B21C37/156 - CPC Classification Index

ClassID:

38336 ⎘

B21C37/156 - CPC Classification

Classification description:

Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes; Making tubes of special shape; Making tube fittings Making tubes with wall irregularities

Sub-classes:

B21C37/157 » {Perforations} 38
B21C37/158 » {Protrusions, e.g. dimples} 36

Recent Application in this class:

20210352959

2021-11-18

Method for manufacturing a glass filter

20210245221

2021-08-12

Method for manufacturing pipe

20200324329

2020-10-15

Cylindrical tube formation

20190076901

2019-03-14

Cylindrical tube formation

20180193893

2018-07-12

Cylindrical tube formation

20140190586

2014-07-10

Tubular support structure with variable wall thickness

20130340880

2013-12-26

Method and apparatus for fabricating a metal pipe having at least one smooth portion and at least one grooved portion

20130248158

2013-09-26

Method for manufacturing refrigerant guide tube of heat exchanger, refrigerant guide tube manufactured using the method and heat exchanger with the refrigerant guide tube

20130020835

2013-01-24

STRUCTURAL TUBE AND METHOD

#10

20130008083

2013-01-10

TOMATO CAGE FORMED OF HOLLOW WIRE

#11

20060073353

2006-04-06

Profiles or tubes consisting of flexibly rolled strip material

#12

19267452

2025-10-07

Hydraulic actuator shell and preparation method