Patents by Inventor Sipei Zhang

Sipei Zhang 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).

  • Synthetic polymer rheology modifier and water retention agent replacement for cellulose ether in cement compositions
    Patent number: 10173925
    Abstract: The present invention provides substantially nonionic brush polymers having pendant polyether groups, preferably poly(alkylene glycol) groups, which polymers are useful as synthetic polymer substitutes for cellulose ethers in mortars and hydraulic binders. The brush polymers are preferably crosslinked, such as with ethylene glycol di(meth)acrylates.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: January 8, 2019
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Robert Baumann, Adam W. Freeman, Philip M. Imbesi, Marc Schmitz, Hongwei Shen, Wei-Wen Tsai, Sipei Zhang
  • SYNTHETIC POLYMER RHEOLOGY MODIFIER AND WATER RETENTION AGENT REPLACEMENT FOR CELLULOSE ETHER IN CEMENT COMPOSITIONS
    Publication number: 20170174567
    Abstract: The present invention provides substantially nonionic brush polymers having pendant polyether groups, preferably poly(alkylene glycol) groups, which polymers are useful as synthetic polymer substitutes for cellulose ethers in mortars and hydraulic binders. The brush polymers are preferably crosslinked, such as with ethylene glycol di(meth)acrylates.
    Type: Application
    Filed: March 27, 2015
    Publication date: June 22, 2017
    Applicants: Dow Europe GmbH, Dow Wolff Cellulosics GmbH & Co. OHG, The Dow Chemical Company
    Inventors: Robert Baumann, Adam W. Freeman, Philip M. Imbesi, Marc Schmitz, Hongwei Shen, Wei-Wen Tsai, Sipei Zhang