F23J2211/101 - CPC Classification Index

ClassID:

156812 ⎘

F23J2211/101 - CPC Classification

Classification description:

Flue gas duct systems; Balanced flues (combining air supply and flue gas exhaust) with coaxial duct arrangement

Recent Application in this class:

20250314380

2025-10-09

CHIMNEY SYSTEMS WITH INTEGRATED WASTE HEAT RECOVERY AND RELATED METHODS

20240360997

2024-10-31

ROOF PLUMBING VENTS AND METHODS INCLUDING FOR TANKLESS WATER HEATERS WITH CONCENTRIC VENTING

20230027028

2023-01-26

Roof plumbing vents and methods including for tankless water heaters with concentric venting

20180274782

2018-09-27

Detecting blockage of a duct of a burner assembly

20170350594

2017-12-07

Gas exchange termination system

20170130960

2017-05-11

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

20150056903

2015-02-26

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

20120193911

2012-08-02

Cogeneration apparatus

20120031392

2012-02-09

Heating apparatus with fan

#10

20100101505

2010-04-29

Transition element for a passage in a water heater

#11

20090272340

2009-11-05

Flue, and a boiler including such a flue

#12

20060183066

2006-08-17

Sealed combustion gas-fired infrared heater

#13

20060105280

2006-05-18

Through a wall combustion detector

#14

20050155209

2005-07-21

Positive pipe interlock