B21K21/00 - CPC Classification Index

ClassID:

39326 ⎘

B21K21/00 - CPC Classification

Classification description:

Making hollow articles not covered by a single preceding sub-group

Sub-classes:

B21K21/02 » Producing blanks in the shape of discs or cups as semifinished articles for making hollow articles, e.g. to be deep-drawn or extruded 16
B21K21/04 » Shaping thin-walled hollow articles, e.g. cartridges 23
B21K21/06 » Shaping thick-walled hollow articles, e.g. projectiles 12
B21K21/08 » Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs 47
B21K21/12 » Shaping end portions of hollow articles 76
B21K21/16 » Remodelling hollow bodies with respect to the shape of the cross-section 22

Recent Application in this class:

20250074514

2025-03-06

STRUCTURAL COMPONENT AND METHOD FOR PRODUCING A STRUCTURAL COMPONENT

20130125605

2013-05-23

METHOD OF MANUFACTURING DOOR FRAME FOR WIND TOWER

20120279607

2012-11-08

Austenitic stainless steel pipe excellent in steam oxidation resistance and manufacturing method therefor

20120273097

2012-11-01

SPUTTERING TARGETS, SPUTTER REACTORS, METHODS OF FORMING CAST INGOTS, AND METHODS OF FORMING METALLIC ARTICLES

20120216589

2012-08-30

PRETENSIONER AND PRETENSIONER MANUFACTURING METHOD

20110146471

2011-06-23

Forming method for applying a continuous punching to a chain roller

20100230926

2010-09-16

Unitary crown fork assembly and method of fabrication

20100229675

2010-09-16

Unitary crank spindle assembly and method of fabrication

20100051734

2010-03-04

Pretensioner

#10

20100051733

2010-03-04

Pretensioner and pretensioner manufacturing method

#11

20090117402

2009-05-07

Thermal module

#12

20070119054

2007-05-31

Race member in hub unit and method of producing the same

#13

20070006628

2007-01-11

Molding method by forging and molding method for case

#14

20050238509

2005-10-27

Clutch suction disk for air compressor of vehicle air conditioner

#15

20050185870

2005-08-25

Race member in hub unit and method of producing the same

#16

20050145004

2005-07-07

Methods for the cold extrusion of metallic elements with dead or through holes and plant for carrying out said methods

#17

20050091825

2005-05-05

Method of manufacturing hollow structural elements