F22B21/22 - CPC Classification Index

ClassID:

155527 ⎘

F22B21/22 - CPC Classification

Classification description:

Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight

Sub-classes:

F22B21/24 » bent in serpentine or sinuous form 6
F22B21/26 » bent helically, i.e. coiled 20
F22B21/28 » bent spirally 4
F22B21/30 » bent in U-loop form 8

Recent Application in this class:

20190257514

2019-08-22

Package boiler with tandem furnace tubes

20190017697

2019-01-17

Multiple pass flexible water tube boiler and method of using same

20130306003

2013-11-21

BENT-OUT WALL IN THE REGION OF A SUBSTANTIALLY RECTANGULAR BURNER OPENING

20070163521

2007-07-19

Once-through boiler