Patents by Inventor Davis E. Lee

Davis E. Lee 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 ply-twisting yarns having low levels of finish
    Patent number: 5263308
    Abstract: This invention relates to an improved method for ply-twisting nylon yarns at twisting speeds greater than 6000 rpm. More particularly, the invention involves coating the nylon fibers with less than about 1% by weight of finish containing an alkyl polyoxyalkylene carboxylate ester lubricant composition. The resulting ply-twisted yarn is especially suitable for use as pile in carpets.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: November 23, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Davis E. Lee, Peter M. Murphy
  • Modified hydrophilic polyesters
    Patent number: 5239019
    Abstract: A hydrophilic copolyester containing both polyoxyethylene diester and alkylene diester segments, and optionally containing other components, which copolyester has been modified after being formed by reaction with one or more polyols containing three or more hydroxy groups or one or more polyoxyethylene glycols or a mixture of one or more of such polyols and one or more of such glycols. The copolyester can be used in treating fibers and films.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: August 24, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Halling, Davis E. Lee, Charles F. Palmer, Jr.