Patents by Inventor Glenn Alan Schwinn

Glenn Alan Schwinn 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).

  • PREPARATION OF VERY HIGH MOLECULAR WEIGHT POLYAMIDE FILAMENTS
    Publication number: 20090258226
    Abstract: Disclosed is the preparation of very high molecular weight polyamide, e.g., nylon, filaments, as indicated by such filaments exhibiting a very high Relative Viscosity (RV) value. Such filaments can be used to prepare polyamide staple fibers which are especially useful for industrial applications such as in papermachine felts. The filament preparation process involves a melt phase polymerization (MPP) procedure, optionally carried out in combination with a solid phase polymerization (SPP) procedure. Both of these procedures serve to increase the molecular weight and hence the RV of the polyamide filaments produced. These procedures are conducted under selected controlled conditions which permit realization of polyamide filaments of about 2 to 100 denier and which have RV values of greater than about 190. Such filaments also exhibit excellent tenacity and tenacity resistance properties.
    Type: Application
    Filed: October 13, 2008
    Publication date: October 15, 2009
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventors: GLENN ALAN SCHWINN, Gary Raymond West
  • High RV filaments and apparatus and process for making high RV flakes and the filaments
    Patent number: 6814939
    Abstract: The present invention relates to industrial high relative viscosity (RV) filaments, such as, for use in papermaking machine felts and other staple fiber applications. The invention is further directed to apparatus and processes for solid phase polymerization (SPP) of polyamide flake suitable for use, such as, in remelting and then spinning the industrial high RV filaments. The invention is also directed to processes for melt phase polymerization (MPP) of molten polymer for making the filaments.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: November 9, 2004
    Assignee: Inuisia North America S.รก.r.l.
    Inventors: Glenn Alan Schwinn, Gary Raymond West
  • Process of making high RV polyamide filaments
    Patent number: 6627129
    Abstract: The present invention relates to industrial high relative viscosity (RV) filaments, such as, for use in papermaking machine felts and other staple fiber applications. The invention is further directed to apparatus and processes for solid phase polymerization (SPP) of polyamide flake suitable for use, such as, in remelting and then spinning the industrial high RV filaments. The invention is also directed to processes for melt phase polymerization (MPP) of molten polymer for making the filaments.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: September 30, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Glenn Alan Schwinn, Gary Raymond West
  • High RV filaments and apparatus and process for making high RV flakes and the filaments
    Patent number: 6605694
    Abstract: The present invention relates to industrial high relative viscosity (RV) filaments, such as, for use in papermaking machine felts and other staple fiber applications. The invention is further directed to apparatus and processes for solid phase polymerization (SPP) of polyamide flake suitable for use, such as, in remelting and then spinning the industrial high RV filaments. The invention is also directed to processes for melt phase polymerization (MPP) of molten polymer for making the filaments.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: August 12, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Glenn Alan Schwinn, Gary Raymond West
  • High RV filaments, and apparatus and processes for making high RV flake and the filaments
    Patent number: 6235390
    Abstract: The present invention relates to industrial high relative viscosity (RV) filaments, such as, for use in papermaking machine felts and other staple fiber applications. The invention is further directed to apparatus and processes for solid phase polymerization (SPP) of polyamide flake suitable for use, such as, in remelting and then spinning the industrial high RV filaments. The invention is also directed to processes for melt phase polymerization (MPP) of molten polymer for making the filaments.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: May 22, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Glenn Alan Schwinn, Gary Raymond West