | 1962-01-16 | Diamond Alkali Co | Electrolytic process and apparatus |
NL240441A (fr) * | 1958-06-27 | |||
US3134697A (en) * | 1959-11-03 | 1964-05-26 | Gen Electric | Fuel cell |
NL266652A (fr) * | 1960-07-11 | |||
BE643700A (fr) * | 1963-03-22 | 1964-08-12 | ||
US3344053A (en) * | 1964-05-04 | 1967-09-26 | Dow Chemical Co | Chlorine cell |
US3446725A (en) * | 1966-02-25 | 1969-05-27 | Allis Chalmers Mfg Co | Electrolysis cell |
GB1268182A (en) * | 1968-04-03 | 1972-03-22 | Ici Ltd | Electrolytic cell |
US3674676A (en) * | 1970-02-26 | 1972-07-04 | Diamond Shamrock Corp | Expandable electrodes |
US3989615A (en) * | 1971-07-06 | 1976-11-02 | Nippon Soda Company Limited | Diaphragm process electrolytic cell |
US3910827A (en) * | 1971-07-07 | 1975-10-07 | Ppg Industries Inc | Diaphragm cell |
US3941675A (en) * | 1971-09-28 | 1976-03-02 | Friedrich Uhde Gmbh | Bipolar multiple electrolytic cell comprising a diaphragm and electrode for same |
DE2148337A1 (de) * | 1971-09-28 | 1973-04-05 | Uhde Gmbh Friedrich | Bipolare mehrfach-elektrolysezelle mit diaphragma |
BE793045A (fr) * | 1971-12-21 | 1973-06-20 | Rhone Progil | Electrodes bipolaires |
US3773634A (en) * | 1972-03-09 | 1973-11-20 | Diamond Shamrock Corp | Control of an olyte-catholyte concentrations in membrane cells |
US3873437A (en) * | 1972-11-09 | 1975-03-25 | Diamond Shamrock Corp | Electrode assembly for multipolar electrolytic cells |
US3981790A (en) * | 1973-06-11 | 1976-09-21 | Diamond Shamrock Corporation | Dimensionally stable anode and method and apparatus for forming the same |
US3871988A (en) * | 1973-07-05 | 1975-03-18 | Hooker Chemicals Plastics Corp | Cathode structure for electrolytic cell |
GB1473527A (en) * | 1973-10-24 | 1977-05-11 | Kernforschungsanlage Juelich | Electrode suitable for the generation of hydrogen peroxide |
DE2503652A1 (de) * | 1974-02-04 | 1975-08-07 | Diamond Shamrock Corp | Zelle fuer die chloralkalielektrolyse |
US3928166A (en) * | 1974-03-01 | 1975-12-23 | Diamond Shamrock Corp | Dimensionally adjustable anode-dimensionally stable diaphragm combination for electrolytic cells |
GB1487284A (en) * | 1974-03-09 | 1977-09-28 | Asahi Chemical Ind | Electrolysis |
DE2448187A1 (de) * | 1974-10-09 | 1976-04-22 | Hooker Chemicals Plastics Corp | Elektrolysezelle |
US3932197A (en) * | 1974-12-18 | 1976-01-13 | Union Technologies Corporation | Method for catalyzing a fuel cell electrode and an electrode so produced |
US3993653A (en) * | 1974-12-31 | 1976-11-23 | Commissariat A L'energie Atomique | Cell for electrolysis of steam at high temperature |
US4024036A (en) * | 1975-02-03 | 1977-05-17 | Agency Of Industrial Science & Technology | Proton permselective solid-state member and apparatus utilizing said permselective member |
JPS51119681A (en) * | 1975-04-15 | 1976-10-20 | Asahi Glass Co Ltd | A cell frame for an electrolizer |
US4124477A (en) * | 1975-05-05 | 1978-11-07 | Hooker Chemicals & Plastics Corp. | Electrolytic cell utilizing pretreated semi-permeable membranes |
US4033849A (en) * | 1975-05-09 | 1977-07-05 | Diamond Shamrock Corporation | Electrode and apparatus for forming the same |
JPS5275666A (en) * | 1975-12-19 | 1977-06-24 | Mitsui Eng & Shipbuild Co Ltd | Electrode for electrolysis |
US4026785A (en) * | 1975-12-22 | 1977-05-31 | Olin Corporation | Adjustable electrode |
US4056452A (en) * | 1976-02-26 | 1977-11-01 | Billings Energy Research Corporation | Electrolysis apparatus |
US4057479A (en) * | 1976-02-26 | 1977-11-08 | Billings Energy Research Corporation | Solid polymer electrolyte cell construction |
GB1545702A (en) * | 1976-03-22 | 1979-05-10 | Diamond Shamrock Corp | Electrodialytic production of sols |
US4013537A (en) * | 1976-06-07 | 1977-03-22 | The B. F. Goodrich Company | Electrolytic cell design |
GB1581347A (en) * | 1976-08-04 | 1980-12-10 | Ici Ltd | Resilient anodes |
DE2741956A1 (de) * | 1976-09-20 | 1978-03-23 | Gen Electric | Elektrolyse von natriumsulfat unter verwendung einer ionenaustauschermembranzelle mit festelektrolyt |
GB1533904A (en) * | 1976-11-12 | 1978-11-29 | Ici Ltd | Diaphragm cells |
US4105514A (en) * | 1977-06-27 | 1978-08-08 | Olin Corporation | Process for electrolysis in a membrane cell employing pressure actuated uniform spacing |
US4177116A (en) * | 1977-06-30 | 1979-12-04 | Oronzio DeNora Implanti Elettrochimici S.p.A. | Electrolytic cell with membrane and method of operation |
IT1114623B (it) * | 1977-07-01 | 1986-01-27 | Oronzio De Nora Impianti | Cella elettrolitica monopolare a diaframma |
GB2007260B (en) * | 1977-09-22 | 1982-02-24 | Kanegafuchi Chemical Ind | Method of electrolysis of alkai metal chloride |
US4101410A (en) * | 1977-09-26 | 1978-07-18 | Olin Corporation | Electrode assembly with flexible gas baffle conductor |
US4096054A (en) * | 1977-10-26 | 1978-06-20 | Olin Corporation | Riserless flexible electrode assembly |
US4210501A (en) * | 1977-12-09 | 1980-07-01 | General Electric Company | Generation of halogens by electrolysis of hydrogen halides in a cell having catalytic electrodes bonded to a solid polymer electrolyte |
US4191618A (en) * | 1977-12-23 | 1980-03-04 | General Electric Company | Production of halogens in an electrolysis cell with catalytic electrodes bonded to an ion transporting membrane and an oxygen depolarized cathode |
CA1140891A (fr) * | 1978-01-03 | 1983-02-08 | General Electric Company | Pile electrolytique a membrane garnie d'electrodes a projections divergentes |
IT1118243B (it) * | 1978-07-27 | 1986-02-24 | Elche Ltd | Cella di elettrolisi monopolare |
US4247376A (en) * | 1979-01-02 | 1981-01-27 | General Electric Company | Current collecting/flow distributing, separator plate for chloride electrolysis cells utilizing ion transporting barrier membranes |
US4253922A (en) * | 1979-02-23 | 1981-03-03 | Ppg Industries, Inc. | Cathode electrocatalysts for solid polymer electrolyte chlor-alkali cells |
US4340452A (en) * | 1979-08-03 | 1982-07-20 | Oronzio deNora Elettrochimici S.p.A. | Novel electrolysis cell |
US4444632A (en) * | 1979-08-03 | 1984-04-24 | Oronzio Denora Impianti Elettrochimici S.P.A. | Electrolysis cell |
IT1122699B (it) * | 1979-08-03 | 1986-04-23 | Oronzio De Nora Impianti | Collettore elettrico resiliente e cella elettrochimica ad elettrolita solido comprendente lo stesso |
-
1978
- 1978-07-27 IT IT26171/78A patent/IT1118243B/it active
-
1979
- 1979-07-12 US US06/057,255 patent/US4343689A/en not_active Expired - Lifetime
- 1979-07-18 GB GB7924984A patent/GB2032458B/en not_active Expired
- 1979-07-19 JP JP9104179A patent/JPS5538991A/ja active Granted
- 1979-07-24 CA CA000332470A patent/CA1189827A/fr not_active Expired
- 1979-07-26 BE BE0/196478A patent/BE877919A/fr not_active IP Right Cessation
- 1979-07-26 FR FR7919346A patent/FR2433592B1/fr not_active Expired
- 1979-07-27 DE DE19792930609 patent/DE2930609A1/de active Granted
-
1980
- 1980-05-20 US US06/151,695 patent/US4341604A/en not_active Expired - Lifetime
-
1983
- 1983-10-13 US US06/541,554 patent/US4536263A/en not_active Expired - Lifetime
-
1985
- 1985-09-06 US US06/773,378 patent/US4663003A/en not_active Expired - Lifetime
- 1985-10-23 US US06/790,328 patent/US4592822A/en not_active Expired - Lifetime
-
1986
- 1986-11-20 US US06/933,037 patent/US4789443A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4663003A (en) | 1987-05-05 |
US4592822A (en) | 1986-06-03 |
US4341604A (en) | 1982-07-27 |
US4789443A (en) | 1988-12-06 |
DE2930609A1 (de) | 1980-02-14 |
DE2930609C2 (fr) | 1990-03-29 |
CA1189827A (fr) | 1985-07-02 |
GB2032458B (en) | 1982-11-03 |
JPS6341992B2 (fr) | 1988-08-19 |
IT1118243B (it) | 1986-02-24 |
IT7826171A0 (it) | 1978-07-27 |
US4536263A (en) | 1985-08-20 |
FR2433592B1 (fr) | 1986-05-23 |
US4343689A (en) | 1982-08-10 |
JPS5538991A (en) | 1980-03-18 |
FR2433592A1 (fr) | 1980-03-14 |
GB2032458A (en) | 1980-05-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: DE NORA PERMELEC S.P.A. Effective date: 19960731 |