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Home › CoO Free black spinel ceramic pigment containing NiO, Fe.sub.2 O.sub.3 and Cr.sub.2 O.sub.3

CoO Free black spinel ceramic pigment containing NiO, Fe.sub.2 O.sub.3 and Cr.sub.2 O.sub.3

US Patent 4205996 · Granted Jun 3, 1980

Estimated economic value: $2,294,000 ⓘ

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