Sulfur Or Compound Thereof Patents (Class 423/511)
- Persulfate (Class 423/513)
- Thiosulfate (Class 423/514)
- Dithionite (Class 423/515)
- Metal and ammonium containing (Class 423/517)
- Plural metal containing (Class 423/518)
- Bisulfite (Class 423/519)
- Sulfite (Class 423/519.2)
- Ternary compound containing hydrogen (Class 423/521)
- Sulfur trioxide (Class 423/532)
- Sulfur dioxide (Class 423/539)
- Sulfate (Class 423/544)
- Polysulfide (Class 423/562)
- Hydrogen sulfide (Class 423/563)
- Utilizing free sulfur as reactant (Class 423/565)
- Utilizing sulfate or sulfuric acid as reactant (Class 423/566)
- Sulfide of Cd, Zn, or Hg (Class 423/566.1)
- Sulfide of alkali metal (Class 423/566.2)
- Sulfide of alkaline earth metal (Class 423/566.3)