Patents by Inventor Hu Xiaowei

Hu Xiaowei 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: 9133297
    Abstract: Provided are ultraviolet (UV)-curable polyols and polyurethane compositions made by reacting the inventive polyol with an isocyanate. The inventive ultraviolet (UV)-curable polyol is made by co-polymerizing an alkylene oxide, an unsaturated carboxylic acid or anhydride and a hydroxy functional compound in the presence of a double metal cyanide (DMC) complex catalyst such that the polyol has an ultra-low level of unsaturation. The inventive polyols may be used to produce prepolymers, which in turn may be useful in making thin films which in turn may provide such items as medical examination gloves and scientific gloves. The inventive ultraviolet (UV)-curable polyurethane compositions may also find use in or as coatings, adhesives, sealants, elastomers and the like.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: September 15, 2015
    Assignee: ALLNEX IP S.à.r.L.
    Inventors: Bi Le-Khac, Karl W. Haider, Ramesh Subramanian, Charles A. Gambino, James Edward Kassner, Hu Xiaowei, William J. Sim
  • Publication number: 20070265367
    Abstract: Provided are ultraviolet (UV)-curable polyols and polyurethane compositions made by reacting the inventive polyol with an isocyanate. The inventive ultraviolet (UV)-curable polyol is made by co-polymerizing an alkylene oxide, an unsaturated carboxylic acid or anhydride and a hydroxy functional compound in the presence of a double metal cyamide (DMC) complex catalyst such that the polyol has an ultra-low level of unsaturation. The inventive polyols may be used to produce prepolymers, which in turn may be useful in making thin films which in turn may provide such items as medical examination gloves and scientific gloves. The inventive ultraviolet (UV)-curable polyurethane compositions may also find use in or as coatings, adhesives, sealants, elastomers and the like.
    Type: Application
    Filed: May 15, 2006
    Publication date: November 15, 2007
    Inventors: Bi Le-Khac, Karl Haider, Ramesh Subramanian, Charles Gambino, James Kassner, Hu Xiaowei, William Sim