Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07F
ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
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9/00
Compounds containing elements of Groups 5 or 15 of the Periodic Table
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C07F9/547
Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
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C07F9/6564
having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms
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C07F9/6571
having phosphorus and oxygen atoms as the only ring hetero atoms
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C07F9/657109
esters of oxyacids of phosphorus in which one or more exocyclic oxygen atoms have been replaced by (a) sulfur atom(s)
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C07F9/657118
non-condensed with carbocyclic rings or heterocyclic rings or ring systems
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