Subclass Subgroup Patent
C10B 47/22 12545840
C10G 9/40 12545841
  29/22 12545842
  33/04 12545843
  47/20 12545844
  47/22 12545845
C10L 1/02 12545846
  3/101 12545847
  10/02 12545848
  10/04 12545849
C10M 171/04 12545850