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Mukunda, Hanasoge Suryanarayana Avadani and Dasappa, Srinivasaiah and Paul, Palkat Joseph and Subbukrishna, Dibbur Nagesh Rao and Rajan, Nagamangala Krishnaiyengar Sriranga (2004) A Novel Process and Appratus for the manufacture of precipitated silica from rice husk ash. Patent Number(s) WO 2004073600 A2. Patent Assignee(s) Indian Institute of Science.