Patents by Inventor Xiao P. Lei

Xiao P. Lei 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).

  • Flame-retardant treatment of fabrics
    Patent number: 5571288
    Abstract: In the flame-retardant treatment of fabrics, there is provided a means for increased "loading" of phosphorus compounds (up to 25% moisture is retained after impregnation and drying of the fabric). This in turn enables a phosphonium compound "add-on" of 50% to 73% (relative to the weight of the fabric) and gives a correspondingly higher degree of flame-retardant properties.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 5, 1996
    Assignee: Albright & Wilson UK Limited
    Inventors: Mohsen Zakikhani, Xiao P. Lei
  • Flame retardant and water-resistant treatment of fabrics
    Patent number: 5378243
    Abstract: In a method for the flame-retardant treatment of fabrics by impregnation with a condensate of a tetrakis (hydroxyorgano) phosphonium salt and, e.g., urea, the addition of one or more protonated and neutralized amines to the impregnation solution increases the efficiency of fixation of the phosphonium salt within the fibers, improves its uniform distribution within the system and leads to improved flame-retardant and water-resistant properties.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: January 3, 1995
    Assignee: Albright & Wilson Limited
    Inventors: Xiao P. Lei, David W. Speake, Mohsen Zakikhani