USPC Class Details

Description: 546 organic compounds -- part of the class 532-570 series / 546 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 consisting of one nitrogen and five carbons (26) polycyclo ring system having the six-membered hetero ring as one of the cyclos (79) tricyclo ring system having the six-membered hetero ring as one of the cyclos (80) plural ring hetero atoms in the tricyclo ring system (81) plural ring nitrogens in the tricyclo ring system (82) three or more ring hetero atoms in the tricyclo ring system

Hierarchy/Derived subclasses

546 / 1-> 26-> 79-> 80-> 81-> 82-> 83

uspto searches

Patent Apps in 546/82

Granted Patents in 546/82

Use the links above or do an advanced search in ppubs for:
(546/82.ccls. or 546/83.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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