Patents by Inventor Leif E. Elsby

Leif E. Elsby 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 for improving the filterability of a viscose solution
    Patent number: 4548647
    Abstract: The present invention provides a method for improving the filterability of a viscose solution by adding prior to the xanthation an ester compound containing alkyleneoxy units.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: October 22, 1985
    Assignee: Berol Kemi AB
    Inventors: Karl B. G. Alvryd, Leif E. Elsby, Hans I. Uneback