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Roasting of titaniferous materials
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Patent number 5,900,040
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Issue date May 4, 1999
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RGC Mineral Sands Limited
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Harold Robert Harris
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2098136
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Patent number 2,098,136
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Issue date Nov 2, 1937
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F27 - FURNACES KILNS OVENS RETORTS
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2083887
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Issue date Jun 15, 1937
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F27 - FURNACES KILNS OVENS RETORTS
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1793499
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Patent number 1,793,499
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Issue date Feb 24, 1931
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F27 - FURNACES KILNS OVENS RETORTS
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1708705
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Patent number 1,708,705
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Issue date Apr 9, 1929
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F27 - FURNACES KILNS OVENS RETORTS