| Patents for C25B 13 - Diaphragms; Spacing elements (2,681) |
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| 08/15/1978 | US4107049 Exposing polyacrylonitrile or acrylonitrile copolymer film or fiber and gaseous organic to glow or corona discharge |
| 08/15/1978 | US4107005 Process for electrolysing sodium chloride or hydrochloric acid, an and electrolytic cell, employing trifluorostyrene sulfonic acid membrane |
| 08/15/1978 | CA1036344A1 Ion exchange fabrics |
| 08/08/1978 | US4105533 Electrodialysis cell and method for producing cationic permeable membranes used therein |
| 07/11/1978 | US4100113 Electrolytic cell membrane and method of preparation by plasma polymerization of polyamide or polytetrafluoroethylene thin films onto polymeric substrates |
| 07/04/1978 | US4098930 Impregnation of web with solution of copolymer of acrylonitrile in dmf, coagulation in water |
| 07/04/1978 | US4098672 Porous diaphragms |
| 06/06/1978 | US4093568 Process for production of perfluorocarbon type cation exchange membrane |
| 06/06/1978 | US4093533 Crocidolite and chrysotile |
| 05/23/1978 | US4090931 Anode-structure for electrolysis |
| 05/16/1978 | US4089759 Heat treatment of a copolymer of tetrafluoroethylene and sulfonyl fluoride |
| 05/16/1978 | US4089758 Electrolytic process |
| 04/18/1978 | US4085071 Ion exchange polymer film, consisting of fluorinated polymer with N-monosubstituted sulfonamido groups method and apparatus for electrolysis of alkali or alkaline earth metal halide |
| 03/28/1978 | US4081350 Diaphragms for use in the electrolysis of alkali metal chlorides |
| 03/28/1978 | US4081349 Polyamine modified membranes and chlor-alkali electrolysis cells employing same |
| 03/07/1978 | US4077885 Granular inert layer of silicon dioxide or carbon black |
| 02/14/1978 | US4073752 High normality ion exchange membranes containing entrapped electrostatically bulky multicharged ions and method of production |
| 01/24/1978 | US4070257 Electrolytic process using novel diaphragm |
| 01/03/1978 | US4066519 Cell and process for electrolyzing aqueous solutions using a porous metal separator |
| 12/27/1977 | US4065534 Method of providing a resin reinforced asbestos diaphragm |
| 12/27/1977 | US4065366 Process for producing alkali metal hydroxide |
| 12/13/1977 | US4062753 Hydrolyzed copolymer of tetrafluoroethylene-sulfonated perfluorovinyl ether |
| 12/06/1977 | US4061821 Semipermeable composite membranes |
| 12/06/1977 | US4061550 Process for electrolysis |
| 11/29/1977 | US4060473 Sulfonated |
| 11/01/1977 | US4056447 Electrolyzing alkali metal chlorides using resin bonded asbestos diaphragm |
| 10/25/1977 | US4055476 Precipitation of nickel values |
| 09/27/1977 | US4051002 Cation-exchange membrane, copolymer of ethylene and unsaturated carboxylic acid or salt |
| 09/06/1977 | US4046665 Electrode assembly for diaphragm cells |
| 09/06/1977 | US4046654 Process for desalination with chlor-alkali production in a mercury diaphragm cell |
| 08/16/1977 | US4042359 Alkali borosilicate glass, silicon dioxide, boron oxide |
| 08/09/1977 | US4040919 In a three-compartment cell, increasing anolyte acidity, diluting electrolyte, reducing current density |
| 07/19/1977 | US4036729 Diaphragms from discrete thermoplastic fibers requiring no bonding or cementing |
| 07/19/1977 | US4036728 Matting and "nafion" layers to reduce porosity |
| 07/12/1977 | US4035459 Process for spinning dry-fiber cellulose acetate hollow fiber membranes |
| 06/28/1977 | US4032423 Method of assembling a bipolar electrolyzer |
| 06/21/1977 | US4031041 Cloth comprising asbestos fibers and method of producing said cloth |
| 06/21/1977 | US4031000 Diaphragm for electrolytic production of caustic alkali |
| 06/21/1977 | US4030988 Process for producing halogen and metal hydroxides with cation exchange membranes of improved permselectivity |
| 06/14/1977 | US4029582 Poly(arylether-sulfone) semipermeable membrane comprising substituted halomethyl and/or quaternary nitrogen groups |
| 05/31/1977 | US4026783 Electrolysis cell using cation exchange membranes of improved permselectivity |
| 05/24/1977 | US4025405 Electrolytic production of high purity alkali metal hydroxide |
| 05/17/1977 | US4024036 Proton permselective solid-state member and apparatus utilizing said permselective member |
| 05/03/1977 | US4021327 Reinforced cation permeable separator |
| 04/26/1977 | US4020235 Novel composite diaphragm material |
| 03/29/1977 | US4014775 Electrolysis of brines |
| 03/22/1977 | US4013535 Electrolyte separator tensioning device |
| 03/15/1977 | US4012541 Immersing polytetrafluoroethylene in solvent, surfactant and brine |
| 03/15/1977 | US4012303 Trifluorostyrene sulfonic acid membranes |
| 01/18/1977 | US4003818 Method of obtaining a micro-porous membrane and novel product thus obtained |
| 12/28/1976 | US4000057 Electrolytic cell membrane conditioning |
| 12/07/1976 | US3996318 Dynamic membrane |
| 12/07/1976 | US3996141 Catalysis of hydrogen peroxide to hydrogen and oxygen |
| 11/30/1976 | US3994860 Process for improving the shrinkage resistance upon-drying membranes of sulphonated polyaryl ether by immersing the membrane in an aqueous solution of an inorganic salt of a carbonylated or hydroxylated lower carboxylic acid |
| 11/16/1976 | US3992495 Method of manufacturing a semipermeable membrane from a water-soluble polymeric resin |
| 11/09/1976 | US3991251 Treatment of asbestos diaphragms and resulting diaphragm |
| 11/02/1976 | US3989615 Diaphragm process electrolytic cell |
| 10/12/1976 | US3985631 Pretreatment and start-up of electrolytic cell membranes |
| 09/14/1976 | US3980613 Method of manufacturing electrolysis cell diaphragms |
| 09/14/1976 | US3980544 Chlorine and caustic soda from alkali metal chloride |
| 09/07/1976 | US3979276 Silicate treated asbestos diaphragms for electrolytic cells |
| 08/24/1976 | US3976549 Electrolysis method |
| 07/20/1976 | US3970516 Multiple filter press diaphragm former |
| 07/20/1976 | US3970041 Apparatus for depositing fibrous diaphragms |
| 07/13/1976 | US3969285 Heat-treated fluorocarbon sulfonylamine cation permselectivity |
| 06/29/1976 | US3966576 Electrophoretic deposition of asbestos diaphragms |
| 06/08/1976 | US3962212 Phosphorylated cellulose ester membrane for use in separation or concentration of substances |
| 06/01/1976 | US3960697 Diaphragm cell having uniform and minimum spacing between the anodes and cathodes |
| 06/01/1976 | US3960651 Reinforced air-pervious polytetrafluorothylene sheet |
| 05/04/1976 | US3954579 Electrolytic method for the simultaneous manufacture of concentrated and dilute aqueous hydroxide solutions |
| 04/13/1976 | US3950257 Acrylonitrile-vinyl copolymers, solvents |
| 04/13/1976 | US3950255 Supported semi-permeable membranes |
| 04/06/1976 | US3948781 Selectively permeable membrane on hollow cord |
| 03/23/1976 | US3945910 Asbestos, fibrils of polyvinylidene fluoride, alkali metal halides |
| 03/16/1976 | US3944477 Diaphragm for electrolytic cell for chlorine production |
| 03/02/1976 | US3940916 Knitted or woven ion exchange fabric containing low denier filaments |
| 02/17/1976 | US3939055 Laminated asbestos diaphragm |
| 01/20/1976 | US3933653 Membranes of acrylonitrile polymers for ultrafilter and method for producing the same |
| 01/13/1976 | US3932208 Method of making silicate treated asbestos diaphragms for electrolytic cells |
| 01/06/1976 | US3930979 Porous diaphragms |
| 01/06/1976 | US3930886 Porous fluoro-carbon polymer matrices |