F22B29/061 - CPC Classification Index

ClassID:

155565 ⎘

F22B29/061 - CPC Classification

Classification description:

Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes Construction of tube walls

Sub-classes:

F22B29/062 » {involving vertically-disposed water tubes} 18
F22B29/064 » {involving horizontally- or helically-disposed water tubes} 13
F22B29/065 » {involving upper vertically disposed water tubes and lower horizontally- or helically disposed water tubes} 4

Recent Application in this class:

20160320052

2016-11-03

Heat transfer tube including a groove portion having a spiral shape extending continuously and a rib portion extending continuously and protruding inward by the groove portion