Patents by Inventor Yongquan Dong

Yongquan Dong 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).

  • An Amphoteric Polymer and an Alkenyl Succinic Anhydride Emulsion Containing the Same
    Publication number: 20190016880
    Abstract: The present invention is directed to an amphoteric polymer, a method for preparing an amphoteric polymer, use of the amphoteric polymer for emulsifying an alkenyl succinic anhydride. The present invention also provides an alkenyl succinic anhydride emulsion prepared using the amphoteric polymer, and a method for sizing paper using an alkenyl succinic anhydride emulsion prepared using the amphoteric polymer. The amphoteric polymer of the present invention is obtained by copolymerization of cationic monomers, non-ionic monomers, and anionic monomers.
    Type: Application
    Filed: December 19, 2016
    Publication date: January 17, 2019
    Applicant: Ecolab USA Inc.
    Inventors: Kun Hou, Yongquan Dong, Bo Zhu, Zhi Chen