Patents by Inventor Ralph W. Feil

Ralph W. Feil 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).

  • Method and apparatus for modifying spun textile yarn
    Patent number: 5263311
    Abstract: A method of modifying surface characteristics, such as hairiness, and trash content by passing a spun yarn through an air jet nozzle. Data show reduced hairiness and improved cleanliness over normally wound yarn.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: November 23, 1993
    Assignee: Institute of Textile technology
    Inventors: Ralph W. Feil, Thomas M. Ellis