Assignee
WELLMAN INC
US·72 granted patents·9 pending applications·1,964 citations·filing 1991–2009
Top patents by PatentIndex Score
81 records- 0198US5898058AMethod of post-polymerization stabilization of high activity catalysts in continuous polyethylene terephthalate productionWELLMAN INC·Filed 1996·Granted Apr 27, 1999·239 cites·13 claims
- 0297US6803082B2Methods for the late introduction of additives into polyethylene terephthalateWELLMAN INC·Filed 2003·Granted Oct 12, 2004·66 cites·38 claims
- 0397US6590069B2Methods of post-polymerization extruder injection in condensation polymer productionWELLMAN INC·Filed 2001·Granted Jul 8, 2003·86 cites·75 claims
- 0497US6569991B2Methods of post-polymerization extruder injection in polyethylene terephthalate productionWELLMAN INC·Filed 2001·Granted May 27, 2003·84 cites·58 claims
- 0597US6500890B2Polyester bottle resins having reduced frictional properties and methods for making the sameWELLMAN INC·Filed 2000·Granted Dec 31, 2002·75 cites·39 claims
- 0697US5876644AFood quality polyester recyclingWELLMAN INC·Filed 1996·Granted Mar 2, 1999·101 cites·26 claims
- 0796US6599596B2Methods of post-polymerization injection in continuous polyethylene terephthalate productionWELLMAN INC·Filed 2000·Granted Jul 29, 2003·66 cites·63 claims
- 0896US6573359B2Methods of post-polymerization injection in condensation polymer productionWELLMAN INC·Filed 2001·Granted Jun 3, 2003·65 cites·88 claims
- 0995US6727306B2Polymer resins having reduced frictional propertiesWELLMAN INC·Filed 2002·Granted Apr 27, 2004·81 cites·28 claims
- 1095US6710158B2Methods for making polyester bottle resins having reduced frictional propertiesWELLMAN INC·Filed 2002·Granted Mar 23, 2004·76 cites·52 claims
- 1195US6250060B1Method of producing improved knit fabrics from blended fibersWELLMAN INC·Filed 1998·Granted Jun 26, 2001·44 cites·32 claims
- 1293US7129317B2Slow-crystallizing polyester resinsWELLMAN INC·Filed 2004·Granted Oct 31, 2006·44 cites·104 claims
- 1392US6284866B1Method of preparing modified polyester bottle resinsWELLMAN INC·Filed 1999·Granted Sep 4, 2001·55 cites·23 claims
- 1491US6322886B2Polyethylene glycol modified polyester fibers, yarns, and fabrics and method for making the sameWELLMAN INC·Filed 2001·Granted Nov 27, 2001·23 cites·67 claims
- 1591US6291066B1Polyethylene glycol modified polyester fibers and method for making the sameWELLMAN INC·Filed 2000·Granted Sep 18, 2001·24 cites·102 claims
- 1690US7094863B2Polyester preforms useful for enhanced heat-set bottlesWELLMAN INC·Filed 2004·Granted Aug 22, 2006·37 cites·68 claims
- 1790US6335422B2Method of preparing modified polyester bottle resinsWELLMAN INC·Filed 2001·Granted Jan 1, 2002·38 cites·22 claims
- 1888US6752336B1Carpet recycling methodWELLMAN INC·Filed 2002·Granted Jun 22, 2004·54 cites·44 claims
- 1988US6399705B2Method of preparing polyethylene glycol modified polyester filamentsWELLMAN INC·Filed 2000·Granted Jun 4, 2002·16 cites·28 claims
- 2087US7238770B2Methods of making imide-modified polyester resinsWELLMAN INC·Filed 2005·Granted Jul 3, 2007·12 cites·75 claims
- 2187US6883667B1Automatic debris separation systemWELLMAN INC·Filed 2003·Granted Apr 26, 2005·44 cites·55 claims
- 2287US6035621ASpinning apparatus, method of producing yarns, and resulting yarnsWELLMAN INC·Filed 1999·Granted Mar 14, 2000·12 cites·5 claims
- 2386US6303739B2Method of preparing polyethylene glycol modified polyester filamentsWELLMAN INC·Filed 2000·Granted Oct 16, 2001·15 cites·20 claims
- 2485US7829656B2Solid phase polymerization catalyst systemWELLMAN INC·Filed 2009·Granted Nov 9, 2010·6 cites·29 claims
- 2584US5344026AMethod and apparatus for sorting plastic itemsWELLMAN INC·Filed 1992·Granted Sep 6, 1994·60 cites·35 claims
- 2683US6454982B1Method of preparing polyethylene glycol modified polyester filamentsWELLMAN INC·Filed 1999·Granted Sep 24, 2002·21 cites·51 claims
- 2781US7763701B2Composite solid phase polymerization catalystWELLMAN INC·Filed 2009·Granted Jul 27, 2010·4 cites·31 claims
- 2881US6623853B2Polyethylene glycol modified polyester fibers and method for making the sameWELLMAN INC·Filed 2001·Granted Sep 23, 2003·28 cites·133 claims
- 2981US5485964AMethod and apparatus for sorting plastic itemsWELLMAN INC·Filed 1994·Granted Jan 23, 1996·48 cites·17 claims
- 3076US6509091B2Polyethylene glycol modified polyester fibersWELLMAN INC·Filed 2001·Granted Jan 21, 2003·15 cites·38 claims
- 3175US6582817B2Nonwoven fabrics formed from polyethylene glycol modified polyester fibers and method for making the sameWELLMAN INC·Filed 2001·Granted Jun 24, 2003·15 cites·99 claims
- 3275US6485829B2Polyester modified with polyethylene glycol and pentaerythritolWELLMAN INC·Filed 2001·Granted Nov 26, 2002·9 cites·20 claims
- 3371US6110405AMelt spinning colored polycondensation polymersWELLMAN INC·Filed 1997·Granted Aug 29, 2000·24 cites·38 claims
- 3470US6883668B1Method of automatic debris separationWELLMAN INC·Filed 2003·Granted Apr 26, 2005·17 cites·38 claims
- 3570US5531951AMethod of forming staple fibers from self-texturing filamentsWELLMAN INC·Filed 1994·Granted Jul 2, 1996·24 cites·13 claims
- 3667US5227109AMethod for producing multicomponent polymer fibersWELLMAN INC·Filed 1992·Granted Jul 13, 1993·31 cites·17 claims
- 3766US5469973ASorting optically different solid massesWELLMAN INC·Filed 1994·Granted Nov 28, 1995·29 cites·32 claims
- 3865US7858731B2Polyester resins and polyester containers having reduced frictional propertiesWELLMAN INC·Filed 2008·Granted Dec 28, 2010·0 cites·37 claims
- 3965US6182685B1Injector structure for liquid additivesWELLMAN INC·Filed 1999·Granted Feb 6, 2001·29 cites·19 claims
- 4065US2009176046A1Polyester Resins for High-Strength ArticlesWELLMAN INC·Filed 2008·Application pending·0 cites
- 4164US5970700ADrafting apparatus and method for producing yarnsWELLMAN INC·Filed 1997·Granted Oct 26, 1999·17 cites·22 claims
- 4262US7229688B2Method and apparatus for high denier hollow spiral fiberWELLMAN INC·Filed 2005·Granted Jun 12, 2007·2 cites·2 claims
- 4362US7001664B2Method and apparatus for high denier hollow spiral fiberWELLMAN INC·Filed 2004·Granted Feb 21, 2006·6 cites·14 claims
- 4462US5407625AMethod of forming self-texturing filaments and resulting self-texturing filamentsWELLMAN INC·Filed 1993·Granted Apr 18, 1995·18 cites·25 claims
- 4561US6706393B2Polyester fiber tow having substantially uniform primary and secondary crimpsWELLMAN INC·Filed 2003·Granted Mar 16, 2004·3 cites·29 claims
- 4661US5614296AResilient molded preform made from staple fibers of self-texturing filamentsWELLMAN INC·Filed 1995·Granted Mar 25, 1997·18 cites·4 claims
- 4760US6797209B2Method and apparatus for high denier hollow spiral fiberWELLMAN INC·Filed 2003·Granted Sep 28, 2004·6 cites·54 claims
- 4860US6294254B1Polyester modified with polyethylene glycol and pentaerythritolWELLMAN INC·Filed 1998·Granted Sep 25, 2001·11 cites·16 claims
- 4956US6383635B1Melt spinning colored polycondensation polymersWELLMAN INC·Filed 1999·Granted May 7, 2002·16 cites·12 claims
- 5055US5510183AMethod of forming self-texturing filaments and resulting self-texturing filamentsWELLMAN INC·Filed 1994·Granted Apr 23, 1996·13 cites·3 claims
Showing the top 50 of 81 patent records by PatentIndex Score.
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