Patents by Inventor Arun P. Aneja

Arun P. Aneja has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyester filaments and tows
    Patent number: 5626961
    Abstract: A new polyester fiber is provided with an improved scalloped-oval cross-section, such as provides advantages in comfort in downstream products, such as fabrics and garments, and in mill-processing, especially in the form of tows that are suitable for processing on the worsted or woollen systems, and their corresponding slivers.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: May 6, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Arun P. Aneja
  • Polyester tow
    Patent number: 5591523
    Abstract: Tow that is suitable for processing on a worsted or woollen system consists essentially of continuous polyester filaments that are a mixture of filaments of higher denier and of lower denier and that have a scalloped-oval or other cross-section that is of generally oval shape, but with grooves or channels that run along the length of the filaments. Such polyester tows provide improved processing on the worsted system to provide spun yarns of polyester and blends with wool, and downstream articles, such as fabrics and garments.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: January 7, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Arun P. Aneja
  • Process for polyester fine hollow filaments
    Patent number: 5585182
    Abstract: A post-coalescence melt-spinning process for preparing fine undrawn hollow polyester filaments having excellent mechanical quality and uniformity at high speeds (2-5 km/min) involving selection of polymer viscosity and spinning conditions, whereby the void content of the resulting new undrawn filaments is essentially maintained or increased on cold-drawing or hot-drawing with or without post heat treatment, and the new fine hollow polyester filaments obtained thereby.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: December 17, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arun P. Aneja, David G. Bennie, Robert J. Collins, Hans Rudolf E. Frankfort, Stephen B. Johnson, Benjamin H. Knox, Elmer E. Most, Jr.
  • Continuous hollow filaments, yarns, and tows
    Patent number: 5532060
    Abstract: Hollow polyester undrawn filaments having excellent mechanical quality and uniformity are prepared by a simplified post-coalescence melt spinning process at speeds of e.g. 2-5 km/min by selection of polymer and spinning conditions whereby the void content of the undrawn filaments can be essentially maintained or even increased when drawn cold or hot, with or without post heat-treatment.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: July 2, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arun P. Aneja, James H. Drew, Benjamin H. Knox
  • Process of making fine polyester hollow filaments
    Patent number: 5487859
    Abstract: A post-coalescence melt-spinning process for preparing fine undrawn hollow polyester filaments having excellent mechanical quality and uniformity at high speeds (2-5 km/min) involving selection of polymer viscosity and spinning conditions, whereby the void content of the resulting new undrawn filaments is essentially maintained or increased on cold-drawing or hot-drawing with or without post heat treatment, and the new fine hollow polyester filaments obtained thereby.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: January 30, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arun P. Aneja, David G. Bennie, Robert J. Collins, Hans Rudolf E. Frankfort, Stephen B. Johnson, Benjamin H. Knox, Elmer E. Most, Jr.
  • Continuous hollow filament, yarns, and tows
    Patent number: 5356582
    Abstract: Hollow polyester undrawn filaments having excellent mechanical quality and uniformity are prepared by a simplified post-coalescence melt spinning process at speeds of e.g. 2-5 km/min by selection of polymer and spinning conditions whereby the void content of the undrawn filaments can be essentially maintained or even increased when drawn cold or hot, with or without post heat-treatment.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: October 18, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arun P. Aneja, James H. Drew, Benjamin H. Knox
  • Spinneret for the production of hollow filaments
    Patent number: 5330348
    Abstract: Segmented slotted spinning capillaries for producing hollow filaments afford enhanced fiber coalescence when the entrance angle to the capillary is unsymmetrical with respect to the center line of the slot.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: July 19, 1994
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Arun P. Aneja, James H. Drew, Curtis E. Moran, Jr.