USPC Class Details

Description: 540 organic compounds -- part of the class 532-570 series / 540 organic compounds -- part of the class 532-570 series/() organic compounds (class 532, subclass 1) (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 (2) cyclopentanohydrophenanthrene ring system containing (6) spiro (15) the cyclopentanohydrophenanthrene ring system is part of a polycyclo ring system having at least five cyclos (16) hetero ring is one of the cyclos of the polycyclo ring system (17) the hetero ring is five-membered, consisting of one oxygen and four carbons, and shares the spiro atom with a six-membered oxygen containing hetero ring (e.g., sapogenins, etc.) (19) chalcogen bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system (e.g., hecogenin, etc.)

Hierarchy/Derived subclasses

540 / 1-> 2-> 6-> 15-> 16-> 17-> 19

uspto searches

Patent Apps in 540/19

Granted Patents in 540/19

Use the links above or do an advanced search in ppubs for:
(540/19.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.
Display:

Back