Blue Circle Industries Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4849128 Process and composition for conditioning an aqueous systemExpiredApr 30, 84Jul 18, 89[B01J, B01F, C02F, B01D]
4741776 Method of processing waste materialsExpiredJul 30, 85May 03, 88[C04B, C21F]
4382911 Hydration of limeExpiredJan 04, 79May 10, 83[C01F]
4336142 Removal of heavy metals with gamma dicalcium silicateExpiredMar 04, 81Jun 22, 82[C02F]
4295933 Producing dispersions of preflocculated fillers for use in papermakingExpiredApr 03, 80Oct 20, 81[D21H]
4272297 Compositions for use with papermaking fillersExpiredSep 19, 79Jun 09, 81[C09C]
4264212 Static mixerExpiredMay 14, 79Apr 28, 81[B28C, B01F]

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