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Roger Keith Siemionko

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  • Hockessin, DE, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Flash-spinning process and solution
    • Patent number 7,179,413
    • Issue date Feb 20, 2007
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Process for improving electrostatic charging of plexifilaments
    • Patent number 6,455,619
    • Issue date Sep 24, 2002
    • E. I. DuPont de Nemours and Company
    • David Jackson McGinty
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash spinning process and flash spinning solution with azeotropes
    • Patent number 6,319,970
    • Issue date Nov 20, 2001
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash spinning solution
    • Patent number 6,303,682
    • Issue date Oct 16, 2001
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash spinning process and flash spinning solution
    • Patent number 6,162,379
    • Issue date Dec 19, 2000
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash spinning process
    • Patent number 6,153,134
    • Issue date Nov 28, 2000
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash spinning process and flash spinning solution
    • Patent number 5,985,196
    • Issue date Nov 16, 1999
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash-spinning solution
    • Patent number 5,977,237
    • Issue date Nov 2, 1999
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash-spinning process
    • Patent number 5,874,036
    • Issue date Feb 23, 1999
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Flash spinning process
    • Patent number 5,672,307
    • Issue date Sep 30, 1997
    • E. I. Du Pont de Nemours and Company
    • Hyunkook Shin
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Process for improving electrostatic charging of plexifilaments
    • Patent number 5,643,525
    • Issue date Jul 1, 1997
    • E. I. Du Pont de Nemours and Company
    • David Jackson McGinty
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Aromatic polyesters and high strength filaments thereof
    • Patent number 4,412,058
    • Issue date Oct 25, 1983
    • E. I. Du Pont de Nemours and Company
    • Roger K. Siemionko
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Optically anisotropic melt forming polyesters
    • Patent number 4,370,466
    • Issue date Jan 25, 1983
    • E. I. Du Pont de Nemours and Company
    • Roger K. Siemionko
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Aromatic polyester and filaments
    • Patent number 4,359,569
    • Issue date Nov 16, 1982
    • E. I. Du Pont de Nemours and Company
    • Roger K. Siemionko
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Aromatic polyester and filaments
    • Patent number 4,347,349
    • Issue date Aug 31, 1982
    • E. I. Du Pont de Nemours and Company
    • Roger K. Siemionko
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING