ORONZIO DENORA IMPIANTI ELECTROCHIMICI, S.P.A., A CORP OF ITALY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Filing Date Issue/Pub Date Intl Class
4,832,805 Multi-layer structure for electrode membrane-assembly and electrolysis process using sameNov 16, 82May 23, 89[C25B]
4,772,364 Production of halogens by electrolysis of alkali metal halides in an electrolysis cell having catalytic electrodes bonded to the surface of a solid polymer electrolyte membraneMay 27, 80Sep 20, 88[C25B]
4,749,452 Multi-layer electrode membrane-assembly and electrolysis process using sameDec 30, 81Jun 07, 88[C25B]
4,569,735 Production of halogens by electrolysis of alkali metal halides in an electrolysis cell having catalytic electrodes bonded to the surface of a solid polymer electrolyte membraneDec 23, 83Feb 11, 86[C25B]
4,457,823 Thermally stabilized reduced platinum oxide electrocatalystJan 19, 81Jul 03, 84[C25C, C25B]
4,455,210 Multi layer ion exchanging membrane with protected interior hydroxyl ion rejection layerNov 03, 82Jun 19, 84[C25B]
4,402,806 Multi layer ion exchanging membrane with protected interior hydroxyl ion rejection layerMar 04, 82Sep 06, 83[C25B]
4,389,298 Novel bipolar electrode elementMay 26, 81Jun 21, 83[C25B]
4,371,433 Apparatus for reduction of shunt current in bipolar electrochemical cell assembliesOct 14, 80Feb 01, 83[H01M, C25B]
4,360,416 Anode catalysts for electrolysis of brineApr 27, 81Nov 23, 82[C25B]
4,333,805 Halogen evolution with improved anode catalystApr 27, 81Jun 08, 82[C25B]
4,311,568 Anode for reducing oxygen generation in the electrolysis of hydrogen chlorideApr 02, 80Jan 19, 82[C25B]
4,294,671 High temperature and low feed acid concentration operation of HCl electrolyzer having unitary membrane electrode structureMay 14, 80Oct 13, 81[C25B]
4,276,146 Cell having catalytic electrodes bonded to a membrane separatorDec 07, 79Jun 30, 81[C25B]
4,247,376 Current collecting/flow distributing, separator plate for chloride electrolysis cells utilizing ion transporting barrier membranesJan 02, 79Jan 27, 81[C25B]
4,224,121 Production of halogens by electrolysis of alkali metal halides in an electrolysis cell having catalytic electrodes bonded to the surface of a solid polymer electrolyte membraneJul 06, 78Sep 23, 80[C25B]
4,214,958 Electrolysis of alkali metal halides in a three-compartment cell with a pressurized buffer compartmentMay 14, 79Jul 29, 80[C25B]
4,212,714 Electrolysis of alkali metal halides in a three compartment cell with self-pressurized buffer compartmentMay 14, 79Jul 15, 80[C25B]
4,210,501 Generation of halogens by electrolysis of hydrogen halides in a cell having catalytic electrodes bonded to a solid polymer electrolyteJul 06, 78Jul 01, 80[C25B]
4,209,368 Production of halogens by electrolysis of alkali metal halides in a cell having catalytic electrodes bonded to the surface of a porous membrane/separatorAug 07, 78Jun 24, 80[C25B]

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