George G Vassilatos

US Patent:

6432340, Aug 13, 2002

Filed:

Feb 23, 2000

Appl. No.:

09/511042

Inventors:

George Vassilatos - Wilmington DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D01F 660

US Classification:

2641761

Abstract:

Thermoplastics may be melt spun at high production rates, and without physical property degradation, by spinning a blend of the thermoplastic and a minor amount of a specified liquid crystalline polymer.

US Patent:

6444151, Sep 3, 2002

Filed:

Apr 12, 2000

Appl. No.:

09/547854

Inventors:

Young D. T. Nguyen - Charlottesville VA
Hans R. Frankfort - Kinston NC
Gregory Eugene Sweet - Greenville NC
George Vassilatos - Wilmington DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D01D 5092

US Classification:

264101, 26421114, 26421115, 264237, 425 722, 4253782, 4253791, 4253822, 425464

Abstract:

A melt spinning apparatus for spinning continuous polymeric filaments including a first stage gas inlet chamber adapted to be located below a spinneret and optionally a second stage gas inlet chamber located below the first stage gas inlet chamber. The gas inlet chambers supply gas to the filaments to control the temperature of the filaments. The melt spinning apparatus also includes a tube located below the second stage gas inlet chamber for surrounding the filaments as they cool. The tube may include an interior wall having a converging section, optionally followed by a diverging section.

US Patent:

6692687, Feb 17, 2004

Filed:

Jan 11, 2001

Appl. No.:

09/758309

Inventors:

Jing Chung Chang - Columbia SC
Joseph V. Kurian - Newark DE
Young D. Nguyen - Singapore SGX, SG
James E. Van Trump - Wilmington DE
George Vassilatos - Wilmington DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D01D 5098

US Classification:

264555, 264168, 26417214, 26417215, 26417217, 2642105, 2642108, 26421112, 26421114, 26421117, 2642356

Abstract:

Highly crimped, fully drawn bicomponent fibers, prepared by melt-spinning, followed by gas-flow quenching, heat treatment and high speed windup, are provided, as are fine-decitex and highly uniform polyester bicomponent fibers.

US Patent:

6841245, Jan 11, 2005

Filed:

Dec 22, 2003

Appl. No.:

10/743976

Inventors:

Jing Chung Chang - Columbia SC, US
Joseph V. Kurian - Newark DE, US
Young D. Nguyen - Charlottesville VA, US
James E. Van Trump - Wilmington DE, US
George Vassilatos - Wilmington DE, US

Assignee:

Invista North America S.A.R.L. - Wilmington DE

International Classification:

D01F 800

US Classification:

428373, 428370, 428374

Abstract:

Highly crimped, fully drawn bicomponent fibers, prepared by melt-spinning, followed by gas-flow quenching, heat treatment and high speed windup, are provided, as are fine-decitex and highly uniform polyester bicomponent fibers.

US Patent:

6899836, May 31, 2005

Filed:

May 24, 2002

Appl. No.:

10/155159

Inventors:

K Ranjan Samant - Hockessin DE, US
George Vassilatos - Wilmington DE, US

Assignee:

Invista North America S.a r.l. - Wilmington DE

International Classification:

D01D005/16
D01F001/04
D01F001/10
D01F006/60
D02G003/02

US Classification:

264 78, 264103, 2642106, 2642108, 26421112, 26421114

Abstract:

The present invention relates to methods for making polyamide filaments, such as nylon 6,6, having high tensile strength. The invention also relates to yarns and other articles formed from such filaments. The invention is particularly useful for providing a filament yarn with tenacity equal or superior to the prior art at high spinning process speeds while retaining the ability to draw the yarn. The invention further relates to providing a filament yarn extruded from a delustered or pigmented polyamide polymer.

US Patent:

7011885, Mar 14, 2006

Filed:

Dec 2, 2004

Appl. No.:

11/001135

Inventors:

Jing Chung Chang - Columbia SC, US
Joseph V. Kurian - Newark DE, US
Young D. Nguyen - Charlottesville VA, US
James E. Van Trump - Wilmington DE, US
George Vassilatos - Wilmington DE, US

Assignee:

INVISTA North America S.à.r.l. - Wilmington DE

International Classification:

D01F 8/00
D01D 5/32
D01D 5/34

US Classification:

428370, 428373, 428374, 26417214, 26417215

Abstract:

Highly crimped, fully drawn bicomponent fibers, prepared by melt-spinning, followed by gas-flow quenching, heat treatment and high speed windup, are provided, as are fine-decitex and highly uniform polyester bicomponent fibers.

US Patent:

20020037411, Mar 28, 2002

Filed:

Jul 9, 2001

Appl. No.:

09/901231

Inventors:

Hans Frankfort - Kinston NC, US
Leonard Herbig - Greenville NC, US
Gregory Sweet - Greenville NC, US
George Vassilatos - Wilmington DE, US

International Classification:

D01F001/10
D01D005/12

US Classification:

428/395000, 264/210600, 264/210800, 264/211000, 264/211150

Abstract:

A method of making polymeric, e.g., polyester, filaments having low denier spread by use of a polymer of high viscosity is described. The filaments are useful to make yarns and other articles.

US Patent:

20030042650, Mar 6, 2003

Filed:

May 31, 2002

Appl. No.:

10/161391

Inventors:

George Vassilatos - Wilmington DE, US

International Classification:

D01D005/08
D01F006/60
D01F006/62
C08G063/00

US Classification:

264/176100, 264/211120, 524/425000, 524/444000, 524/451000, 524/601000, 524/604000, 524/605000, 528/190000, 528/193000, 528/194000

Abstract:

Thermoplastics may be melt spun at high production rates, and without physical property degradation, by spinning a blend of the thermoplastic and a minor amount of a specified liquid crystalline polymer.