Patents by Inventor Wo Kong Kwok

Wo Kong Kwok 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).

  • Patent number: 6177369
    Abstract: A batt, which may be used for a mattress, a seat cushion or a ground pad for a sleeping bag, is compressed so that it has reduced false loft and reduced false support, and is therefore more durable for consumer use. The batt is compressed so that, when subjected to use for an average life cycle (usually six years), it has a thickness reduction of less than 15% and a reduction of load-at-half-height of less than 40%.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: January 23, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Wo Kong Kwok
  • Patent number: 5873964
    Abstract: Lofty battings are prepared by a process involving carding to make one or more webs of fibers, preferably using a blend of mechanically-crimped filling fibers with bicomponent fibers of helical configuration, and that preferably also contains binder fibers, the fiber orientations preferably being randomized in the web(s) before cross-lapping to build up the batt, and preferably followed by spraying with resin and curing, thus providing a bonded batt in which the loft is improved by the presence of the different crimp configurations and/or randomized orientations that are fixed in the fibers in the bonded batt.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: February 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Wo Kong Kwok
  • Patent number: 5840634
    Abstract: An improvement in the sealing of bonded batts of fiberfill is obtained by providing a barrier layer of bonded bicomponent binder fibers on one or both faces of the remainder of the batt to prevent or reduce the tendency of the fiberfill to leak through such faces.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: November 24, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Susan Carol Chamberlin, Wo Kong Kwok, Robert Wallace Slavin