Patents by Inventor Hongjun YI

Hongjun YI 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 modifying non-woven chitosan fabric
    Patent number: 9119894
    Abstract: A method for modifying a non-woven fabric of chitosan fiber. The method includes: adding succinic anhydride to an industrial alcohol, ethanol, or acetone; controlling the mass ratio of succinic anhydride to the non-woven fabric at between 0.8 and 3.5; and stirring the resulting mixture until the succinic anhydride has dissolved to yield a succinic anhydride mixed solution; placing the succinic anhydride mixed solution in a constant temperature shaking bath; heating the succinic anhydride mixed solution; adding an HCl solution to the succinic anhydride mixed solution, and stirring evenly to yield a HCl mixed solution; immersing the non-woven fabric in the HCl mixed solution; dehydrating; immersing the non-woven fabric in ethanol or acetone; immersing the non-woven fabric in anhydrous ethanol or pure acetone; dehydrating; and air drying the non-woven fabric.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: September 1, 2015
    Assignee: QINGDAO JIFA NEW MATERIAL CO., LTD.
    Inventors: Yuhua Huang, Weidong Yang, Hongjun Yi
  • METHOD FOR MODIFYING NON-WOVEN CHITOSAN FABRIC
    Publication number: 20130273235
    Abstract: A method for modifying a non-woven fabric of chitosan fiber. The method includes: adding succinic anhydride to an industrial alcohol, ethanol, or acetone; controlling the mass ratio of succinic anhydride to the non-woven fabric at between 0.8 and 3.5; and stirring the resulting mixture until the succinic anhydride has dissolved to yield a succinic anhydride mixed solution; placing the succinic anhydride mixed solution in a constant temperature shaking bath; heating the succinic anhydride mixed solution; adding an HCl solution to the succinic anhydride mixed solution, and stirring evenly to yield a HCl mixed solution; immersing the non-woven fabric in the HCl mixed solution; dehydrating; immersing the non-woven fabric in ethanol or acetone; immersing the non-woven fabric in anhydrous ethanol or pure acetone; dehydrating; and air drying the non-woven fabric.
    Type: Application
    Filed: June 6, 2013
    Publication date: October 17, 2013
    Inventors: Yuhua HUANG, Weidong YANG, Hongjun YI