ClassID:

152982

F16L21/002 - CPC Classification

Classification description:

Joints with sleeve or socket Sleeves or nipples for pipes of the same diameter; Reduction pieces

Sub-classes:
Recent Application in this class:
#1
20260125890
2026-05-07

MULTI-FIT INLINE SURFACE DRAIN

#2
20260117902
2026-04-30

ROUND PIPE TO FLAT VENT ADAPTER FOR VAPOR MITIGATION IMPLEMENTATIONS

#3
20260055833
2026-02-26

ADAPTER SYSTEMS

#4
20250352934
2025-11-20

Air Intake Assembly and Methods Thereof

#5
20250314336
2025-10-09

CONNECTION ARRANGEMENT DEVICE AND METHOD FOR FLUID LINE

#6
20250283570
2025-09-11

INSULATED SLEEVE CONNECTORS AND METHODS FOR CONNECTING DUCTS

#7
20250237332
2025-07-24

AIR CONDITIONING SERVICE ADAPTER

#8
20250227834
2025-07-10

HIGH PRESSURE COUPLING ASSEMBLY

#9
20250146603
2025-05-08

PORT CONNECTORS

#10
20250146602
2025-05-08

PIPE CONNECTION DEVICE FOR REPAIRS

#11
20240318750
2024-09-26

TUBING COUPLER

#12
20240247476
2024-07-25

MULTI-FIT INLINE SURFACE DRAIN

#13
20240167593
2024-05-23

Quick Connect Sleeve

#14
20240159334
2024-05-16

Pipe connection clamp

#15
20230356127
2023-11-09

Air Intake Assembly and Methods Thereof

#16
20230313921
2023-10-05

Additive manufactured assembly-free tool for vehicle gearbox maintenance

#17
20230160502
2023-05-25

HOSE, HOSE ARRANGEMENT AND CORRESPONDING PROCESS FOR MANUFACTURING A HOSE ARRANGEMENT

#18
20230124952
2023-04-20

Universal pipe sleeve junction for an aspirated smoke detection system

#19
20230003321
2023-01-05

Double band clamp assembly for no hub coupling

#20
20220412487
2022-12-29

Pipe Coupling

#21
20220397217
2022-12-15

Connector assembly

#22
20220390047
2022-12-08

Tubing coupler

#23
20220266183
2022-08-25

Air intake assembly and methods thereof

#24
20220228681
2022-07-21

Finger-Tight Gas Chromatograph (GC) Column Connections

#25
20220154857
2022-05-19

Pipe connector

#26
20220034442
2022-02-03

COUPLER HAVING PROTECTIVE BUMPERS AND BANDS

#27
20210404184
2021-12-30

Fitting for a rain gutter downpipe

#28
20210372113
2021-12-02

Multi-fit inline surface drain

#29
20210278049
2021-09-09

Pre-assembled gas plumbing system and methods

#30
20210270399
2021-09-02

Seal assembly

#31
20210246001
2021-08-12

Loading crane

#32
20210239243
2021-08-05

PIPE COUPLING

#33
20210156883
2021-05-27

Fluid Hose Splice Assembly

#34
20210123548
2021-04-29

Apparatus for connection and sealing of utility connections

#35
20210108744
2021-04-15

Pipe coupling apparatus

#36
20210025526
2021-01-28

Hybrid metallic/composite tube design to transfer bending, axial, and flexural shear

#37
20210010623
2021-01-14

Snap together pipe coupling assembly

#38
20210010622
2021-01-14

Universal pipe sleeve junction for an aspirated smoke detection system

#39
20200292110
2020-09-17

Snap together pipe coupling assembly

#40
20200284381
2020-09-10

Seal element for a pipe joint

#41
20200271253
2020-08-27

Pipe coupling

#42
20200254551
2020-08-13

METHOD FOR PRODUCING A PIPE FITTING, IN PARTICULAR BY WELD OVERLAY

#43
20200224692
2020-07-16

RODENT BARRIER COMPONENTS

#44
20200123961
2020-04-23

CLAMP

#45
20200001219
2020-01-02

Air intake assembly and methods thereof

#46
20200001218
2020-01-02

Air intake assembly and methods thereof

#47
20190388820
2019-12-26

Air intake assembly and methods thereof

#48
20190388819
2019-12-26

Air intake assembly and methods thereof

#49
20190360626
2019-11-28

Pipe section joining member, pipe joint and elongated pipe

#50
20190257451
2019-08-22

Coupling apparatus for joining poly-pipe

#51
20190234543
2019-08-01

Seal assembly

#52
20190219201
2019-07-18

Pipe connector

#53
20190209956
2019-07-11

Interface air filter and assembly

#54
20190162340
2019-05-30

Waste-gas line for a battery in an aircraft

#55
20190118313
2019-04-25

System and Method for Producing Chemicals at High Temperature

#56
20190093801
2019-03-28

Visual and tactile latch indicator for a fuel system coupling

#57
20190085642
2019-03-21

Line element with hooped tube and high-strength steel end fittings, and method for upgrading a riser pipe with same

#58
20190017637
2019-01-17

Top bar coupling

#59
20180368372
2018-12-27

Method for separable connection and fixation of two circular cylindrical pipe ends, system for connection of two pipe ends with the same external diameters and the same material thickness and use of such a system

#60
20180340636
2018-11-29

Tubular connecting arrangement and method of sealingly connecting tubulars

#61
20180335164
2018-11-22

Multi-stiffener for civil engineering and construction

#62
20180313478
2018-11-01

Piping connections and connection sockets

#63
20180313475
2018-11-01

High temperature leak prevention for piping components and connections

#64
20180274704
2018-09-27

Apparatus for connection and sealing of utility connections

#65
20180274698
2018-09-27

Pipe connector systems, devices and methods

#66
20180245721
2018-08-30

Fitting to connect water pipes

#67
20180224221
2018-08-09

Tube-to-header slip joint for air-to-air aftercooler

#68
20180195650
2018-07-12

METHOD OF PRODUCING A TUBE ARRANGEMENT, A TUBE ARRANGMENT AND A FURNACE PROVIDED WITH SUCH A TUBE ARRANGEMENT

#69
20180128403
2018-05-10

Method for Joining Ceramics to Ceramics or Ceramics to Metals, and Apparatus

#70
20180106403
2018-04-19

Subsea hydraulic coupling with metal bore liner

#71
20180087697
2018-03-29

Compression couplings

#72
20180080587
2018-03-22

Fluid couplings, systems, and methods

#73
20180010722
2018-01-11

Coupling assembly for connecting a drain to a drain pipe

#74
20180010719
2018-01-11

Plastic seal fitting

#75
20170307114
2017-10-26

Joint structure for steel pipes and method of manufacturing the same

#76
20170292335
2017-10-12

Device for clamping an element, carriage for a ground drilling device, ground drilling device, method for clamping an element and method for the manufacture of a device for clamping an element

#77
20170276265
2017-09-28

OCTG pipe system and method of manufacturing thereof

#78
20170254463
2017-09-07

Pipe section joining member, pipe joint and elongated pipe

#79
20170211737
2017-07-27

Clamp

#80
20170191587
2017-07-06

SPIRAL PIPE GAP JOINT

#81
20170152972
2017-06-01

Coupling assembly

#82
20170106320
2017-04-20

Interface air filter and assembly

#83
20170082233
2017-03-23

Duct with shape memory material, and installation method

#84
20170009923
2017-01-12

Pipe Coupling

#85
20170009916
2017-01-12

Duct coupler for post-tensioned concrete member

#86
20160363243
2016-12-15

Tapering couplers for connecting fluid flow components

#87
20160319969
2016-11-03

Seal holding device for pipe clamp

#88
20160215786
2016-07-28

Reservoir egress fluid coupler

#89
20160208964
2016-07-21

Pipe coupling capsulation assembly

#90
20160201831
2016-07-14

PIPE REPAIR SYSTEM

#91
20160153595
2016-06-02

Tapering couplers for connecting fluid flow components

#92
20160136795
2016-05-19

Pressing tool with axial stroke working in opposite directions

#93
20160084412
2016-03-24

COUPLING BARREL AND METHODS OF PRODUCING THEREOF

#94
20160047500
2016-02-18

COUPLING AND USE

#95
20160040809
2016-02-11

EXHAUST SYSTEM CONNECTION ASSEMBLY

#96
20160010775
2016-01-14

Configurable coupling apparatus for tubular elements

#97
20150377393
2015-12-31

Hydraulic connecting bush, hydraulic connection, and hydraulic plug

#98
20150369417
2015-12-24

Covering spacer for protecting the internal surface of a pipe joining element

#99
20150362104
2015-12-17

PIPING COMPONENT AND PIPE

#100
20150345679
2015-12-03

Grooved-ended resilient expansion joint for joining a pair of groove-ended pipes

#101
20150345676
2015-12-03

Pipe Fitting

#102
20150345674
2015-12-03

Connector Having A Tubular Inner Surface Barb

#103
20150330544
2015-11-19

Duct coupler for post-tensioned concrete member

#104
20150323108
2015-11-12

Tubular connecting arrangement and method of sealingly connecting tubulars

#105
20150321238
2015-11-12

Pressing jaw, method for producing a non-detachable pipe joint, fitting and system consisting of a pressing jaw and a fitting

#106
20150308595
2015-10-29

Connector assembly for connecting pipes

#107
20150300540
2015-10-22

Pressing jaw, method for producing a non-detachable pipe joint, fitting and system consisting of a pressing jaw and a fitting

#108
20150300391
2015-10-22

System for locking a coupling of elements, having male and female ends

#109
20150276103
2015-10-01

Pipe joint

#110
20150276099
2015-10-01

PIPE CONNECTOR APPARATUS

#111
20150260322
2015-09-17

Method for joining ceramics to ceramics or ceramics to metals, and apparatus

#112
20150260318
2015-09-17

Pipe connector

#113
20150260316
2015-09-17

System and method for producing chemicals at high temperature

#114
20150233504
2015-08-20

TUBULAR STAND RACKING SYSTEM

#115
20150226357
2015-08-13

Device for connecting two fluid-conducting lines

#116
20150211662
2015-07-30

ADJUSTABLE FITTINGS FOR SMOOTH PIPE

#117
20150198275
2015-07-16

Spherical exhaust pipe joint

#118
20150198274
2015-07-16

Conduit-coupling adaptor for coupling fluid conduits of disparate diameters

#119
20150121673
2015-05-07

Device and method for effecting and verifying full mating engagement between a coupler and a complementary corresponding socket

#120
20150097369
2015-04-09

DUCT CONNECTION SYSTEM

#121
20150035275
2015-02-05

Clamping belt and pipe coupling for the force-closed connection of pipes, in particular of smooth-end pipes

#122
20140300061
2014-10-09

Bullet Nose Grommet for Radiator Assembly

#123
20140217727
2014-08-07

CONNECTOR MEMBER

#124
20140158217
2014-06-12

BACKWASH FITTING

#125
20140116015
2014-05-01

Interface air filter and assembly

#126
20130331022
2013-12-12

Fluid conditioning devices and assemblies

#127
20130328305
2013-12-12

SEAL HOLDING DEVICE FOR PIPE CLAMP

#128
20130324028
2013-12-05

Damper access assembly

#129
20130056980
2013-03-07

Mechanical joint restraint with pipe grip ring assembly

#130
20110146903
2011-06-23

Laser head and method of connecting tubular parts by the laser transmission method

#131
20110146049
2011-06-23

Grooved-ended resilient expansion joint and method of resiliently joining together a pair of grooved-ended pipes

#132
20110095520
2011-04-28

PIPE COUPLING WITH SEAL PRESSING DEVICE

#133
20110031738
2011-02-10

Pipe Coupling Spacer Insert

#134
20100219630
2010-09-02

COUPLING ASSEMBLY FOR FLUID LINES

#135
20100207332
2010-08-19

Tube seal components

#136
20100133804
2010-06-03

Method of replacing pipe couplings

#137
20100117356
2010-05-13

Adapter

#138
20100066080
2010-03-18

Device for the sealed coupling of two cylindrical pipes having different diameters

#139
20100007139
2010-01-14

COUPLER FOR CONNECTING METAL AND PLASTIC PIPES

#140
20090314376
2009-12-24

MODULAR CONDUIT STRUCTURE AND METHOD OF MAKING SAME

#141
20090072494
2009-03-19

Tube seal components

#142
20090008929
2009-01-08

Pipe coupling spacer insert

#143
20080296891
2008-12-04

Hose connector with adjustable ambient air inlets

#144
20080284165
2008-11-20

Universal coupler device

#145
20080267709
2008-10-30

Method and apparatus for coupling drainage units

#146
20080252074
2008-10-16

Method of Joining Components, Fitting and Tube Joint Where at Least One of the Components Comprises or is Made of Material Difficult to Weld

#147
20080143104
2008-06-19

Subsea Piping System

#148
20080079258
2008-04-03

Irrigation sprinkler adapter

#149
20080061552
2008-03-13

Vari-stage coupling device

#150
20080048439
2008-02-28

METHOD FOR JOINING MULTI-LAYERED PIPE

#151
20080048435
2008-02-28

Pipe coupling and clamp and method of application

#152
20080036198
2008-02-14

METHOD FOR JOINING MULTI-LAYERED PIPE

#153
20070296208
2007-12-27

Hollow pipe connector

#154
20060284423
2006-12-21

Extracorporeal circulation tube connector

#155
20060284413
2006-12-21

Pipe repair coupling

#156
20060249214
2006-11-09

Conduit, preferably a flexible hose

#157
20060157980
2006-07-20

Dual material threading for pipe adapter

#158
20060151995
2006-07-13

Transparent coupling

#159
20060103136
2006-05-18

Pipe coupling and method

#160
20050184524
2005-08-25

Quick-connect/quick-disconnect conduit connectors

#161
20050151369
2005-07-14

Device and method for coupling pipes

#162
20050134045
2005-06-23

Internally collared pipe joining system

#163
20050127667
2005-06-16

Flexible pipr joint

#164
18583964
2025-06-24

Floating joint and retainer connection structure

#165
18050695
2025-03-18

Drain adapter

#166
16553619
2023-05-09

Pump adapter

#167
16414437
2022-07-12

Pipe sleeve system and method of use

#168
15442010
2019-10-15

Interior texturing and self-aligning connector system for a spray chamber

#169
14723741
2018-06-12

Coupling assembly with watertight feature for securing conduits together

#170
14269216
2015-10-06

Pipe coupling with seal pressing device