KemaNord AB

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4678653 Process for preparing chlorine dioxideExpiredApr 23, 85Jul 07, 87[C01B]
4678654 Process for production of chlorine dioxideExpiredApr 23, 85Jul 07, 87[C01B]
4530825 Process for the production of silicon nitrideExpiredApr 12, 84Jul 23, 85[C01B]
4513106 Process for expanding microspheresExpiredNov 22, 83Apr 23, 85[C08J]
4483889 Method for the production of fibre composite materials impregnated with resinExpiredAug 02, 83Nov 20, 84[B05D]
4451585 Resin-impregnated fibre composite materials and a process for their manufactureExpiredJun 09, 82May 29, 84[C08J]
4435209 Process for the preparation of silicon or ferrosiliconExpiredMar 31, 82Mar 06, 84[C01B, C21C]
4432825 Method of making foam composite material impregnated with resinExpiredSep 13, 82Feb 21, 84[B32B]
4422909 Electrolytic process for the manufacture of alkali metal halateExpiredDec 27, 81Dec 27, 83[C25B]
4397799 Process for drying and expanding microspheresExpiredDec 18, 81Aug 09, 83[B29D]
4362778 Foam composite material impregnated with resinExpiredMay 05, 81Dec 07, 82[B32B]
4332648 Electrolytic apparatus for the manufacture of alkali metal halateExpiredApr 28, 80Jun 01, 82[C25B]
4332659 Electrolytic apparatus for the manufacture of alkali metal halateExpiredDec 17, 79Jun 01, 82[C25B]
4326941 Electrolytic cellExpiredJun 23, 80Apr 27, 82[C25B]
4288286 Kraft mill recycle processExpiredMar 03, 80Sep 08, 81[D21C]
4269620 Process for the preparation of silicon or ferrosiliconExpiredMay 24, 79May 26, 81[C21C]
4216195 Production of chlorine dioxide having low chlorine contentExpiredMay 19, 78Aug 05, 80[C01B]
4206193 Versatile process for generating chlorine dioxideExpiredDec 18, 78Jun 03, 80[C01B]

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