USPC Class Details

Description: 544 organic compounds -- part of the class 532-570 series / 544 organic compounds -- part of the class 532-570 series/() organic compounds (class 532, subclass 1) () heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen as the only ring hetero atoms (class 540, subclass 1) (1) hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) (3) six-membered hetero ring consists of sulfur, nitrogen, and carbon (14) polycyclo ring system having the six-membered hetero ring as one of the cyclos (32) tricyclo ring system having the six-membered hetero ring as one of the cyclos (35) phenothiazines (including hydrogenated) (38) carbon bonded directly to ring nitrogen of phenothiazine ring system

Hierarchy/Derived subclasses

544 / 1-> 3-> 14-> 32-> 35-> 38-> 39-> 40
      -> 41-> 42-> 43
        -> 44-> 45
        -> 46

uspto searches

Patent Apps in 544/38

Granted Patents in 544/38

Use the links above or do an advanced search in ppubs for:
(544/38.ccls. or 544/39.ccls. or 544/40.ccls. or 544/41.ccls. or 544/42.ccls. or 544/43.ccls. or 544/44.ccls. or 544/45.ccls. or 544/46.ccls.)

This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.
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