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

Hierarchy/Derived subclasses

540 / 1-> 2-> 6-> 7-> 8-> 9
    -> 10
    -> 11
    -> 12-> 13
     -> 14
   -> 15-> 16-> 17-> 18
      -> 19
      -> 20-> 21
      -> 22
     -> 23
     -> 24
     -> 25-> 26
     -> 27
   -> 28-> 29
    -> 30
    -> 31-> 32
     -> 33
     -> 34-> 35
      -> 36
      -> 37
      -> 38
      -> 39
      -> 40
    -> 41-> 42
     -> 43
     -> 44
    -> 45
    -> 46

uspto searches

Patent Apps in 540/6

Granted Patents in 540/6

Use the links above or do an advanced search in ppubs for:
(540/6.ccls. or 540/7.ccls. or 540/8.ccls. or 540/9.ccls. or 540/10.ccls. or 540/11.ccls. or 540/12.ccls. or 540/13.ccls. or 540/14.ccls. or 540/15.ccls. or 540/16.ccls. or 540/17.ccls. or 540/18.ccls. or 540/19.ccls. or 540/20.ccls. or 540/21.ccls. or 540/22.ccls. or 540/23.ccls. or 540/24.ccls. or 540/25.ccls. or 540/26.ccls. or 540/27.ccls. or 540/28.ccls. or 540/29.ccls. or 540/30.ccls. or 540/31.ccls. or 540/32.ccls. or 540/33.ccls. or 540/34.ccls. or 540/35.ccls. or 540/36.ccls. or 540/37.ccls. or 540/38.ccls. or 540/39.ccls. or 540/40.ccls. or 540/41.ccls. or 540/42.ccls. or 540/43.ccls. or 540/44.ccls. or 540/45.ccls. or 540/46.ccls.)

At about 35 search terms the uspto will give you this error "Too many search terms" The 35th term is bold.

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