Patents by Inventor Ramunas L. Valteris

Ramunas L. Valteris 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).

  • Process of making staple fibers
    Patent number: 7578957
    Abstract: Improved staple fibers and processes for producing them are provided. The processes are particularly useful for forming staple fibers from poly(trimethylene terephthalate), especially carpet staple fibers. The processes include prewetting undrawn yarns and drawing the fibers under wet and warm conditions, thermo-fixing the texture, and drying at relatively low temperatures. Fibers produced according to the processes disclosed herein have improved properties and reduced brittleness as compared to fibers prepared using conventional processes.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: August 25, 2009
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jing Chung Chang, Richard Lee Dommel, Ramunas L. Valteris, Robert Mamoru Linek, Alfred Harold Thompson, Nirmal Kumas Agarwal
  • STAPLE FIBERS AND PROCESSES FOR MAKING SAME
    Publication number: 20090047857
    Abstract: Improved staple fibers and processes for producing them are provided. The processes are particularly useful for forming staple fibers from poly(trimethylene terephthalate), especially carpet staple fibers. The processes include prewetting undrawn yarns and drawing the fibers under wet and warm conditions, thermo-fixing the texture, and drying at relatively low temperatures. Fibers produced according to the processes disclosed herein have improved properties and reduced brittleness as compared to fibers prepared using conventional processes.
    Type: Application
    Filed: October 27, 2008
    Publication date: February 19, 2009
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Jing C. Chang, Richard Lee Dommel, Ramunas L. Valteris, Robert Mamoru Linek, Alfred H. Thompson, Nirmal K. Agarwal
  • Staple fibers and processes for making same
    Publication number: 20040146711
    Abstract: Improved staple fibers and processes for producing them are provided. The processes are particularly useful for forming staple fibers from poly(trimethylene terephthalate), especially carpet staple fibers. The processes include prewetting undrawn yarns and drawing the fibers under wet and warm conditions, thermo-fixing the texture, and drying at relatively low temperatures. Fibers produced according to the processes disclosed herein have improved properties and reduced brittleness as compared to fibers prepared using conventional processes.
    Type: Application
    Filed: December 10, 2003
    Publication date: July 29, 2004
    Inventors: Jing C. Chang, Richard Lee Dommel, Ramunas L. Valteris, Robert Mamoru Linek, Alfred H. Thompson, Nirmal K. Agarwal
  • Plate, foam and screen filament quenching apparatus
    Patent number: 4631018
    Abstract: An apparatus for quenching synthetic filaments which comprises an elongated chimney, a porous open-celled foam sheet, dividing said chimney longitudinally into a plenum chamber and a quenching chamber through which filaments pass in a path from an extrusion device to a means for collecting filaments and a means to supply a flow of gas to the plenum chamber. The improvement comprises a mesh screen coextensive with the foam sheet positioned between the foam sheet and the quenching chamber.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: December 23, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ramunas L. Valteris, Gary L. Caldwell