Patent classifications
C
CHEMISTRY; METALLURGY
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C11
ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
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C11B
PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
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13/00
Recovery of fats, fatty oils or fatty acids from waste materials
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C11B13/005
of residues of the fabrication of wood-cellulose (in particular tall-oil)
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