F23J2211/40 - CPC Classification Index

ClassID:

156815 ⎘

F23J2211/40 - CPC Classification

Classification description:

Flue gas duct systems Chimney with internal flue pipe system

Recent Application in this class:

20190257530

ADVANCED WASTE HEAT RECOVERY IN INDUSTRIAL FIRED-HEATERS

20150056903

Exhaust adapter, exhaust structure for water heater, and method for installing exhaust adapter