Assignee
SPIREX CORP
US15 patents
Top patents by PatentIndex Score
US5188399AFeb 23, 1993
Pipe coupling device and method
SPIREX CORP59 citations94
US5071256ADec 10, 1991
Extruder injection apparatus and method
SPIREX CORP32 citations92
US5164207ANov 17, 1992
Plastic extruder with automatic shut-off valve
SPIREX CORP50 citations91
US5096302AMar 17, 1992
Plastic feeding device and method
SPIREX CORP37 citations91
US4944906AJul 31, 1990
Methods of injection molding and extruding wet hygroscopic ionomers
SPIREX CORP50 citations91
US4752136AJun 21, 1988
Extruder injection apparatus and method
SPIREX CORP46 citations91
US5439633AAug 8, 1995
Plastic extruder having a mixing valve with automatic shut-off
SPIREX CORP32 citations90
US5318357AJun 7, 1994
Extruder injection apparatus
SPIREX CORP28 citations90
US5816698AOct 6, 1998
Screw and plasticating apparatus and method
SPIREX CORP51 citations88
US5798077AAug 25, 1998
Screw for plasticating apparatus and method of use
SPIREX CORP30 citations88
US6585001B2Jul 1, 2003
Flow through ring valve for plastic extruding systems
SPIREX CORP15 citations79
US5931578AAug 3, 1999
Extruder and extrusion screw therefor
SPIREX CORP10 citations72
US5018917AMay 28, 1991
Apparatus for grooving the barrel of a plasticating machine
SPIREX CORP12 citations72
US4953279ASep 4, 1990
Method and apparatus for grooving the barrel of a plasticating machine
SPIREX CORP8 citations72
US5823668AOct 20, 1998
Extruder and extrusion screw therefor
SPIREX CORP3 citations61