Assignee
WELLMAN INC
US72 patents
Top patents by PatentIndex Score
US5898058AApr 27, 1999
Method of post-polymerization stabilization of high activity catalysts in continuous polyethylene terephthalate production
WELLMAN INC239 citations98
US6710158B2Mar 23, 2004
Methods for making polyester bottle resins having reduced frictional properties
WELLMAN INC76 citations97
US6590069B2Jul 8, 2003
Methods of post-polymerization extruder injection in condensation polymer production
WELLMAN INC86 citations97
US6569991B2May 27, 2003
Methods of post-polymerization extruder injection in polyethylene terephthalate production
WELLMAN INC84 citations97
US5876644AMar 2, 1999
Food quality polyester recycling
WELLMAN INC101 citations97
US6727306B2Apr 27, 2004
Polymer resins having reduced frictional properties
WELLMAN INC81 citations96
US6284866B1Sep 4, 2001
Method of preparing modified polyester bottle resins
WELLMAN INC55 citations96
US6803082B2Oct 12, 2004
Methods for the late introduction of additives into polyethylene terephthalate
WELLMAN INC66 citations95
US6599596B2Jul 29, 2003
Methods of post-polymerization injection in continuous polyethylene terephthalate production
WELLMAN INC66 citations95
US6573359B2Jun 3, 2003
Methods of post-polymerization injection in condensation polymer production
WELLMAN INC65 citations95
US6500890B2Dec 31, 2002
Polyester bottle resins having reduced frictional properties and methods for making the same
WELLMAN INC75 citations95
US5344026ASep 6, 1994
Method and apparatus for sorting plastic items
WELLMAN INC60 citations94
US6335422B2Jan 1, 2002
Method of preparing modified polyester bottle resins
WELLMAN INC38 citations92
US7129317B2Oct 31, 2006
Slow-crystallizing polyester resins
WELLMAN INC44 citations91
US7094863B2Aug 22, 2006
Polyester preforms useful for enhanced heat-set bottles
WELLMAN INC37 citations91
US6454982B1Sep 24, 2002
Method of preparing polyethylene glycol modified polyester filaments
WELLMAN INC21 citations91
US6399705B2Jun 4, 2002
Method of preparing polyethylene glycol modified polyester filaments
WELLMAN INC16 citations91
US6322886B2Nov 27, 2001
Polyethylene glycol modified polyester fibers, yarns, and fabrics and method for making the same
WELLMAN INC23 citations91
US6303739B2Oct 16, 2001
Method of preparing polyethylene glycol modified polyester filaments
WELLMAN INC15 citations91
US6291066B1Sep 18, 2001
Polyethylene glycol modified polyester fibers and method for making the same
WELLMAN INC24 citations91
US5614296AMar 25, 1997
Resilient molded preform made from staple fibers of self-texturing filaments
WELLMAN INC18 citations91
US5531951AJul 2, 1996
Method of forming staple fibers from self-texturing filaments
WELLMAN INC24 citations91
US6623853B2Sep 23, 2003
Polyethylene glycol modified polyester fibers and method for making the same
WELLMAN INC28 citations90
US6250060B1Jun 26, 2001
Method of producing improved knit fabrics from blended fibers
WELLMAN INC44 citations90
US5485964AJan 23, 1996
Method and apparatus for sorting plastic items
WELLMAN INC48 citations90
US5469973ANov 28, 1995
Sorting optically different solid masses
WELLMAN INC29 citations90
US6182685B1Feb 6, 2001
Injector structure for liquid additives
WELLMAN INC29 citations88
US6883667B1Apr 26, 2005
Automatic debris separation system
WELLMAN INC44 citations87
US6383635B1May 7, 2002
Melt spinning colored polycondensation polymers
WELLMAN INC16 citations87
US6110405AAug 29, 2000
Melt spinning colored polycondensation polymers
WELLMAN INC24 citations87
US6752336B1Jun 22, 2004
Carpet recycling method
WELLMAN INC54 citations85
US5227109AJul 13, 1993
Method for producing multicomponent polymer fibers
WELLMAN INC31 citations84
US6509091B2Jan 21, 2003
Polyethylene glycol modified polyester fibers
WELLMAN INC15 citations82
US6582817B2Jun 24, 2003
Nonwoven fabrics formed from polyethylene glycol modified polyester fibers and method for making the same
WELLMAN INC15 citations81
US5970700AOct 26, 1999
Drafting apparatus and method for producing yarns
WELLMAN INC17 citations81
US5603413AFeb 18, 1997
Sortation method for transparent optically active articles
WELLMAN INC26 citations80
US5407625AApr 18, 1995
Method of forming self-texturing filaments and resulting self-texturing filaments
WELLMAN INC18 citations80
US6883668B1Apr 26, 2005
Method of automatic debris separation
WELLMAN INC17 citations78
US7238770B2Jul 3, 2007
Methods of making imide-modified polyester resins
WELLMAN INC12 citations74
US5246589ASep 21, 1993
Repaired filtration elements for polymer manufacture
WELLMAN INC10 citations73
US6485829B2Nov 26, 2002
Polyester modified with polyethylene glycol and pentaerythritol
WELLMAN INC9 citations72
US6294254B1Sep 25, 2001
Polyester modified with polyethylene glycol and pentaerythritol
WELLMAN INC11 citations72
US5510183AApr 23, 1996
Method of forming self-texturing filaments and resulting self-texturing filaments
WELLMAN INC13 citations72
US6218007B1Apr 17, 2001
Method of producing high quality dark dyeing polyester and resulting yarns and fabrics
WELLMAN INC10 citations71
US6067785AMay 30, 2000
Method of producing high quality dark dyeing polyester and resulting yarns and fabrics
WELLMAN INC9 citations71
US7829656B2Nov 9, 2010
Solid phase polymerization catalyst system
WELLMAN INC6 citations70
US7001664B2Feb 21, 2006
Method and apparatus for high denier hollow spiral fiber
WELLMAN INC6 citations70
US6797209B2Sep 28, 2004
Method and apparatus for high denier hollow spiral fiber
WELLMAN INC6 citations70
US6746230B2Jun 8, 2004
Apparatus for high denier hollow spiral fiber
WELLMAN INC4 citations70
US6035621AMar 14, 2000
Spinning apparatus, method of producing yarns, and resulting yarns
WELLMAN INC12 citations70
Showing the top 50 of 72 patents by PatentIndex Score.