Organic Compound Containing Patents (Class 252/388)
- Phosphorus containing (Class 252/389.2)
- Silicon containing (Class 252/389.3)
- Boron containing (Class 252/389.4)
- Chromium containing (Class 252/389.5)
- Lead containing (Class 252/389.51)
- Zinc or aluminium containing (Class 252/389.52)
- Nickel, iron, cobalt, copper, manganese, mercury, or cadmium containing (Class 252/389.53)
- Molybdenum, arsenic, antimony, vanadium, bismuth, tungsten, selenium, or tellurium containing (Class 252/389.54)
- Group IIA metal containing (Class 252/389.61)
- Alkali metal or NH4+ containing (Class 252/389.62)