Source: http://www.google.com/patents/US6752945?dq=5787449
Timestamp: 2014-07-25 17:27:37
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Matched Legal Cases: ['application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 60']

Patent US6752945 - Via lowering relaxation temperature to obtain maximum crimp take-up - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA process of making polytrimethylene terephthalate staple fibers, including (a) providing polytrimethylene terephthalate, (b) melt spinning the melted polytrimethylene terephthalate at a temperature of 245-285� C. into filaments, (c) quenching the filaments, (d) drawing the quenched filaments, (e) crimping...http://www.google.com/patents/US6752945?utm_source=gb-gplus-sharePatent US6752945 - Via lowering relaxation temperature to obtain maximum crimp take-upAdvanced Patent SearchPublication numberUS6752945 B2Publication typeGrantApplication numberUS 09/934,904Publication dateJun 22, 2004Filing dateAug 22, 2001Priority dateSep 12, 2000Fee statusPaidAlso published asCA2388852A1, CA2388873A1, CN1184365C, CN1232685C, CN1401019A, CN1411517A, DE60108603D1, DE60108603T2, DE60108603T3, DE60109729D1, DE60109729T2, EP1230450A1, EP1230450B1, EP1230450B2, EP1230451A1, EP1230451B1, US6872352, US20020071951, US20020153641, WO2002022925A1, WO2002022927A1Publication number09934904, 934904, US 6752945 B2, US 6752945B2, US-B2-6752945, US6752945 B2, US6752945B2InventorsIsmael A. Hernandez, Geoffrey David Hietpas, James M. Howell, Claudia SchultzeOriginal AssigneeE. I. Du Pont De Nemours And CompanyExport CitationBiBTeX, EndNote, RefManPatent Citations (85), Non-Patent Citations (30), Referenced by (3), Classifications (23), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetVia lowering relaxation temperature to obtain maximum crimp take-upUS 6752945 B2Abstract A process of making polytrimethylene terephthalate staple fibers, including (a) providing polytrimethylene terephthalate, (b) melt spinning the melted polytrimethylene terephthalate at a temperature of 245-285� C. into filaments, (c) quenching the filaments, (d) drawing the quenched filaments, (e) crimping the drawn filaments using a mechanical crimper at a crimp level of 8-30 crimps per inch (3-12 crimps/cm), (f) relaxing the crimped filaments at a temperature of 50-120� C., and (g) cutting the relaxed filaments into staple fibers having a length of about 0.2-6 inches (about 0.5-about 15 cm), and polytrimethylene terephthalate staple fibers, yarns and fabrics. Further, a process of optimizing the crimp take-up of a polytrimethylene terephthalate staple fiber including determining the relationship between denier and crimp take-up and manufacturing staple fibers having a denier selected based upon that determination.
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Du Pont De Nemours And CompanyBicomponent polyester fibersUS5736243Jun 12, 1996Apr 7, 1998E. I. Du Pont De Nemours And CompanyContinuous polyethyene terephthalate filaments have a cross-section that is of scalloped-oval shape with grooves; suitable for processing on a worsted or woolen systemUS5782935Feb 9, 1995Jul 21, 1998Degussa AktiengesellschaftDisperse dyesUS5851665Jun 6, 1997Dec 22, 1998E. I. Du Pont De Nemours And CompanyFiberfill structureUS5874372Oct 28, 1997Feb 23, 1999Toyo Boseki Kabushiki KaishaTwo-component composite fibers comprising a highly shrinkable polyester component a and a less shrinkable polyester component bUS5882794Nov 14, 1997Mar 16, 1999E. I. Du Pont De Nemours And CompanySynthetic fiber cross-sectionUS5891568Oct 1, 1997Apr 6, 1999E. I. Du Pont De Nemours And CompanyPolyester fiberUS5970700Dec 23, 1997Oct 26, 1999Wellman, Inc.Drafting apparatus and method for producing yarnsUS5994451Apr 24, 1998Nov 30, 1999Shell Oil CompanyContaining about 0.1 to about 5 wt % of a polyketone can be injection molded at a low temperature and rapid molding time.US6023926Aug 28, 1998Feb 15, 2000E. I. Du Pont De Nemours And CompanyCarpet styling yarn and process for makingUS6037057Feb 13, 1998Mar 14, 2000E. I. Du Pont De Nemours And CompanySheath-core polyester fiber including an antimicrobial agentUS6250060Jul 9, 1998Jun 26, 2001Wellman, Inc.Method of producing improved knit fabrics from blended fibersUS6287688Mar 3, 2000Sep 11, 2001E. I. 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Oppermann, et al., "Fibers Made of Poly(trimethylene terephthalate)", Dornbirn (1995).Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7578957Dec 10, 2003Aug 25, 2009E. I. Du Pont De Nemours And CompanyFrom polypropylene terephthalate; heat fixing; carpetsUS8021736Jul 6, 2007Sep 20, 2011E.I. Du Pont De Nemours And CompanySubstantially flame retardant-free 3GT carpetEP1927683A2Nov 28, 2007Jun 4, 2008Futura Polyesters LimitedPolyester staple fiber (PSF)/filament yarn (POY and PFY) for textile applicationsClassifications U.S. Classification264/143, 264/342.0RE, 264/235, 264/210.8, 264/210.7, 264/168, 264/211.14, 264/211.17, 264/235.6International ClassificationD02J1/22, D04H1/54, D04H1/42, D02G1/02, D01F6/62, D04H1/56Cooperative ClassificationD04H1/42, D04H1/54, D01F6/62, D04H1/565European ClassificationD04H1/56B, D01F6/62, D04H1/54, D04H1/42Legal EventsDateCodeEventDescriptionSep 21, 2011FPAYFee paymentYear of fee payment: 8Nov 23, 2007FPAYFee paymentYear of fee payment: 4Jan 8, 2002ASAssignmentOwner name: E.I. DU PONT DE NEMOURS AND COMPANY, DELAWAREFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HERNANDEZ, ISMAEL A.;HIETPAS, GEOFFREY DAVID;HOWELL, JAMES M.;AND OTHERS;REEL/FRAME:012430/0169;SIGNING DATES FROM 20010927 TO 20011007Owner name: E.I. DU PONT DE NEMOURS AND COMPANY LEGAL PATENTSFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HERNANDEZ, ISMAEL A. /AR;REEL/FRAME:012430/0169;SIGNING DATES FROM 20010927 TO 20011007RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google