SCM Chemicals Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4891204 Purification of aluminum chlorideExpiredAug 20, 86Jan 02, 90[C01F]
4624843 Recovery of chlorineExpiredJun 10, 85Nov 25, 86[C01G]
4619815 Chlorination of iron-containing metaliferous materialExpiredSep 30, 85Oct 28, 86[C01G]
4576636 Process for beneficiating oxidic oresExpiredFeb 17, 81Mar 18, 86[C01G]
4519987 Treatment of oxidic materialsExpiredSep 12, 83May 28, 85[C01G, C01F]
4487747 Production of metal chloridesExpiredMay 05, 83Dec 11, 84[C22B]
4455288 Arrangement for the entrainment of particulate materialsExpiredNov 20, 81Jun 19, 84[C01G]
4448609 Process for the production of aqueous dispersions of pigmentary titanium dioxideExpiredMar 25, 82May 15, 84[C08J, C09C]
4288650 Electrical insulation deviceExpiredMar 20, 79Sep 08, 81[H05H]
4284879 Methods of containing fluids deleterious to the containerExpiredJun 14, 79Aug 18, 81[H01H]
4279640 Process for upgrading iron-containing materialsExpiredJan 31, 80Jul 21, 81[C22B]
4246022 Processing metal chloridesExpiredApr 16, 79Jan 20, 81[C22B]
4224080 Method of treating inorganic oxide pigmentsExpiredOct 10, 78Sep 23, 80[C09C]
4223206 Method and apparatus for electrically heating corrosive vaporsExpiredJan 25, 78Sep 16, 80[F24H, H05B]
4203871 Method of making lead and bismuth ruthenate and iridate pyrochlore compoundsExpiredNov 01, 78May 20, 80[H01B]

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