Patent classifications
C
CHEMISTRY; METALLURGY
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C08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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C08K
Use of inorganic or non-macromolecular organic substances as compounding ingredients
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C08K5/49
Phosphorus-containing compounds
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C08K5/51
Phosphorus bound to oxygen
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C08K5/52
Phosphorus bound to oxygen only
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C08K5/529
Esters containing heterocyclic rings not representing cyclic esters of phosphoric or phosphorous acids
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