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.) (63) six-membered hetero ring consists of oxygen, nitrogen and carbon (e.g., 1,2-oxazines, etc) (98) 1,4-oxazines (106) morpholines (i.e., fully hydrogenated 1,4-oxazines (170) oxygen attched directly or indirectly to morpholine ring by nonionic bonding

Hierarchy/Derived subclasses

544 / 1-> 63-> 98-> 106-> 170-> 171-> 172
     -> 173-> 174
     -> 175-> 176
     -> 177

uspto searches

Patent Apps in 544/170

Granted Patents in 544/170

Use the links above or do an advanced search in ppubs for:
(544/170.ccls. or 544/171.ccls. or 544/172.ccls. or 544/173.ccls. or 544/174.ccls. or 544/175.ccls. or 544/176.ccls. or 544/177.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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