USPC Class Details

Description: 62 refrigeration / 62 refrigeration/(600) cryogenic treatment of gas or gas mixture (617) separation of gas mixture (640) air (643) distillation (648) downstream operation (649) flowline expansion engine (650) high pressure nitrogen

Hierarchy/Derived subclasses

62 / 600

-> 617

-> 640

-> 643

-> 648

-> 649

-> 650

uspto searches

Patent Apps in 62/650

Granted Patents in 62/650

Use the links above or do an advanced search in ppubs for:
(62/650.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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