Patents by Inventor Hangzhen Wu

Hangzhen Wu 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).

  • Publication number: 20230332001
    Abstract: The present invention is directed to an aqueous coating composition comprising, based on the weight of the composition: from 1 to 15 wt. % of a) at least one acrylic copolymer; from 50 to 75 wt. % of b) particulate pigment, wherein said pigment particles have an aspect ratio of from 1 to 2 and comprise first and second uncoated calcium carbonate particle grades, said first uncoated calcium carbonate grade being characterized by an average particle diameter (d50) of from 2 to 4 ?m and a d98 of from 20 to 30 ?m and said second uncoated calcium carbonate grade being characterized by an average particle diameter (d50) of from 20 to 40 ?m and a d98 of from 150 to 250 ?m; and, from 0.5 to 5 wt. % of c) at least one rosin ester.
    Type: Application
    Filed: June 19, 2023
    Publication date: October 19, 2023
    Inventors: Fiona Cappel, Ralf Sauer, Michael Klotz, Hangzhen Wu